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1. WO2020155166 - TERMINAL RADIO CELLULAIRE À FAIBLE CONSOMMATION D’ÉNERGIE

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Description

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Claims

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Drawings

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Description

Title of Invention : LOW POWER CONSUMPTION CELLULAR RADIO TERMINAL

TECHNICAL FIELD

[0001]
This patent document is directed generally to wireless communications.

BACKGROUND

[0002]
Mobile communication technologies are moving the world toward an increasingly connected and networked society. The rapid growth of mobile communications and advances in technology have led to greater demand for capacity, connectivity, and reliability. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency are also important to meeting the needs of various communication scenarios. Various techniques, including new ways to provide higher quality of service, longer battery life, and improved performance are being discussed.
[0003]
SUMMARY
[0004]
This document discloses methods, systems, apparatuses, and computer readable media related to wireless communication, and in particular to a method and apparatus for reducing the power consumption of user equipment.
[0005]
In one aspect, a method of wireless communication is disclosed. The method includes transmitting, from a first radio terminal to a second radio terminal, a configuration signaling; and transmitting a corresponding signal to the second radio terminal, wherein the corresponding signal is based on the configuration signaling.
[0006]
In another aspect, a method of wireless communication is disclosed. The method includes receiving, from a first radio terminal to a second radio terminal, a configuration signaling; and receiving a corresponding signal from a first radio terminal, wherein the corresponding signal is based on the configuration signaling.
[0007]
The details of one or more implementations are set forth in the accompanying attachments, the drawings, and the description below. Other features will be apparent from the description and drawings, and from the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008]
FIG. 1 depicts an example of a system, in accordance with some example embodiments;
[0009]
FIG. 2 depicts an example of an apparatus, in accordance with some example embodiments;
[0010]
FIG. 3 depicts an example of a process, in accordance with some example embodiments;
[0011]
FIG. 4A depicts another example of a process, in accordance with some example embodiments;
[0012]
FIG. 4B depicts another example of a process, in accordance with some example embodiments;
[0013]
FIG. 5 depicts an example of cross slot scheduling, in accordance with some example embodiments;
[0014]
FIG. 6 depicts an example of a time gap between a wake-up signal and an “on-duration” state, in accordance with some example embodiments;
[0015]
FIG. 7 depicts an example of timing of a go-to-sleep signal, in accordance with some example embodiments;
[0016]
FIG. 8 depicts an example of periodic monitoring of a physical downlink control channel (PDCCH) , in accordance with some example embodiments;
[0017]
FIG. 9 depicts an example a process for configuring parameters with UE assistant information, in accordance with some example embodiments;
[0018]
FIG. 10 depicts an example a process for configuring parameters with UE assistant information through downlink control information (DCI) , in accordance with some example embodiments;
[0019]
FIG. 11 depicts an example a process for configuring parameters with UE assistant information through radio resource control (RRC) , in accordance with some example embodiments;
[0020]
FIG. 12 depicts an example a process for configuring parameters with UE assistant information through medium access control -control element (MAC-CE) , in accordance with some example embodiments;
[0021]
FIG. 13 depicts an example a process for a wake-up signal (WUS or WUP) with discontinuous reception (DRX) operation (DRX configuration) , in accordance with some example embodiments;
[0022]
FIG. 14 depicts an example a process for a WUS signal (or WUP) with a PDCCH monitoring configuration (search space configuration) , in accordance with some example embodiments;
[0023]
FIG. 15 depicts an example a process for configuration of periodic signal, in accordance with some example embodiments; and
[0024]
FIG. 16 depicts an example a process for trigger state or configuration of preparation period, in accordance with some example embodiments.

DETAILED DESCRIPTION

[0025]
Section headings are used in the present document only to improve readability and do not limit scope of the disclosed embodiments and techniques in each section to only that section.
[0026]
In NR (New Radio) communication system, the power consumption of the UE may be very high due to the increased level of computational complexity of implementation and also due to the amount of data that the UE may be producing or consuming. Since the UE directly relates to the user’s experience, the large power consumption of the UE results in undesired user experience. In the existing 5G communication system, configuration parameters of UE are generally configured by a network-side device, for example, a base station. The parameters configured by the network-side device may not quickly adapt to the instant traffic changes. In case that the configuration parameters are not updated or reconfigured based on the traffic, it is possible that the parameters may configure the UE to have an adverse effect of unnecessarily increasing power consumption.
[0027]
In the 5G new radio (NR) communication system, the power consumption of the user equipment (UE) may be high thereby causing a less satisfactory user experience. Some UE parameters are configured by the base station or network in the current system which can accommodate regular traffic. However, the current system cannot adapt to rapid changes in traffic. The configuration parameters are not necessarily related to the traffic, which may cause unnecessary power consumption. Disclosed herein are techniques for configuring parameters in the UE to reduce power consumption.
[0028]
The configuration parameters include time domain, frequency domain, and spatial domain parameters. Generally, after the UE receives a capability inquiry, the UE reports its capability information to the base station and network. The UE capability information includes parameter values associated with a maximum capability supported by the UE, including time domain processing capability, frequency domain processing capability, and multiple-input multiple-output (MIMO) processing capability. After acquiring the UE capability information, the base station configures the UE parameters and schedules the UE according to a scheduling algorithm and a channel state. Disclosed are techniques for configuring the UE to perform ultra-low latency communications, ultra-reliable communication, massive machine-type communications (mMTC) , and enhanced mobile broadband (eMBB) while conserving power at the UE. Otherwise, the UE may unnecessarily waste power.
[0029]
In some example embodiments, the base station acquires configuration parameters from the UE, and configures the UE to enter a power-saving state according to one or more preset parameters. The configuration parameters include at least one of the following: slot offset threshold, number of slots, power saving signal, reference signal, activation/de-activation of carrier aggregation/dual connectivity, RRC parameter, or MAC-CE parameter.
[0030]
UE configuration parameters include: frequency, time, antenna domains and other parameters. The UE reports its capability information to the base station after receiving a UE capability inquiry from the base station. The base station configures parameters for the UE and schedules communications resources according to scheduling strategies and channel state information after receiving the UE capability information.
[0031]
In some example embodiments, a base station sets the UE into a power saving state, so the UE can adapt to different traffic conditions in order to save power. For example, when the UE parameters are configured for ultra-reliable low-latency communication (URLLC) , without a reconfiguration of the parameters, unnecessary power consumption may occur at the UE when used in eMBB.
[0032]
The disclosed technology provides implementations and examples of parameter configurations for power savings in a wireless communication. Some implementations of the disclosed technology provide techniques to prevent or reduce unnecessary power consumption of the UE by configuring the UE to conserve power.
[0033]
FIG. 1 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a BS 120 and one or more UEs 111, 112 and 113. In some example embodiments, the user equipment (UEs) access the BS 120 (also referred to herein as the network or gNB) using configuration messages 131, 132, 133 passed from UEs 111, 112, and 113, respectively, to BS 120 enabling subsequent communication to the UEs via messages 141, 142, 143. The UE may be, for example, a smartphone, cell phone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, or any other wirelessly connected computing device.
[0034]
FIG. 2 shows an example of an apparatus, in accordance with some example embodiments. An apparatus 210 such as a base station 120 or a wireless device such as UEs 111, 112, and/or 113 can include processor electronics 220 such as a microprocessor that implements one or more of the features disclosed in this document. The apparatus 210 can include transceiver electronics 230 to send and/or receive wireless signals over one or more communication interfaces such as antenna 240. The apparatus 210 can include other communication interfaces for transmitting and receiving data. The apparatus 210 can include one or more memories (not explicitly shown) configured to store information such as data and/or executable instructions. In some implementations, the processor electronics 220 can include at least a portion of transceiver electronics 230. In some embodiments, at least some of the disclosed techniques, modules or functions are implemented using the apparatus 210.
[0035]
FIG. 3 shows a process for configuring parameters of a UE. The configured parameters may include parameters such as time, frequency, spatial domain, and so on. As shown in FIG. 3, the network-side device (e.g., base station) first sends a UE capability inquiry to the UE. After the UE receives the capability inquiry from the network-side device, the UE reports its capability information, which may be referred to as UE capability information. The parameter values related to the maximum UE capability are included in the UE capability information which includes time domain processing capability, frequency domain processing capability and MIMO processing capability. After receiving the UE capability information, the network configures the UE with configuration parameters based on scheduling strategies and channel state information. Some configuration parameter values, however, may cause unnecessary power consumption. For example, the parameter values to configure the UE to perform URLLC may cause unnecessary power consumption when used in eMBB. The parameters values for heavy data traffic (e.g., high data rate) may cause unnecessary power consumption when the UE is working in low data traffic (e.g., low data rate) . The disclosed technology provides parameters configuration schemes to prevent or reduce the unnecessary power consumption and achieve a power savings at the UE. In some example embodiments, the UE can adapt to different traffic to reduce power consumption.
[0036]
The techniques and methods disclosed in this document for parameter configuration can be applied to a new radio access technology (NR) communication system, an LTE mobile communication system, a fifth generation (5G) mobile communication system, or other wireless/wired communication system. The techniques or methods can be performed at a network-side device such as a base station. In some implementations, the base station may include at least one of an access point (AP) , a node B, a radio network controller (RNC) , an evolved node B (eNB or gNB) , a base station controller (BSC) , a base transceiver station (BTS) , a base station (BS) , a transceiver function (TF) , a radio router, a radio transceiver, a basic service unit, an extended service unit, a radio base station (RBS) , or some other terminology.
[0037]
FIG. 4A shows an example of a process, in accordance with some example embodiments. For example, a process for a base station such as a gNB to configure a UE (e.g., the first radio terminal may be the gNB and the second radio terminal may be the UE) . At 410, the base station transmits a configuration signaling to a UE. One or more configuration parameters are associated with the configuration signaling. At 420, based on the configuration signaling, the gNB performs a transmission with the UE (transmits a corresponding signal to UE) . In some implementations, the configuration signaling may include at least one of following: a slot offset threshold configuration, a configuration of power saving signal, a configuration of reference signal, a configuration of activation/de-activation of carrier aggregation/dual connectivity, DRX parameters, RRC parameters, and/or MAC-CE parameters. The following details the parameters at 410.
[0038]
The slot offset threshold configuration may include a slot offset threshold. The slot offset threshold may include at least one of following parameters: slot offset threshold of a physical downlink shared channel (PDSCH) , a slot offset threshold of a physical uplink shared channel (PUSCH) , a slot offset threshold of PDSCH to Hybrid automatic repeat request (HARQ) , slot offset threshold of aperiodic-Channel state information reference signal (CSI-RS) , threshold of PDSCH decoding time, threshold of PUSCH preparation time, threshold of channel state information (CSI) computation delay.
[0039]
The power saving signal may include: a wake-up signal, and/or a go-to-sleep signal.
[0040]
The reference signal may include at least one of: a tracking reference signal, a synchronization signal block (SSB) reference signal, a secondary synchronization signal, a primary synchronization signal, or a CSI-reference signal.
[0041]
The configuration of activation/de-activation of carrier aggregation/dual connectivity (CA/DC) may be determined by scheduling Downlink control information (DCI) . The scheduling DCI may include at least one of: a DCI format0_0, a DCI format0_1, a DCI format1_0, a DCI format1_1. Since the HARQ (ACK/NACK) must be reported to gNB for PDSCH which is scheduled by scheduling DCI, UE and gNB have the same understanding for state of CA/DC by which the UE can reduce some power consumption.
[0042]
The radio resource control (RRC) parameters may include at least one of: physical downlink control channel (PDCCH) monitoring period, search space, or a CSI request.
[0043]
FIG. 4B shows an example of a communication configuration scheme based on the disclosed technology for a radio terminal (e.g., UE) . As shown in FIG. 4B, at 430, a UE receives a configuration signaling from a base station. At 440, based on the configuration signaling, the UE performs a transmission with the gNB (or receiving a corresponding signal) . The configuration signaling may include at least one of following parameters: a slot offset threshold configuration, a configuration of power saving signal, a configuration of reference signal, a configuration of activation/de-activation of carrier aggregation/dual connectivity, RRC parameters, or MAC-CE parameters.
[0044]
Discontinuous reception (DRX) can be used to reduce user equipment (UE) power consumption. In DRX, the base station (or gNodeB or gNB) configures a DRX cycle for the UE. The configuration signaling comprises DRX parameters. During each DRX cycle, the UE monitors the physical downlink control channel (PDCCH) at a predetermined time, and if the UE detects a signal on the PDCCH, then the UE enters a working state and carries on the transmission and the reception of data and control information. Otherwise, the UE remains in the inactive state (doesn’t monitor PDCCH) . In an inactive state of a user equipment, a part of the transmission, reception, and/or processing circuity may be shut down to reduce power consumption.
[0045]
The disclosed technology provides various parameter configurations for the configuration signaling to achieve power savings at the UE by including different parameters obtained for gNB. Implementations for saving power via processing at the UE are also provided.
[0046]
In some example embodiments, the configuration signaling includes a slot offset threshold configuration. The transmission information associated with the slot offset threshold configuration comprises may include a slot offset threshold. The slot offset threshold may include one or more of: a slot offset threshold of a physical downlink shared channel (PDSCH) , a slot offset threshold of a physical uplink shared channel (PUSCH) , a slot offset threshold PDSCH to a hybrid automatic repeat request (HARQ) , a slot offset threshold of an aperiodic channel state information reference signal (CSI-RS) , a threshold of PDSCH decoding time, a threshold of PUSCH preparation time, or a threshold of channel state information (CSI) computation delay.
[0047]
Example 1
[0048]
In this implementation for gNB, the configuration signaling at 410 is a slot offset threshold configuration. The transmission information associated with the slot offset threshold configuration includes a slot offset threshold. The slot offset threshold is determined by the gNB. The slot offset threshold is the minimum slot offset which can be used for scheduling (grant) for gNB. If the gNB configures the UE with the slot offset threshold, the gNB will schedule slot offset larger than or equal to the slot offset threshold. For example, if the list of slot offset values {0 2 4 6} , the slot offset of {2 4 6} can be used for scheduling when the slot offset threshold is equal to 2. In another example, a slot offset of {4 6} can be used for scheduling when the slot offset threshold is equal to 4. Another example, the slot offset in the list of slot offset values must be larger than or equal to the slot offset threshold. Such as, the slot offset threshold is equal to 4 and the minimum value in the list of slot offset values is larger than or equal to 4. If data traffic of URLLC service is transmitted, the slot offset threshold is equal to 0 or the slot offset threshold is disabled. Otherwise, the slot offset threshold is an integer larger than 0, such as equal to 1, 2, 3, 4, 6, 8, 10, 12 or 16. If the slot offset threshold is larger than 0, it is referred to as ‘cross-slot scheduling’ . During the slot offset, the UE can go into sleep (such as micro sleep or light sleep) as soon as possible after receiving the last orthogonal frequency division multiplexing (OFDM) symbol of PDCCH and the power consumption can be reduced.
[0049]
In another example, the slot offset threshold may be determined by one of following parameters: a bandwidth part (BWP) configuration, a BWP index, or a cell configuration. For example, if the BWP is configured as an initial BWP or default BWP or power saving BWP, a slot offset threshold may be larger than 0, such as 1, 2, 3, 4, 6, or 8. For example, if BWP index is equal to 0 or BWP index is equal to 1, slot offset threshold is larger than 0, such as 1, 2, 3, 4, 6, or 8. An initial downlink (DL) BWP is defined by a location and a number of contiguous physical resource blocks (PRBs) , starting from a PRB with the lowest index and ending at a PRB with the highest index among PRBs of a control resource set for Type0-PDCCH common search space, and a subcarrier spacing and a cyclic prefix for PDCCH reception in the control resource set for Type0-PDCCH common search space. The initial DL BWP also can be provided by a higher layer parameter such as initialDownlinkBWP. For a dedicated BWP configuration, the UE can be provided by higher layer parameter firstActiveDownlinkBWP-Id a first DL BWP for receptions and by higher layer parameter firstActiveUplinkBWP-Id a first UL BWP for transmissions on the primary cell. The default DL BWP among the configured DL BWPs can be configured by a higher layer parameter such as defaultDownlinkBWP-Id or it also can be defined as the initial DL BWP. Power saving BWP has the smallest bandwidth among the configured BWPs. In some implementations, CSI measurement and periodic CSI reporting may be done for low power BWP, and uplink or downlink grant is allowed. Some instant message applications (such as WeChat) has a small data payload to transmit or receive. The power saving BWP can be used with very low power consumption for its very small bandwidth. In an example of power saving BWP, the bandwidth is one of 1.25 MHz, 2.5 MHz, or 5 MHz. In another example of power saving BWP, its bandwidth is smallest among the configured BWPs. For example, the bandwidths of configured BWPs are {5 MHz, 10 MHz, 15 MHz, 20 MHz} , and the bandwidth of power saving BWP is set as 5 MHz.
[0050]
In another example, if a serving cell is configured as a non-active cell or a serving cell is configured as an inactive cell or a serving cell is configured as a dormant cell, the slot offset threshold is larger than 0, such as 1, 2, 3, 4, 6, or 8. In another example, the slot offset threshold for initial BWP or default BWP or power saving BWP is larger than the slot offset threshold for dedicated BWP, such as the slot offset threshold for initial BWP or default BWP is 2 (or 4) , and the slot offset threshold for dedicated BWP is 0 (or 1) . If a dormant secondary cell (SCell) state is deactivated, the UE does not have to perform any measurement or operations on the SCell. When the SCell is in the dormant state, the UE may perform a channel quality indicator (CQI) measurements and reporting, albeit at a much sparser periodicity. The transitioning from the dormant state to the active state is still much shorter than a transitioning from the deactivated state to the active state.
[0051]
In another example, the slot offset threshold for a non-active cell or an inactive cell or a dormant cell is larger than the slot offset threshold for an active cell, such as the slot offset threshold for a non-active cell or an inactive cell or a dormant cell is 2, 4 or 8, and the slot offset threshold for an active cell is 0 or 1.
[0052]
In another example, the slot offset threshold may be determined by: UE assistant information and a list of time-domain configurations. FIG. 9 shows a process for configuration parameters with UE assistant information. As shown in FIG. 9, the network device first sends a UE assistant information inquiry to the UE. After the reception of assistant information inquiry from the network-side device, the UE reports its preferred configuration parameters (UE assistant information) to the gNB. After receiving the UE preferred configuration parameters (UE assistant information) , the network configures the UE with configuration parameters based on the UE assistant information. UE assistant information includes at least one of: a preferred slot offset threshold, a preferred slot offset index, a differential slot offset threshold. The preferred slot offset threshold in the UE assistant information is one value in the list of time-domain configurations. For example, all slot offsets in the list of time-domain configurations are defined as {0, 1, 4, 6} and the preferred slot offset threshold in UE assistant information is 1. gNB chooses an appropriate value as a slot offset threshold and configures the UE. The appropriate value is decided by the UE as a preferred slot offset threshold. The appropriate value is larger than or equal to the UE preferred slot offset threshold, such as 1, 4 or 6.
[0053]
In another example, the preferred slot offset threshold is determined by the preferred slot offset index in the UE assistant information and a list of time-domain configurations. For example, the list of time-domain configurations is {0, 3, 4, 5} , the preferred slot offset threshold is equal to 3 when the preferred slot offset index is 1, and the preferred slot offset threshold is equal to 5 when the preferred slot offset index is 3.
[0054]
In another example, the preferred slot offset threshold is determined by the differential slot offset threshold. For example, if the current preferred slot offset threshold is 2, the preferred slot offset threshold will be changed into 5 (=2+3) when the differential slot offset threshold of 3 in UE assistant information, and the preferred slot offset threshold will be changed to 1 (=2-1) when the differential slot offset threshold of -1 in UE assistant information. The absolute value of differential slot offset threshold is less than 3 or 4.
[0055]
In the implementation for the UE, as in FIG. 4B, a configuration signaling received at 430 is a slot offset threshold configuration. The transmission information associated with the slot offset threshold configuration includes a slot offset threshold. The slot offset threshold is defined as the minimum slot offset which can be used for scheduling by the gNB. If the UE is configured with the slot offset threshold, the UE knows that it is scheduled with a slot offset larger than or equal to the slot offset threshold. For example, if the list of slot offset is {0 2 4 6} , the slot offset of {2 4 6} can be used for data scheduling when the slot offset threshold is equal to 2, and the slot offset of {4 6} can be used for data scheduling when the slot offset threshold is equal to 4. If data traffic of URLLC service is transmitted, the slot offset threshold may be equal to 0 or the slot offset threshold is disabled. Otherwise, the slot offset threshold may be an integer larger than 0, such as equal to 1, 2, 3, 4, 6, 8, 10, 12 or 16. If the slot offset threshold is larger than 0, it is referred to as ‘cross-slot scheduling’ . During the slot offset, the UE can go into sleep (such as micro sleep or light sleep) as soon as possible after receiving the last OFDM symbol of PDCCH thereby reducing the power consumption of the UE. The slot offset threshold defined in Example 1 can be used as the parameters received for UE in FIG. 4B.
[0056]
The slot offset threshold can be defined for at least one of following: a slot offset threshold of PDSCH, a slot offset threshold of PUSCH, a slot offset threshold of PDSCH to HARQ, a slot offset threshold of aperiodic-CSI-RS, a threshold of PDSCH decoding time, a threshold of PUSCH preparation time, a threshold of CSI computation delay. The slot offset thresholds are described as below.
[0057]
Example 1a
[0058]
The slot offset threshold is a slot offset threshold of PDSCH (k0) . The slot offset of PDSCH (k0) is defined as the time gap between the PDCCH and its scheduling PDSCH. And, slot offset threshold of PDSCH is defined as the minimum slot offset of PDSCH in list of time-domain configurations for PDSCH which can be used for data scheduling. The list of time-domain configurations for PDSCH contains a set of slot offsets of PDSCH (k0) .
[0059]
FIG. 5 shows an example of cross slot scheduling for PDSCH with k0 larger than 0. The slot offset threshold of PDSCH (k0) is 2 and the list of time-domain configurations for PDSCH is {1, 2, 3} . The slot offset is equal to 2 slots is scheduled by gNB which is equal to the slot offset threshold of PDSCH (or larger than the slot offset threshold of PDSCH) . The signal in the physical downlink control channel (PDCCH) 302 at slot 0 is monitored and decoded (blind-decoded) to obtain a DCI. The DCI indicates the position of the PDSCH 304 at slot 2. During the slot offset 312, the UE goes into sleep thereby reducing power consumption.
[0060]
In one implementation for a UE, a parameter received at 430 is a slot offset threshold. The slot offset threshold is defined as a slot offset threshold of PDSCH (k0) . The slot offset of PDSCH (k0) is defined as the time gap between the PDCCH and its scheduling PDSCH. The UE has 2 states: a sleep state (for power saving, such as micro sleep, light sleep or deep sleep) and an active state (high power for signal receiving /processing) . Slots with PDCCH monitoring only (without any scheduling grant and PDSCH/PUSCH/PUCCH) take a significant portion of time and energy. The occasion when the UE monitors the PDCCH only without any scheduling grant and PDSCH/PUSCH/PUCCH will be referred to as PDCCH monitoring only case for the ease of reference. If the UE is unaware of the cross-slot scheduling of PDSCH in advance, it needs to receive the remaining OFDM symbols corresponding to PDCCH decoding time and it may lead to unnecessary power consumption. Radio frequency (RF) dominates the overall power consumption in the PDCCH monitoring only case. The sleep state (micro sleep) may be the most efficient power saving scheme in the PDCCH monitoring only case. During the micro sleep, RF components are turned off, when no grant is detected within a slot. If the UE knows the slot offset threshold in advance (cross scheduling for PDSCH) , it can go into sleep (such as micro sleep) as soon as possible after receiving the last OFDM symbol of PDCCH and the power consumption can be reduced, as shown in FIG. 5. The UE can go into micro sleep at 306 after receiving the OFDM symbols of PDCCH at 310.
[0061]
Example 1b
[0062]
The slot offset threshold is defined as a slot offset threshold of PUSCH (k2) . The slot offset of PUSCH (k2) is the time gap between the PDCCH and its scheduling PUSCH. And, slot offset threshold of PUSCH is the minimum slot offset of PUSCH in a list of time-domain configurations for PUSCH which can be used for scheduling. The list of time-domain configurations for PUSCH contains a set of slot offsets of PUSCH (k2) .
[0063]
In one implementation for the UE, a parameter received at 430 is a slot offset threshold. The slot offset threshold is slot offset threshold of PUSCH (k2) . The slot offset of PUSCH (k2) is the time gap between the PDCCH and its scheduling PUSCH. The UE has 2 states: sleep state and active state. Slots with PDCCH monitoring only (without any scheduling grant and PUSCH) take a significant portion of time and energy. If the UE knows the slot offset threshold in advance (cross scheduling for PUSCH) , it can go to sleep (such as micro sleep) after receiving the last OFDM symbol of PDCCH and the power consumption may be reduced.
[0064]
Example 1c
[0065]
The slot offset threshold is a slot offset threshold of PDSCH to HARQ (k1) . The slot offset of PDSCH to HARQ (k1) is the time gap between the PDSCH and its HARQ. And, a slot offset threshold of PDSCH to HARQ is the minimum slot offset of PDSCH to HARQ in a list of timing for given PDSCH to the DL ACK (dl-DataToUL-ACK) which can be used for scheduling. The list of timing for given PDSCH to the DL ACK (dl-DataToUL-ACK) contains a set of 8 slot offset of PDSCH to HARQ (k1) .
[0066]
In one implementation for UE, a parameter received at 430 is slot offset threshold. The slot offset threshold is a slot offset threshold of PDSCH to HARQ (k1) . The slot offset of PDSCH to HARQ (k1) is the time gap between the PDSCH and its HARQ. If the UE knows the slot offset threshold in advance (cross scheduling for PUSCH) , it can go to sleep (such as micro sleep) after receiving the last OFDM symbol of PDCCH and the power consumption may be reduced.
[0067]
Example 1d
[0068]
The slot offset threshold is a slot offset threshold of aperiodic CSI-RS. The slot offset of an aperiodic CSI-RS is the time gap between the PDCCH and an aperiodic CSI-RS occasion. The slot offset threshold of an aperiodic CSI-RS is the minimum slot offset of aperiodic CSI-RS in a list of slot offsets of aperiodic CSI-RS which can be used for scheduling.
[0069]
Example 1e
[0070]
The slot offset threshold is a slot offset threshold of a PDSCH decoding time. If the first uplink symbol of the PUCCH which carries the hybrid automatic repeat request acknowledgement (HARQ-ACK) information, as defined by the assigned HARQ-ACK timing K 1 and the PUCCH resource to be used and including the effect of the timing advance, starts no earlier than at symbol L 1, where L 1 is the next uplink symbol with its CP starting after a time
[0071]
T proc, 1= (N 1+d 1, 1) (2048+144) ·κ2 ·T C Equation 1
[0072]
after the end of the last symbol of the PDSCH carrying the TB being acknowledged, then the UE shall provide a valid HARQ-ACK message. The PDSCH decoding time is defined as N 1. The value of T proc, 1 denotes the minimum processing time of PDSCH. The value of μ is defined as the sub-carrier spacing index (0 for 15 KHz, 1 for 30 KHz, 2 for 60 KHz, 3 for 120 KHz, 4 for 240 KHz, 5 for 480 KHz) . The value of κ is equal to 64. T c can be defined as T c=1/ (Δf max·N f) , where Δf max=480·10 3 Hz and N f=4096. The value of d 1, 1 is determined by last symbol index of PDSCH, such as, if the last symbol of PDSCH is on the i-th symbol of the slot where i < 7, then d 1, 1 = 7 -i, otherwise d 1, 1 = 0.
[0073]
Example 1f
[0074]
The slot offset threshold is a slot offset threshold of a PUSCH preparation time. If the first uplink symbol in the PUSCH allocation for a transport block, including the dedicated demodulation reference signals (DM-RS) , as defined by the slot offset K 2 and the start and length indicator start and length indicator value (SLIV) of the scheduling DCI, is no earlier than at symbol L 2, where L 2 is defined as the next uplink symbol with its cyclic prefix (CP) starting at a time,
[0075]
T proc, 2=max ( (N 2+d 2, 1) (2048+144) ·κ2 ·T C, d 2, 2) Equation 2
[0076]
after the end of the last symbol of the PDCCH carrying the DCI scheduling the PUSCH, then the UE shall transmit the transport block. The PUSCH preparation time is defined as N 2. The value of T proc, 2 denotes the minimum processing time of PUSCH. The value of μ is defined as the sub-carrier spacing index (0 for 15 KHz, 1 for 30 KHz, 2 for 60 KHz, 3 for 120 KHz, 4 for 240 KHz, 5 for 480 KHz) . The value of κ is equal to 64. T c is defined as T c=1/ (Δf max·N f) , where Δf max=480·10 3 Hz and N f=4096. The value of d 2, 1 is determined by PUSCH and DM-RS, such as, if the first symbol of the PUSCH allocation consists of DM-RS only, then d 2, 1 = 0, otherwise d 2, 1 = 1. The value of d 2, 2 is BWP switching time.
[0077]
Example 1g
[0078]
The slot offset threshold may include the following parameters: a slot offset threshold of PDSCH, a slot offset threshold of PUSCH, a slot offset threshold of PDSCH to HARQ, a slot offset threshold of aperiodic-CSI-RS, a threshold of PDSCH decoding time, a threshold of PUSCH preparation time, threshold of CSI computation delay. The slot offset threshold for each parameter may be determined by a primary cell and a secondary cell. If PDCCH is not granted on a primary cell, the slot offset threshold for the parameters (slot offset threshold of PDSCH, slot offset threshold of PUSCH, slot offset threshold of PDSCH to HARQ, slot offset threshold of aperiodic-CSI-RS, threshold of PDSCH decoding time, threshold of PUSCH preparation time, threshold of CSI computation delay) are larger than 0. In another example, if PDCCH is not granted on a primary cell, the slot offset threshold for each parameter (slot offset threshold of PDSCH, slot offset threshold of PUSCH, slot offset threshold of PDSCH to HARQ, slot offset threshold of aperiodic-CSI-RS, threshold of PDSCH decoding time, threshold of PUSCH preparation time, threshold of CSI computation delay) is equal to the largest value in each parameter’s slot offset list.
[0079]
Example 2
[0080]
In this implementation for gNB, a configuration signaling transmitted at 410 is a configuration of wake-up signal (or power saving signal based on PDCCH (WUP) , or power saving signal based on DCI (WUD) , power saving signal based on sequence (WUS) ) . As shown in FIG. 6, during DRX operation (including an “on-duration” state and an “off-duration” state) , the wake-up signal is transmitted to the UE before the “on-duration” state. The configuration of wake-up signal includes a time gap. The time gap between the wake-up signal and the “on-duration” state of DRX is based on the determination of whether the one or more parameters satisfy a predetermined condition. The predetermined condition may be varied depending on the parameters. For example, the condition may include a bandwidth part indicator in DCI. For example, if the bandwidth part indicator indicates a new BWP to be used (changing BWP index) , a time gap between wake-up signal and “on-duration” state of DRX is larger than 0.
[0081]
In another example, a wake-up signal includes at least a bandwidth part indicator. And, the time gap between a wake-up signal and an “on-duration” state of DRX is determined by at least one of following parameters: a bandwidth part indicator in wake-up signal, a bandwidth part indicator in last DCI, a BWP switch delay, a sub-carrier spacing, a current BWP index, a frequency domain bandwidth, a frequency domain location. For example, the time gap between a wake-up signal and an “on-duration” state of DRX may be determined by the bandwidth part indicator in the wake-up signal, a current BWP index, and a BWP switch delay. If the bandwidth part indicator in the wake-up signal is different with the current BWP index (or a BWP switching request is transmitted to UE by wake-up signal) , the time gap between wake-up signal and “on-duration” state of DRX is equal to BWP switch delay. Otherwise, the time gap between wake-up signal and “on-duration” state of DRX is equal to 0.
[0082]
BWP switch delay is defined in Table 1. For DCI-based BWP switch, after the UE receives BWP switching request at slot n on a serving cell, UE shall be able to receive PDSCH (for DL active BWP switch) or transmit PUSCH (for UL active BWP switch) on the new BWP on the serving cell on which BWP switch occurs no later than at slot n+Y, wherein Y is BWP switch delay. UE shall finish BWP switch within the time duration Y defined in Table 1.
[0083]
Table 1: BWP switch delay
[0084]
[0085]
FIG. 6 shows an example of a time gap 610 between a wake-up signal and an “on-duration” state of DRX. A BWP switching request (BWP0 with sub-carrier spacing of 0 is changed to BWP0 with sub-carrier spacing of 1) is transmitted to the UE. According to Table 1, the BWP switch delay is equal to 3 ms. Therefore, the time gap 610 between the wake-up signal and the “on-duration” state of DRX in FIG. 6 is equal to 3 ms. Since the BWP is switched successfully and the DRX “on-duration” is activated simultaneously, there is no unnecessary power consumption for waiting.
[0086]
In another example, the wake-up signal may be determined by at least one of following: search space and control resource set. For example, the time-domain location of the wake-up signal is defined by a search space and the frequency domain location of the wake-up signal is defined by a control resource set. In another example, the time&frequency domain location of the wake-up signal is defined by a search space. The bandwidth of the wake-up signal is equal to the bandwidth of current BWP. In another example, the time&frequency domain location of the wake-up signal is defined by the control resource set.
[0087]
In another example, the wake-up signal can be configured as one or more of the following: UE specific signal and UE group specific signal. If the wake-up signal is configured as a UE specific signal, it is scrambled by one of following: a user equipment identifier (UE-ID) , a cell radio network temporary identifier (C-RNTI) , or a power saving radio network temporary Identifier (RNTI) . If the wake-up signal is configured as UE group specific signal, it is scrambled by one of following: some bits of each UE-ID, all bits of each UE-ID, C-RNTI for each UE, or power saving RNTI. For a UE group specific wake-up signal, all UEs in group are configured with the same DRX cycle.
[0088]
In the implementation for UE, as in FIG. 4B, a parameter received at 430 is a wake-up signal. As shown in FIG. 6, during DRX operation, the UE receives the wake-up signal during DRX operation (including “on-duration” state and “off-duration” state) . The UE should wake up to monitor PDCCH at an “on-duration” state, and the UE should go to sleep at an “off-duration” state. The time gap between the received wake-up signal and the “on-duration” state of DRX is based on the determination whether the one or more parameters satisfy a predetermined condition. The predetermined condition may be varied depending on the parameters. For example, the condition may include bandwidth part indicator in DCI. For example, if the bandwidth part indicator indicates a new BWP to be used (such as changing BWP index) , time gap between wake-up signal and “on-duration” state of DRX is larger than 0. The wake-up signal defined in Example 2 can be used as the parameters received at 430 for UE in FIG. 4B.
[0089]
Example 3
[0090]
In this implementation for a base station or gNB, the configuration signaling transmitted at 410 is a go-to-sleep signal. The configuration of go-to-sleep signal includes one or more of the following parameters: a number of nonactive DRX cycles, a number of nonactive slots, a number of nonactive millisecond, a DRX short cycle, a DRX long cycle, an index of DRX parameter sets.
[0091]
For example, the transmission information associated with the go-to-sleep signal may include a number of nonactive DRX cycles. The gNB may send a go-to-sleep signal (including a number of nonactive DRX cycles, such as x0) to the UE, then the gNB will not send data to the UE for the future x0 DRX cycles including the current DRX cycle and the next (x0-1) DRX cycles. Since the UE knows there is no data to be granted in x0 DRX cycles, it can go to sleep to reducer power consumption. FIG. 7 shows an example of a go-to-sleep signal of x0=3 nonactive DRX cycles with DRX operation. At 710, 720, and 730, the gNB will not send data to the UE and the UE can stay asleep for power saving. At 740, the gNB may send data to the UE and the UE may wake up to monitor the PDCCH.
[0092]
In another example, the transmission information associated with the go-to-sleep signal includes a number of nonactive slots (measured in time such as in slot or milliseconds (ms) ) . The gNB may send a go-to-sleep signal (including a number of nonactive slots, such as x1=2 or 4, to the UE, and the gNB will not send data to the UE in the future x1 slots. Since the UE knows there is no data to be granted in x1 slots, the UE can go to sleep to reduce power consumption.
[0093]
In another example, the transmission information associated with the go-to-sleep signal includes a value of DRX short cycle. The gNB sends a go-to-sleep signal (including a value of DRX short cycle, such as x2 ms) to the UE, and the gNB will send data to the UE according to the new DRX short cycle of x2 ms, such as x2=8 ms. The UE may wake up to monitor the PDCCH according to the new DRX short cycle of 8 ms. With new DRX short cycle, UE may have lower power consumption.
[0094]
In another example, the transmission information associated with the go-to-sleep signal includes a value of DRX long cycle. The gNB sends a go-to-sleep signal including a value of DRX long cycle, such as x3 ms to the UE, and the gNB will send data to the UE according to the new DRX long cycle of x3 ms, such as x3=320 ms. The UE may wake up to monitor the PDCCH according to the new DRX long cycle of 320 ms. With new DRX short cycle, UE may have lower power consumption.
[0095]
In another example, the transmission information associated with the go-to-sleep signal includes an index of DRX parameter sets. The gNB may send a go-to-sleep signal including the index of DRX parameter sets such as x4, to the UE. New DRX configuration parameters are determined from the index of DRX parameter sets and the DRX parameter sets. The DRX parameter sets may be predefined to include at least one of: a DRX HARQ RTT timer for DL, a DRX HARQ RTT timer for UL, a DRX inactivity timer, a DRX long cycle start offset, a DRX on-duration timer, a DRX retransmission timer for DL, a DRX retransmission timer for UL, a DRX short cycle timer, a DRX short cycle, a DRX slot offset. An example of DRX parameter sets is shown in Table 2. ‘X’ in Table 2 denotes undefined. If the index of DRX parameter sets is equal to 3, the DRX short cycle is equal to 16 ms, the DRX short cycle timer is equal to 10ms, the DRX on-duration timer is equal to 2 ms, the DRX inactivity timer is equal to 3 ms, the DRX long cycle is equal to 40 ms, and DRX retransmission timer for DL is equal to 4 ms.
[0096]
Table 2: An example for DRX parameter sets
[0097]
[0098]
In another example, the transmission information associated with the go-to-sleep signal includes at least one of: one or more DRX parameters, a BWP index, a slot offset threshold, a number of UE reception antennas, a number of UE transmission antennas, a PDCCH monitoring period, a secondary cell state. For example, the go-to-sleep signal may include DRX parameters and BWP index. For example, when a DRX short cycle of DRX parameters in the go-to-sleep signal is 320 ms, and the BWP index is 0, then the gNB transmits data to the UE according to the DRX operation of DRX short cycle of 320 ms and BWP index of 0.
[0099]
In another example, the transmission information associated with the go-to-sleep signal includes DRX parameters, BWP index, and a secondary cell state. For example, when DRX on-duration timer of DRX parameters in the go-to-sleep signal is 4 ms, the BWP index is 0, and secondary cell state is ‘off’ then the gNB transmits data to the UE according to the DRX operation with DRX on-duration timer of 4 ms, BWP index of 0. The gNB may not transmitted data or reference signal on secondary cell to the UE.
[0100]
In another example, the transmission information associated with the go-to-sleep signal includes one or more DRX parameters, a BWP index, a slot offset threshold, and secondary cell state. For example, when DRX inactivity timer of DRX parameters in the go-to-sleep signal is 3 ms, the BWP index is 1, slot offset threshold is 2, and secondary cell state is ‘off’ then the gNB transmits data to the UE according to the DRX operation with DRX on-duration timer of 4 ms, BWP index of 0. The gNB will not transmit data or reference signal on secondary cell to the UE. Meanwhile, gNB will transmit data or a reference signal on a primary cell to the UE with the minimum slot offset of 2 slots.
[0101]
In another example, the transmission information associated with the go-to-sleep signal includes a number of UE reception antennas, and a number of UE transmission antennas. For example, when the number of UE reception antennas in the go-to-sleep signal is 2, the number of UE transmission antennas is 4, then after the UE receives the go-to-sleep signal, the UE receives data from gNB via 2 reception antennas and sends data to the gNB via 4 transmission antennas.
[0102]
In another example, the go-to-sleep signal is transmitted on PDCCH with a scrambling method of power saving RNTI. In another example, the go-to-sleep signal is defined by a DCI.
[0103]
In the UE, as in FIG. 4B, the configuration signaling received at 430 is a configuration of go-to-sleep signal. The configuration of go-to-sleep signal consists of one or more of: a number of nonactive DRX cycles, a number of nonactive slots, a number of nonactive millisecond, a DRX short cycle, a DRX long cycle, an index of DRX parameter sets. The go-to-sleep signal in Example 3 can be used as the parameters received at 430 for the UE in FIG. 4B.
[0104]
Example 4
[0105]
In this implementation for gNB, the configuration signaling transmitted at 410 include at least one of a wake-up signal or a go-to-sleep signal. Whether the wake-up signal or the go-to-sleep signal is configured or transmitted to the UE is based on a determination of whether the one or more of the parameters satisfy a condition. The condition may vary depending on the parameters. The parameters are the transmission information associated with the configuration signaling. Such as, the parameters include at least one of: DRX parameters, time domain parameters, BWP parameters, a state of UE, a number of MIMO parameters, UE assistant information, RNTI parameters.
[0106]
For example, the condition may include DRX parameters including a DRX short cycle. Based on the determination of the condition, the gNB sends a wake-up signal or a go-to-sleep signal to the UE. For example, if the DRX short cycle of DRX parameters is configured, the wake-up signal is transmitted to the UE; otherwise, the go-to-sleep signal is transmitted to the UE. In another example, the DRX parameters include a DRX long cycle. If the DRX long cycle is configured, the go-to-sleep signal is transmitted to the UE; otherwise, the wake-up signal is transmitted to the UE.
[0107]
In another example, the condition may include time domain parameters. Time domain parameters include a slot offset. Based on the determination of the condition, the gNB may send a wake-up signal or a go-to-sleep signal to the UE. For example, if the slot offset of the time domain parameters is larger than 2, the wake-up signal is transmitted to the UE; otherwise, the go-to-sleep signal is transmitted to the UE.
[0108]
In an implementation at the UE, as in FIG. 4B, the configuration signaling received at 430 include at least one of a wake-up signal or a go-to-sleep signal. Whether the wake-up signal or the go-to-sleep signal is received by the UE is based on the determination of whether the one or more parameters satisfy a condition. The condition may vary depending on the parameters. The parameters are the transmission information associated with the configuration signaling. Such as, the parameters include one or more of: DRX parameters, time domain parameters, BWP parameters, a state of the UE, a number of MIMO parameter, UE assistant information, RNTI parameter. For example, the condition may include DRX parameters including a DRX short cycle. For a example, if the DRX short cycle is configured, the UE detects and receives the wake-up signal; otherwise, the UE detects and receives the go-to-sleep signal. In another example, the DRX parameters include a DRX long cycle. If the DRX long cycle is configured, the UE detects and receives the go-to-sleep signal; otherwise, the UE detects and receives the wake-up signal. The wake-up signal or the go-to-sleep signal are defined in Example 4 and can be used as the configuration signaling received at 430 for UE in FIG. 4B.
[0109]
Example 5
[0110]
In an implementation at a gNB, the configuration signaling transmitted at 410 include a configuration of activation/de-activation configuration of carrier aggregation/dual connectivity (CA/DC) . The configuration of activation/de-activation of carrier aggregation/dual connectivity (CA/DC) is determined by scheduling DCI. The scheduling DCI may include one or more of: DCI format0_0, DCI format0_1, DCI format1_0, DCI format1_1. Since the HARQ (Acknowledgement/Negative Acknowledgment, ACK/NACK) is reported to the gNB for PDSCH which is scheduled by scheduling DCI, the UE and the gNB have the same understanding for the state of CA/DC. Therefore, unnecessary power consumption for misunderstanding the CA/DC state can be avoided.
[0111]
In an implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include a configuration of activation/de-activation configuration of CA/DC. The configuration of activation/de-activation configuration of CA/DC may be determined by scheduling DCI. The scheduling DCI may include one or more of: DCI format0_0, DCI format0_1, DCI format1_0, DCI format1_1. Since the HARQ (ACK/NACK) must be reported to the gNB for PDSCH which is scheduled by scheduling DCI, the UE and gNB have the same understanding for state of CA/DC. Therefore, the unnecessary power consumption for misunderstanding the CA/DC state can be avoided.
[0112]
Example 6
[0113]
In an implementation for gNB, the configuration signaling transmitted at 410 includes a configuration of reference signal. Whether the reference signal is configured or transmitted to the UE is based on the determination whether the one or more parameters satisfy a condition. The condition may vary depending on the parameters. The parameters are the transmission information associated with the configuration signaling. Such as, the parameters include on or more of: a current BWP index and a new BWP index. For example, if the overlap of bandwidth of current BWP index and bandwidth of the new BWP index is larger than 0, the reference signal is not configured. Since there is overlap of bandwidth of current BWP index and bandwidth of the new BWP index, the large scale channel information need not measure for UE and power saving can be obtained. Otherwise, a reference signal is configured for UE channel tracking or measurement. In some example embodiments, the reference signal is a tracking reference signal. If the reference signal is configured, the reference signal is a power saving signal, such as a wake-up signal or a go-to-sleep signal.
[0114]
In an implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include a reference signal. Whether the reference signal is received by the UE is based on the determination whether the one or more parameters satisfy a condition. The condition may vary depending on the parameters. The parameters are the transmission information associated with the configuration signaling. Such as, the parameters include at least one of: a current BWP index and a new BWP index. For example, if an overlap of bandwidth of a current BWP index and a bandwidth of a new BWP index is larger than 0, then a reference signal is not detected or received by UE. Otherwise, the UE detects and receives the reference signal for channel tracking or measurement. In some example embodiments, the reference signal is a tracking reference signal. If the reference signal is configured, the reference signal is a power saving signal, such as a wake-up signal or a go-to-sleep signal.
[0115]
Example 7
[0116]
In an implementation for the gNB, the configuration signaling transmitted at 410 include search space parameters and DRX parameters. The transmission information associated with the search space parameters includes a PDCCH monitoring slot periodicity. And, the transmission information associated with the DRX parameters include an on-duration timer and an inactivity timer. The PDCCH monitoring slot periodicity may be determined by the DRX on-duration state and the DRX inactivity state. The PDCCH monitoring slot periodicity of the DRX inactivity state is y0 times of the PDCCH monitoring slot periodicity of DRX on-duration state. The PDCCH monitoring slot periodicity of DRX on-duration state is equal to configured PDCCH monitoring slot periodicity. The value of y0 may be an integer larger than 1, such as y0 is equal to 2, 3, 4, 6, 8, 12, 16 or 32. For example, if the PDCCH monitoring slot periodicity is configured as 4 slots, then the PDCCH monitoring slot periodicity of the DRX on-duration state is 4 slots and the PDCCH monitoring slot periodicity of the DRX inactivity state is 8 slots when y0 is equal to 2. FIG. 8 shows an example where the PDCCH monitoring slot periodicity 810 of DRX on-duration state 840 is 4 slots, the PDCCH monitoring slot periodicity 830 of DRX inactivity state 850 is 8 slots. At 820 in FIG. 8, a PDSCH is scheduled (or gNB transmits the data to UE) . Then, a DRX inactivity timer 850 is activated, where the UE may monitor the PDCCH according to the PDCCH monitoring slot periodicity with 8 slots.
[0117]
In another example, the PDCCH monitoring slot periodicity of DRX on-duration state is y1 times of the PDCCH monitoring slot periodicity of the DRX inactivity state. The PDCCH monitoring slot periodicity of DRX inactivity state may be equal to configured PDCCH monitoring slot periodicity. The value of y1 may be an integer larger than 1, such as y1 is equal to 2, 3, 4, 6, 8, 12, 16 or 32. For example, if the PDCCH monitoring slot periodicity is configured to be equal to 8 slots, the PDCCH monitoring slot periodicity of the DRX inactivity state may be 8 slots and the PDCCH monitoring slot periodicity of the DRX on-duration state may be 16 slots when y1 is equal to 2.
[0118]
In another example, the search space includes a PDCCH monitoring slot periodicity, and the DRX parameters include a DRX cycle. If the DRX short cycle is configured, the DRX cycle is equal to the DRX short cycle. Otherwise, the DRX cycle is equal to the DRX long cycle. The minimum value of the PDCCH monitoring slot periodicity and the DRX cycle for a primary cell may be m0, and the minimum value of PDCCH monitoring slot periodicity and DRX cycle for secondary cell may be m1, and m1 may be larger than m0. For example, m1 may be y2 times m0. The value of y2 may be an integer larger than 1, such as y2 is equal to 2, 3, 4, 6, 8, or 12.
[0119]
In an implementation for a UE, as in FIG. 4B, the parameters received at 430 include at least a search space and DRX parameters. The search space includes PDCCH monitoring slot periodicity, and the DRX parameters at least include an on-duration timer and an inactivity timer. The PDCCH monitoring slot periodicity is determined by the DRX on-duration state and the DRX inactivity state. The PDCCH monitoring slot periodicity of the DRX inactivity state may be y0 times the PDCCH monitoring slot periodicity of the DRX on-duration state. The PDCCH monitoring slot periodicity of the DRX on-duration state may be equal to the configured PDCCH monitoring slot periodicity. The value of y0 may be an integer larger than 1, such as y0 is equal to 2, 3, 4, 6, 8, 12, 16 or 32. For example, if the PDCCH monitoring slot periodicity is configured as 4 slots, then the PDCCH monitoring slot periodicity of DRX on-duration state is 4 slots and the PDCCH monitoring slot periodicity of the DRX inactivity state is 8 slots when y0 is equal to 2. In another example, the PDCCH monitoring slot periodicity of the DRX on-duration state is y1 times the PDCCH monitoring slot periodicity of DRX inactivity state. The PDCCH monitoring slot periodicity of the DRX inactivity state may be equal to the configured PDCCH monitoring slot periodicity. The value of y1 may be an integer larger than 1, such as y1 is equal to 2, 3, 4, 6, 8, 12, 16 or 32. For example, if the PDCCH monitoring slot periodicity is configured equal to 8 slots, the PDCCH monitoring slot periodicity of the DRX inactivity state is 8 slot and the PDCCH monitoring slot periodicity of DRX on-duration state is 16 slots when y1 is equal to 2.
[0120]
Example 8
[0121]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes at least one of a configuration of wake-up signal and a configuration of go-to-sleep signal. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include at least one of a configuration of wake-up signal or a configuration of go-to-sleep signal. The corresponding signal includes at least one of a wake-up signal and a go-to-sleep signal. In general, the UE monitors the PDCCH according to a predetermined period to determine whether the gNB schedules its own data transmission, reception, and measurement reporting of information. However, monitoring of the PDCCH only (without granted or scheduled) consumes more power at the UE. The UE monitors the PDCCH according to a period. If no scheduling information is detected, the UE can enter the inactive mode (or off-duration state) in the DRX mode and UE can go to sleep for lower power consumption.
[0122]
In some example embodiments of the disclosed method, before each potential PDCCH monitoring point, the gNB sends a signal (or DCI) to indicate whether the UE needs to monitor the PDCCH at the associated PDCCH monitoring point. The signal may be called a power saving signal. The power saving signal can be based on a sequence (or signal) which is abbreviated as WUS (wake-up signal) . The power saving signal can be based on a PDCCH which is abbreviated as WUP (wake-up PDCCH) , or based on a DCI which is abbreviated as WUD (wake-up DCI) . The sequence is defined by one of: reference signal for tracking, CSI-RS type reference signal, secondary synchronization signal, primary synchronization signal, Demodulation reference signal. If the signal is detected (or indicates “1” ) , the PDCCH is monitored at a potential PDCCH monitoring point. If the signal is not detected (or indicates “0” ) , the UE monitoring result is DTX where the PDCCH is not monitored at the PDCCH monitoring point. The wake-up signal based on a sequence can be called a WUS. The wake-up signal based on a downlink control information (DCI) can be called as WUD. Since the DCI is transmitted on PDCCH, it can also be called as WUP. Without special statements, the WUS can also be a WUD or a WUP.
[0123]
The foregoing wake-up mechanism can have other implementations as well. For example, a base station may send a “go to sleep” signal (GTS) . If the GTS signal is detected, the UE does not monitor PDCCH at the potential PDCCH monitoring point. Otherwise, PDCCH monitoring is performed for the UE. It may also be a scheduling indication. If the UE detects that the indication of GTS is “0” , then PDCCH monitoring is performed at the potential PDCCH monitoring point. If the indication of GTS is “1” , PDCCH monitoring is not performed. In the foregoing, the WUS may be used, or the GTS, or a scheduling indication information.
[0124]
The foregoing wake-up mechanism can have other implementations as well. For example, a base station may send a wake-up signal on PDCCH (WUP) or a wake-up signal based on DCI (WUD) . If the WUP (or WUD) signal is detected, the UE monitors PDCCH at the potential PDCCH monitoring point. Otherwise, the UE monitoring result is DTX and PDCCH monitoring is not performed. It may also be a scheduling indication. If the UE detects that the indication is “1” by WUP (or WUD) , then PDCCH monitoring is performed at the potential PDCCH monitoring point. If the indication is “0” by WUP (or WUD) , PDCCH monitoring is not performed. The WUP signal includes at least one of following parameters: a indication of potential PDCCH monitoring, a duration of no potential PDCCH monitoring, parameters of search space, parameters of DRX, parameters of control resource set (CORESET) , parameters of BWP, and parameters of MIMO. The DCI or WUP is scrambled by a new type RNTI (or a power saving RNTI) . The power saving RNTI is defined in NR Release 16 or latter Releases.
[0125]
The duration of no potential PDCCH monitoring is a integer larger than 0 or equal to 0, and it is specified in slots or milliseconds. It is defined as that the duration of the PDCCH monitoring window in which UE is not required to monitor the PDCCH. It can be given in number of subframes.
[0126]
The parameters of search space consist of at least one of following parameters: search space type, PDCCH monitoring slot periodicity and offset, PDCCH monitoring slot duration, Number of PDCCH candidates per aggregation level, monitoring symbols within slot.
[0127]
The parameters of DRX (Discontinuous Reception) consist of at least one of following parameters: DRX ‘on duration’ timer, DRX inactivity timer, DRX re-transmission timer, DRX short cycle, DRX long cycle, DRX short cycle timer.
[0128]
The parameters of CORESET consist of at least one of following parameters: frequency domain resources, duration, interleaver size, control resource set Id.
[0129]
The parameters of BWP consist of at least one of following parameters: BWP index.
[0130]
The parameters of MIMO consist of at least one of following parameters: a number of UE receiving antennas, a number of UE transmitting antennas, a number of UE panels, a number of UE receiving layers, a number of UE transmitting layers.
[0131]
Using the above-mentioned wake-up mechanism, the UE can skip the PDCCH monitoring if it is not needed. The frequency range (or bandwidth) of the WUS may be selected to be narrower than that of the PDCCH for power saving. An compact DCI can be selected for WUD (WUP) whose power consumption is low. The monitoring method is based on a sequence or compact DCI with low complexity. Accordingly, one advantage of such embodiments is that the receiver power consumption is lower than that for PDCCH monitoring. In this way, reduction of power consumption can be achieved.
[0132]
This following scheme details an embodiment of the wake-up mechanism proposed above:
[0133]
If UE detects the wake-up signal (or the detected indication is “1” ) , then the UE should perform channel tracking and beam tracking (to Maintain time/frequency synchronization) , measure the reference signal and report the channel quantity state (CSI) to gNB according to a trigger state of WUS /WUP /WUD (or WUS trigger state, WUP trigger state, WUD trigger state) . The WUS described below can be one of: WUP, WUD. The wake-up signal can be described as power saving signal and it can be one of: power saving signal based on DCI, power saving signal based on PDCCH, power saving signal based on a sequence, . As shown in FIG. 10, for a UE, a wake-up signal is detected (the indication is “1” ) at 1020. According to the corresponding WUS trigger state, UE will measure the reference signal (such as CSI-RS, or tracking-RS) at 1030, and report the measurement results to gNB at 1040. Generally, the time and frequency resources that can be used by the UE to report CSI are controlled by the gNB. The measurement results (CSI) for WUS trigger state may consist of Channel Quality Indicator (CQI) , precoding matrix indicator (PMI) , CSI-RS resource indicator (CRI) , SS/PBCH Block Resource indicator (SSBRI) , layer indicator (LI) , rank indicator (RI) and/or L1-RSRP. For CQI, PMI, CRI, SSBRI, LI, RI, L1-RSRP, a UE is configured by higher layers with N≥1 Reporting Settings, M≥1 Resource Settings, and one list of trigger states (given by the higher layer parameters CSI-AperiodicTriggerStateList) . Each trigger state in CSI-AperiodicTriggerStateList contains a list of associated CSI-ReportConfigs indicating the Resource Set IDs for channel. The CSI-AperiodicTriggerStateList IE is used to configure the UE with a list of aperiodic trigger states. Each codepoint of the DCI field "CSI request" is associated with one trigger state. Upon reception of the value associated with a trigger state, the UE will perform measurement of CSI-RS (reference signals) and aperiodic reporting on L1 according to all entries in the associatedReportConfigInfoList for that trigger state. Each associatedReportConfigInfo in associatedReportConfigInfoList includes at least one of: reportConfigId, resourceSet, qcl-info, csi-SSB-ResourceSet, csi-IM-ResourcesForInterference, nzp-CSI-RS-ResourcesForInterference. The reportConfigId indicates one of the CSI-ReportConfig configured in CSI-MeasConfig. ResourceSet, is defined as NZP-CSI-RS-ResourceSet for channel measurements. And, the entry number in nzp-CSI-RS-ResourceSetList in the CSI-ResourceConfig indicated by resourcesForChannelMeasurement in the CSI-ReportConfig indicated by the reportConfigId. The qcl-info includes list of references to TCI-States for providing the QCL source and QCL type, and it includes at least one of: ServCellIndex, BWP-Id, NZP-CSI-RS-ResourceId, SSB-Index, qcl-Type. The csi-SSB-ResourceSet is defined for channel measurements. The entry number in csi-SSB-ResourceSetList in the CSI-ResourceConfig indicated by resourcesForChannelMeasurement in the CSI-ReportConfig indicated by reportConfigId. The csi-IM-ResourcesForInterference is defined for interference measurement. The entry number in csi-IM-ResourceSetList in the CSI-ResourceConfig indicated by csi-IM-ResourcesForInterference in the CSI-ReportConfig indicated by reportConfigId. The nzp-CSI-RS-ResourcesForInterference is defined for interference measurement. The entry number in nzp-CSI-RS-ResourceSetList in the CSI-ResourceConfig indicated by nzp-CSI-RS-ResourcesForInterference in the CSI-ReportConfig indicated by reportConfigId.
[0134]
For high-frequency or low-frequency operation, the UE needs to know the trigger state for a proper reception of the WUS. In the disclosed subject matter, the WUS's trigger state includes at least one of: a transmission configuration indicator information, and a report configuration identifier. The transmission configuration indicator information may include at least one of following parameter sets: Doppler shift, Doppler spread, average delay, delay spread; Doppler shift, Doppler spread; Doppler shift, average delay. A value of report slot offset is determined by the report configuration identifier. A value of aperiodic triggering offset is determined by CSI-RS resource set determined by the report configuration identifier.
[0135]
The report offset for WUS trigger state is defined as the offset between the reference slot and the slot in which the measurement results (such as CSI) is reported to gNB. When the field of report offset for WUS trigger state is absent, report offset for WUS trigger state is determined by subcarrer spacing. An example, when the field of report offset for WUS trigger state is absent the UE applies the value 1 when PUSCH SCS is 15/30KHz; 2 when PUSCH SCS is 60KHz and 3 when PUSCH SCS is 120KHz. The aperiodic triggering offset may be defined as the offset between the reference slot and the slot in which the CSI-RS resource set is transmitted. When the field (aperiodic triggering offset) is absent the UE applies the value of 0 or 1 for aperiodic triggering offset. The value of report offset and the value of aperiodic triggering offset may be specified in slots or subframes or milliseconds. The reference slot is determined by WUS parameters, such as WUS periodicity. A specific example, the reference slot is the slot the WUS signal is transmitted. When the trigger state is set to zero, no CSI is requested. The report offset is one value of a list of report slot offset and the list of report slot offset (reportSlotOffsetList) is defined in the information element of CSI-ReportConfig. Wherein, the values in the list of report slot offset include one or more of: 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048. The aperiodic triggering offset is one value of a set of aperiodic triggering offset (aperiodicTriggeringOffset) and the set of aperiodic triggering offset is defined in the information element of NZP-CSI-RS-ResourceSet. Wherein, the values in the set of aperiodic triggering offset include one or more of: 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048.
[0136]
The UE can determine the trigger state for WUS by one of the following methods:
[0137]
Method A
[0138]
In the disclosed subject matter, the UE may determine its trigger state for WUS through the DCI on PDCCH. The DCI received on the PDCCH may include the trigger state for WUS. For example, the DCI field "CSI request" is associated with a WUS trigger state. Upon reception of the value associated with a trigger state ( "CSI request" ) , the UE will perform a measurement of CSI-RS (reference signals) and aperiodic reporting on L1 signaling according to that trigger state. As shown in FIG. 11, at 1110 of slot 0, a trigger state for WUS is configured by the DCI (Such as the field of "CSI request" in DCI) . And, UE detects the WUS signal at 1120 of slot 8. If the WUS signal indicates “1” (or enable the CSI report or PDCCH monitoring or data grant scheduling) , then UE measures the reference signal at 1130 of slot 11 and reports the measurement results to gNB at 1140 of slot 14. The reference slot locates at the slot where the WUS signal is transmitted (at slot 8) , the value of report offset is equal to 3 slots and the value of aperiodic triggering offset is equal to 6 slots. After the slot 14, a DRX on-duration state starts. GNB may schedule a transmission starting on slot 15 and UE needs to monitor the PDCCH.
[0139]
Method B
[0140]
The UE can determine the trigger state for WUS by one of the following methods: the UE may determine its trigger state for WUS through the RRC configuration parameter. The RRC configuration parameter may include at least the information of trigger state for WUS. For examples, the RRC parameter "CSI request" may be associated with a trigger state for WUS. Upon reception of the value associated with a WUS trigger state, the UE will perform measurement of CSI-RS (reference signals) and aperiodic reporting on L1 signaling according to that trigger state. As shown in FIG. 12, at 1210, a trigger state for WUS is configured by the RRC information. And, UE detects the WUS signal at 1220 of slot 20. If the WUS signal indicates “1” (or enable the CSI report or PDCCH monitoring or data grant scheduling) , then UE measures the reference signal (RS) at 1230 of slot 21 and reports the measurement results to gNB at 1240 of slot 22. The UE monitors the PDCCH at 1250 of slot 23~25. The reference slot is located on the slot where the WUS signal is transmitted (at slot 20) , the value of report offset is equal to 1 slot and the value of aperiodic triggering offset is equal to 2. After the slot 22, a DRX on-duration state starts. Starting on slot 23, gNB may schedule a transmission and UE needs to monitor the PDCCH.
[0141]
Method C
[0142]
The UE may determine its trigger state for WUS through the configuration parameter of medium access control -control element (MAC-CE) . The MAC-CE configuration parameter may include at least the information of trigger state for WUS. For example, the information of "CSI request" may be associated with one trigger state. Upon reception of the value associated with a trigger state, the UE will perform measurement of CSI-RS (reference signals) and aperiodic reporting on L1 according to that trigger state.
[0143]
Example 9
[0144]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes at least one of a TRS configuration, a CSI-RS acquisition configuration, and a SSB configuration. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include at least one of a TRS configuration, a CSI-RS acquisition configuration, and a SSB configuration.
[0145]
In some example embodiments of the disclosed method, the transmission information associated with the SSB configuration comprises at least a SSB index. The information element (IE) of the SSB index (SSB-Index) identifies an SS-Block (synchronization signal (SS) /PBCH Block) within an SS-Burst (aburst of synchronization signal (SS) /PBCH Block (SSB) ) .
[0146]
In some example embodiments, the SSB configuration includes an associated SSB (named as associatedSSB) including one or more of: a SSB Index, or a sign of quasi co-located. With the configuration of the associated SSB, the UE may base the timing of the CSI-RS resource on the timing of the cell given by the cell ID of the CSI-RS resource configuration. Additionally, for a given CSI-RS resource, if the associated SS/PBCH block is configured but not detected by the UE, the UE may not monitor the corresponding CSI-RS resource. The sign of quasi co-located (such as isQuasiColocated) indicates whether the associated SS/PBCH block given by the associatedSSB and the CSI-RS resource (s) are quasi co-located with respect to [ 'QCL-TypeD' ] .
[0147]
In some another example embodiments of the disclosed method, the transmission information associated with the TRS configuration includes at least one of the following parameters: a nzp-CSI Resource Set Id, a nzp-CSI-RS Resources, a NZP-CSI-RS Resource Id, an aperiodic Triggering Offset, a TRS Information (trs-info) .
[0148]
In some example embodiments of the disclosed method, the transmission information associated with the CSI-RS acquisition configuration comprises at least one of following parameters: a nzp-CSI-ResourceSetId, a nzp-CSI-RS-Resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset.
[0149]
The nzp-CSI-RS-Resources include following parameters: nzp-CSI-RSResourceId, resourceMapping, powerControlOffset, powerControlOffsetSS, scramblingID, periodicityAndOffset, and qcl-InfoPeriodicCSI-RS
[0150]
Example 10
[0151]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 include a WUS configuration. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include at least one of a WUS configuration. In some example embodiments of the disclosed method, the transmission information associated with the WUS configuration includes: a WUS offset. The WUS offset is determined by a measured window configuration. The measured window configuration can be named as pre-wake-up window configuration or a preparation period. It includes a process of measuring the channel and reporting the channel states. In addition, it may also include channel tracking and beam tracking (for time/frequency synchronization) . The measured window configuration comprises at least following parameter: a duration. The WUS offset is determined by a measured window configuration. Such as, if the measured window configuration is configured, the WUS offset is larger than or equal to the duration in the measured window configuration. If the measured window configuration is not configured, the WUS offset in the WUS configuration is less than the duration in the measured window configuration, or the WUS offset in the WUS configuration is equal to zero, or the WUS offset in the WUS configuration is equal to 1. The WUS offset is defined as the time gap between a slot containing a WUS signal and a reference slot. The reference slot is defined as a slot where DRX on-duration starts, or the reference slot is a slot where PDCCH monitoring starts. FIG. 13 shows an example with DRX configured with a short DRX short cycle of 16 ms (16 slots) and on-duration timer of 4 ms (4 slots) . The duration of the measured window configuration is equal to 4 slots. In FIG. 13, the UE performs measurement and reporting at 1310 when the measured window configuration is configured, and the WUS offset is equal to 5 slots (equals to the duration of the measured window configuration plus 1) . At 1330, the measured window configuration is not configured, and the WUS offset is equal to 1 slots (such as, the WUS is on slot 20 and DRX “on-duration” state starts on slot 21) . The reference slot is the slot where DRX on-duration starts, such as at 1320. At 1340, because the WUS signal indicates “0” , the UE stays in sleep state and the gNB doesn’t perform data transmission, albeit that DRX “on-duration” state is activated.
[0152]
Similarly, FIG. 14 shows another example, the PDCCH monitoring period is configured with 16 slots and duration for PDCCH monitoring (number of consecutive slots that a search space lasts in every occasion) of 4 slots. The duration of the measured window configuration is equal to 4 slots. In FIG. 14, the UE performs measurement and reporting at 1410 when the measured window configuration is configured, and the WUS offset is equal to 5 slots (equals to the duration of the measured window configuration plus 1) . At 1430, the measured window configuration is not configured, and the WUS offset is equal to 1 slots (such as, the WUS is on slot 20 and PDCCH monitoring starts on slot 21) . The reference slot is the slot where PDCCH monitoring starts, such as at 1420. At 1440, because the WUS signal indicates “0” , the UE stays in sleep state for power saving and the gNB doesn’t perform data transmission.
[0153]
Example 11
[0154]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 include a configuration of a preparation period. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include a configuration of preparation period. In some example embodiments, the configuration of preparation period includes a TRS configuration, a CSI-RS acquisition configuration, a duration, and a SSB configuration. The configuration of preparation period can be named as pre-wake-up window configuration or measurement window configuration.
[0155]
The TRS configuration is defined as that at least the parameter of TRS information (trs-Info) in the set of Non-Zero-Power (NZP) CSI-RS resources is configured with “true” . The CSI-RS acquisition configuration is defined as that, the repetition in the set of Non-Zero-Power (NZP) CSI-RS resources is configured with “off” and TRS information (trs-Info) in the set of Non-Zero-Power (NZP) CSI-RS resources is configured with “false” , as well as CSI-RS-Resource-Mobility is not configured. The duration is defined as the number of slots of the measured window, during which UE can acquire and report the channel state information (CSI) . The SSB configuration includes a SSB index or associated SSB (named as associatedSSB, including one or more of: a SSB Index, or a sign of quasi co-located) . The set of Non-Zero-Power (NZP) CSI-RS resources may include at least one of following parameters: nzp-CSI-ResourceSetId, nzp-CSI-RS-Resources, repetition, aperiodicTriggeringOffset, trs-Info.
[0156]
An example, the corresponding signal includes at least one of WUS, WUP, or WUD) . When a WUS (or WUP or WUD) indicates “1” , the UE wakes up to detect /measure the channel and report the CSI based on configuration of preparation period. When a WUS (or WUP or WUD) indicates “0” , the UE stay in sleep state for reduction of power consumption.
[0157]
Example 12
[0158]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 include a configuration of a preparation period (or measured window configuration) . In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 include a configuration of preparation period. In some example embodiments, the transmission information associated with the configuration of preparation period includes a list of aperiodic trigger states (CSI-AperiodicTriggerStateList) .
[0159]
One or more aperiodic trigger states are defined in the list of aperiodic trigger states. The aperiodic trigger state includes one or more of: a slot offset of resource set, a report slot offset. The slot offset of resource set in the list of aperiodic trigger states is the time gap between a slot containing a reference signal and a reference slot. And, the reference slot is a slot where DRX on-duration starts, or the reference slot is a slot where PDCCH monitoring starts, or the reference slot is a slot containing SSB reference signal. The reference signal is CSI-RS reference signal or SSB reference signal. The report slot offset is a timing offset for aperiodic reporting using PUSCH. This field lists the allowed offset values. A particular value of the report slot offset can be indicated in DCI. The network indicates in the DCI field of the UL grant, which of the configured report slot offsets the UE shall apply. In the list of aperiodic trigger states (CSI-AperiodicTriggerStateList) , the CSI RS resource set (or SSB resourse) configuration and the CSI report configuration are defined.
[0160]
An example, when a WUS (or WUP or WUD) indicates “1” , the UE wakes up to detect /measure the channel and report the CSI based on the transmission information associated with the preparation period. And, the UE continues monitoring PDCCH and receiving data from gNB /sending data to gNB. When a WUS (or WUP or WUD) indicates “0” , the UE stay in sleep state for reduction of power consumption.
[0161]
Example 13
[0162]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes a WUS trigger state. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 includes a WUS trigger state. In some example embodiments of the disclosed method, the transmission information associated with the WUS trigger state includes at least one of following parameters: a transmission configuration indicator information, and a report configuration identifier. The WUS trigger state is enabled by at least one of: a RRC signaling, a MAC-CE signaling or a DCI signaling. The transmission configuration indicator information described above, at least with respect to the spatial reception information, may include at least one of the following parameter sets: Doppler shift, Doppler spread, average delay, delay spread; Doppler shift, Doppler spread; Doppler shift, average delay. A CSI RS resource set (or SSB resource) configuration and the CSI report configuration are determined by the report configuration identifier. With the transmission configuration indicator information and the CSI RS resource set, a UE can measure the channel accurately.
[0163]
An example, when a WUS (or WUP) indicates “1” , the UE wakes up to detect /measure the channel (channel tracking, beam tracking, time/frequency synchronization, and CSI acquisition) and report the CSI based on the transmission information associated with the WUS trigger state. And, the UE continues monitoring PDCCH and receiving data from gNB /sending data to gNB. When a WUS (or WUP) indicates “0” , the UE stay in sleep state for reduction of power consumption. An example, the UE receives the signaling from RRC (RRC signaling) and it is configured with a WUS trigger state in RRC signaling. An example, the UE receives the signaling from MAC-CE (MAC-CE signaling) and the UE is configured with a WUS trigger state in MAC-CE signaling. An example, the UE receives the signaling from DCI (DCI signaling) and the UE is configured with a WUS trigger state in DCI signaling.
[0164]
Example 14
[0165]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes a wake-up signal. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 includes a wake-up signal. In some example embodiments of the disclosed method, the transmission information associated with the wake-up signal includes at least one of following parameters: a WUS trigger state. The WUS trigger state includes at least one of following parameters: a transmission configuration indicator information, and a report configuration identifier. The WUS trigger state is enabled by at least one of: a RRC signaling, a MAC-CE signaling or a DCI signaling. The transmission configuration indicator information described above, at least with respect to the spatial reception information, may include at least one of the following parameter sets: Doppler shift, Doppler spread, average delay, delay spread; Doppler shift, Doppler spread; Doppler shift, average delay. A CSI RS resource set (or SSB resourse) configuration and the CSI report configuration are determined by the report configuration identifier. With the transmission configuration indicator information and the CSI RS resource set, a UE can measure the channel accurately.
[0166]
An example, when a WUS (or WUP) indicates “1” , the UE wakes up to detect / measure the channel (channel tracking, beam tracking, time/frequency synchronization, and CSI acquisition) and report the CSI based on the transmission information associated with the WUS trigger state. And, the UE continues monitoring PDCCH and receiving data from gNB /sending data to gNB. When a WUS (or WUP) indicates “0” , the UE stay in sleep state for reduction of power consumption. An example, the UE receives the signaling from RRC (RRC signaling) and it is configured with a WUS trigger state in RRC signaling. An example, the UE receives the signaling from MAC-CE (MAC-CE signaling) and the UE is configured with a WUS trigger state in MAC-CE signaling. An example, the UE receives the signaling from DCI (DCI signaling) and the UE is configured with a WUS trigger state in DCI signaling.
[0167]
Example 15
[0168]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes a configuration of power saving signal based on PDCCH, a configuration of power saving signal based on a sequence, and a configuration of preparation period. In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 includes a configuration of power saving signal based on PDCCH, a configuration of power saving signal based on a sequence, and a configuration of preparation period. Which configuration signaling is transmitted to UE (or received by UE) is based on the determination whether a predefined resource set satisfy a condition. The predefined resource set includes at least one of: a frequency range, BWP index, type of RNTI, DRX parameter. Such as, if the frequency range is FR1, the configuration signaling is configuration of power saving signal based on PDCCH (and the corresponding signal is power saving signal based on PDCCH) or a configuration of power saving signal based on a sequence (and the corresponding signal is power saving signal based on a sequence) ; if the frequency range is FR2, the configuration signaling is configuration of preparation period. For the WUP (power saving signal based on PDCCH or wake-up PDCCH) signal, a compact DCI on PDCCH is used to indicate whether the UE wakes up or goes to sleep for power saving. The preparation period is defined the same as measured window configuration in Example 10 or Example 11 or Example 12. FR1 is defined as the frequency range 1 for carrier frequency smaller than 6 GHz or sub-6 GHz, and FR2 is defined as the frequency range 2 for carrier frequency larger than 6 GHz. Sub 6 Ghz range is called FR1 and millimeter wave range is called FR2, and the table below shows a specific definition of frequency ranges.
[0169]
Definition of frequency ranges
[0170]
[Table 0001]
Frequency range designation Corresponding frequency range
FR1 450 MHz –6000 MHz
FR2 24250 MHz –52600 MHz

[0171]
An example, when a UE’s frequency range is FR1 and a WUS (or WUP) indicates “1” , the UE wakes up to detect /measure the channel and report the CSI. And, the UE continues monitoring PDCCH and receiving data from gNB /sending data to gNB. When a WUS (or WUP) indicates “0” , the UE stay in sleep state for reduction of power consumption. Another example, when a UE’s frequency range is FR2 and a pre-wake-up window configuration is configured, the UE wakes up to detect /measure the channel and report the CSI at on-duration state. And, the UE continues monitoring PDCCH and receiving data from gNB /sending data to gNB.
[0172]
Another example, if the BWP index is equal to 0 or 1, then the UE is configured as configuration of power saving signal based on PDCCH (and the corresponding signal can be power saving signal based on PDCCH) or a configuration of power saving signal based on a sequence (and the corresponding signal can be power saving signal based on a sequence) ; otherwise, the configuration signaling is configuration of preparation period.
[0173]
Another example, when the type of RNTI is MCS-C-RNTI or a new type RNTI (power saving RNTI) , then the UE is configured as configuration of power saving signal based on PDCCH (and the corresponding signal can be power saving signal based on PDCCH) or a configuration of power saving signal based on a sequence (and the corresponding signal can be power saving signal based on a sequence) ; otherwise, the configuration signaling is configuration of preparation period.
[0174]
Another example, when a DRX cycle of the DRX parameter is larger than a threshold value, then the UE is configured as configuration of power saving signal based on PDCCH (and the corresponding signal can be power saving signal based on PDCCH) or a configuration of power saving signal based on a sequence (and the corresponding signal can be power saving signal based on a sequence) ; otherwise, the configuration signaling is configuration of preparation period. The threshold value can be one of: 40, 80, 160, 320, 640.
[0175]
Example 16
[0176]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes one of: a SSB index, a configuration of SSS, a configuration of PSS, a configuration of TRS, a configuration of DMRS, a configuration of SRS. And, the corresponding signal transmitted at 420 at least includes periodic signal, which at least includes one of: synchronization signal block (SSB) , secondary synchronization signal (SSS) , primary synchronization signal (PSS) , tracking reference signal (TRS) , demodulation reference signal (DMRS) , sounding reference signal (SRS) . The periodic signal is used for at least one of: RRM measurement, coarse synchronization, coarse beam information, channel tracking, CSI measurements, and beam tracking. Since the periodic signal has long periodicity, it may have very low power consumption for UE. If there is not data granted or PDSCH scheduled for UE, the UE just detects the periodic signal and the UE can reduce most of power consumption. The SSB index (SSB-Index) identifies an SS-Block (synchronization signal (SS) /PBCH Block) within an SS-Burst (aburst of synchronization signal (SS) /PBCH Block (SSB) ) . In another implementation for the UE, as in FIG. 4B, the configuration signaling received at 430 includes one of: a SSB index, a configuration of SSS, a configuration of PSS, a configuration of TRS, a configuration of DMRS, a configuration of SRS. And, the corresponding signal received at 440 at least includes periodic signal, which at least includes one of: synchronization signal block (SSB) , secondary synchronization signal (SSS) , primary synchronization signal (PSS) , tracking reference signal (TRS) , demodulation reference signal (DMRS) , sounding reference signal (SRS) . The configuration signaling at least includes a cycle of the corresponding signal, and wherein the cycle of the corresponding signal is equal to one of: DRX cycle, a value of DRX cycle multiplied by N1, a value of DRX cycle divided by N2, and N3 milliseconds. wherein, N1 is a positive integer larger than 1, N2 is a positive integer larger than 1, and N3 a positive integer. As an example, the DRX cycle is 64 milliseconds, and the cycle of the corresponding signal is 64 milliseconds (is equal to DRX cycle) , 128 milliseconds (is equal to a value of DRX cycle multiplied by N1 and N1 is 2) , 16 milliseconds (is equal to a value of DRX cycle divided by N2 and N2 is 4) , or 320 milliseconds (is equal to N3 and N3 is 320) .
[0177]
Another example, as shown in FIG. 15, the DRX cycle is 40 milliseconds and the cycle of the corresponding signal is equal to 40 milliseconds. At 1510, a configuration signaling including SSB index (or a configuration of PSS, or a configuration of SSS) is transmitted, and the corresponding signal of PSS or SSS is transmitted at 1520, 1540 and 1560. UE should monitor the PDCCH at DRX on-duration of 1530 and 1550.
[0178]
Another example, the configuration signaling can comprises an associated SSB, and the associated SSB includes one or more of: a SSB index or a sign of quasi co-located. If the sign of quasi co-located is present, the UE may base the timing of the CSI-RS resource indicated in CSI-RS-Resource-Mobility on the timing of the cell indicated by the cellId in the CSI-RS-CellMobility. In this case, the UE is not required to monitor that CSI-RS resource if the UE cannot detect the SS/PBCH block indicated by this associatedSSB and cellId. If the sign of quasi co-located is absent, the UE shall base the timing of the CSI-RS resource indicated in CSI-RS-Resource-Mobility on the timing of the serving cell indicated by refServCellIndex. In this case, the UE is required to measure the CSI-RS resource even if SS/PBCH block (s) with cellId in the CSI-RS-CellMobility are not detected.
[0179]
The synchronization signal block (SSB) is transmitted on a set of time/frequency resources (resource elements) within the basic OFDM grid. The SS block spans four OFDM symbols in the time domain and 240 subcarriers in the frequency domain. The PSS is transmitted in the first OFDM symbol of the SS block and occupies 127 subcarriers in the frequency domain. The remaining subcarriers are empty. The SSS is transmitted in the third OFDM symbol of the SS block and occupies the same set of subcarriers as the PSS. There are eight and nine empty subcarriers on each side of the SSS. The PBCH is transmitted within the second and fourth OFDM symbols of the SS block. In addition, PBCH transmission also uses 48 subcarriers on each side of the SSS. The total number of resource elements used for PBCH transmission per SS block thus equals 576. Note that this includes resource elements for the PBCH itself but also resource elements for the demodulation reference signals (DMRS) needed for coherent demodulation of the PBCH.
[0180]
For configuration of PSS, it may includes at least one of: cycle, slot offset, system information. The PSS extends over 127 resource elements onto which a PSS sequence {x n} = x n (0) , x n (1) , ..., x n (126) is mapped. There are three different PSS sequences {x 0} , {x 1} , and {x 2} , derived as different cyclic shifts of a basic length-127 M-sequence {x} = x (0) , x (1) , ..., x (126) generated according to the recursive formula:
[0181]
By applying different cyclic shifts to the basic M-sequence x (n) , three different PSS sequences x 0 (n) , x 1 (n) , and x 2 (n) can be generated according to:
[0182]
x 0 (n) = x (n) ;
[0183]
x 1 (n) = x (n+43 mod 127) ;
[0184]
x 2 (n) = x (n+86 mod 127)
[0185]
For configuration of SSS, it may includes at least one of: cycle, slot offset, system information. The basic structure of the SSS is the same as that of the PSS, that is, the SSS consists of 127 subcarriers to which an SSS sequence is applied. On an even more detailed level, each SSS is derived from two basic Msequences generated according to the recursive formulas
[0186]
[0187]
[0188]
The actual SSS sequence is then derived by adding the two M sequences together, with different shifts being applied to the two sequences
[0189]
[0190]
Due to oscillator imperfections, the UE must track and compensate for variations in time and frequency to successfully receive downlink transmissions. To assist the UE in this task, a tracking reference signal (TRS) can be configured. The TRS is not a CSI-RS. Rather a TRS is a resource set consisting of multiple periodic NZP-CSI-RS. More specifically a TRS consists of four one-port, density-3 CSI-RS located within two consecutive slots. The CRS-RS within the resource set, and thus also the TRS in itself, can be configured with a periodicity of 10, 20, 40, or 80 ms. Note that the exact set of resource elements (subcarriers and OFDM symbols) used for the TRS CSI-RS may vary. There is always a four-symbol time-domain separation between the two CSI-RS within a slot though. This time domain separation sets the limit for the frequency error that can be tracked. Likewise, the frequency-domain separation (four subcarriers) sets the limit for the timing error that can be tracked.
[0191]
For demodulation reference signal (DMRS) , two main time-domain structures are supported, differencing in the location of the first DM-RS symbol: Mapping type A, where the first DM-RS is located in symbol 2 or 3 of the slot and the DM-RS is mapped relative to the start of the slot boundary, regardless of where in the slot the actual data transmission starts. This mapping type is primarily intended for the case where the data occupy (most of) a slot. The reason for symbol 2 or 3 in the downlink is to locate the first DM-RS occasion after a CORESET located at the beginning of a slot. Mapping type B, where the first DM-RS is located in the first symbol of the data allocation, that is, the DM-RS location is not given relative to the slot boundary but rather relative to where the data are located. This mapping is originally motivated by transmissions over a small fraction of the slot to support very low latency and other transmissions that benefit from not waiting until a slot boundary starts but can be used regardless of the transmission duration.
[0192]
For sounding reference signal (SRS) , it can be located somewhere within the last six symbols of a slot. In the frequency domain, an SRS has a so-called “comb” structure, implying that an SRS is transmitted on every Nth subcarrier where N can take the values two or four ( “comb-2” and “comb-4, ” respectively) . SRS transmissions from different UEs can be frequency multiplexed within the same frequency range by being assigned different combs corresponding to different frequency offsets. For comb-2, that is, when SRS is transmitted on every second subcarrier, two SRS can be frequency multiplexed. In the case of comb-4, up to four SRS can be frequency multiplexed.
[0193]
Example 17
[0194]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes one or more of: TRS configuration, a L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration. For the TRS configuration, the configuration parameters of NZP-CSI-RS-ResourceSet includes: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, a TRS information parameter. For the L1-RSRP computation configuration, the configuration parameters of NZP-CSI-RS-ResourceSet includes: a nzp-CSI-ResourceSetId, a nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, a repetition parameter. For the mobility management configuration, the configuration parameters of NZP-CSI-RS-ResourceSet includes: a nzp-CSI resource set identifier, a nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, and a CSI-RS resource mobility is configured. For the CSI-RS acquisition configuration, the configuration parameters of NZP-CSI-RS-ResourceSet includes one or more of: a nzp-CSI-ResourceSetId, a NZP-CSI-RS-ResourceId, and an aperiodicTriggeringOffset. Wherein, the NZP-CSI-RS-ResourceId is used to identify one NZP-CSI-RS-Resourceset; the NZP-CSI-RS-ResourceId is used to identify one NZP-CSI-RS-Resource; the repetition parameter indicates whether repetition is on/off. If the field is set to 'OFF' or if the field is absent, the UE may not assume that the NZP-CSI-RS resources within the resource set are transmitted with the same downlink spatial domain transmission filter and with same NrofPorts in every symbol; the TRS information parameter indicates that the antenna port for all NZP-CSI-RS resources in the CSI-RS resource set is same. If the field is absent or released the UE applies the value "false" . The preparation period is only for the case there is data granted or PDSCH scheduled for UE. If there is not data granted or PDSCH scheduled for UE, the UE doesn’t need to detect the preparation period and the UE can reduce most of power consumption.
[0195]
And, the configuration signaling at 420 includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a CSI resource offset, wherein the CSI resource offset (can be called as aperiodic triggering offset) is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts, the slot where PDCCH monitoring starts, the slot where CSI report is transmitted, the slot where the corresponding signal is transmitted. For example, the reference slot is the slot (at slot 15) where DRX on-duration starts when DRX operation is configured and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the CSI resource offset is equal to 5 slots. Another example, when for DRX operation is not configured, the reference slot is the slot (at slot 18) where PDCCH monitoring starts (the PDCCH monitoring periodicity and offset are configured by the search space) and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the CSI resource offset is equal to 8 slots. Another example, the reference slot is the slot (at slot 5) where CSI-RS resource set is transmitted and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the CSI resource offset is equal to 5 slots. Another example, the reference slot is the slot (at slot 5) where the corresponding signal is transmitted and the slot in which a CSI-RS resource set is transmitted locates at slot 8, then the CSI resource offset is equal to 3 slots. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH.
[0196]
And, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a report slot offset, wherein the report slot offset is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts, the slot where PDCCH monitoring starts, the slot where CSI-RS resource set is transmitted, the slot where the corresponding signal is transmitted. For example, the reference slot is the slot (at slot 15) where DRX on-duration starts when DRX operation is configured and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 5 slots. Another example, when for DRX operation is not configured, the reference slot is the slot (at slot 18) where PDCCH monitoring starts (the PDCCH monitoring periodicity and offset are configured by the seach space) and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 8 slots. Another example, the reference slot is the slot (at slot 5) where CSI-RS resource set is transmitted and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 5 slots. Another example, the reference slot is the slot (at slot 5) where the corresponding signal is transmitted and the slot containing a CSI report locates at slot 8, then the report slot offset is equal to 3 slots. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH.
[0197]
An example, the report slot offset is one value of a list of report slot offset and the list of report slot offset (reportSlotOffsetList) is defined in the information element of CSI-ReportConfig. Wherein, the values in the list of report slot offset include one or more of: 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048. The aperiodic triggering offset is one value of a set of aperiodic triggering offset (aperiodicTriggeringOffset) and the set of aperiodic triggering offset is defined in the information element of NZP-CSI-RS-ResourceSet. Wherein, the values in the set of aperiodic triggering offset include one or more of: 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048.
[0198]
An example, when the configuration signaling to define a preparation period is not configured (or the configuration of the preparation period is not set or defined) , then the slot offset between the slot in which the corresponding signal is transmitted and a reference slot is equal to 1 or 0, wherein the reference slot is one of: the slot where DRX on-duration starts, in case the DRX operation is configured; the slot where PDCCH monitoring starts, in case the DRX operation is not configured. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH.
[0199]
Another example, the configuration signaling to define the preparation period is determined by at least one of: a RRC signaling (or RRC configuration) , a MAC-CE signaling (or MAC-CE configuration) , a DCI signaling (or DCI configuration) . More specifically, the configuration signaling to define a preparation period is determined by one of: scheme 1: combination of a RRC signaling and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the DCI signaling; scheme 2: combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, M configurations of preparation periods in N configurations of preparation periods are defined by the MAC-CE signaling, and a configuration of preparation period in M configurations of preparation periods is determined by the DCI signaling; scheme 3: combination of a RRC signaling and a MAC-CE signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the MAC-CE signaling; scheme 4: a RRC signaling, wherein a configuration of preparation period is determined by the RRC signaling; wherein, N is a positive integer, M is a integer smaller than or equal to N. An example, N is equal to 16 and M is equal to 8, or N is equal to 32 and M is equal to 8, or N is equal to 64 and M is equal to 16, or N is equal to 8 and M is equal to 4. And, the DCI signaling is transmitted on the power saving signal based on PDCCH.
[0200]
And, the corresponding signal is a power saving signal based on PDCCH, wherein the power saving signal can be used to wake up a UE and trigger a preparation period. The power saving signal based on PDCCH may also include at least one of: CSI request, Bandwidth part indicator, antenna port, DMRS sequence initialization, Carrier indicator, SRS request, SS/PBCH index. Or, the corresponding signal is a power saving signal based on a sequence, wherein the power saving signal can be used to wake up a UE and trigger a preparation period. The sequence can be one of: tracking reference signal, secondary synchronization signal, primary synchronization signal, tracking reference signal, demodulation reference signal, sounding reference signal.
[0201]
An example, as shown in FIG. 16, the configuration signaling is transmitted at 1610, the power saving signal based on PDCCH is transmitted at 1620, the preparation period is at 1630 including CSI-RS resource set transmitting at 1680 and CSI reporting at 1690, at 1640 the DRX on-duration state is activated (or starts) if DRX operation is configured or the UE starts to monitor with PDCCH cycle configured by search space. An example, the configuration signaling at 1610 is transmitted by RRC signaling and it indicates a configuration of the preparation period. Another example, the configuration signaling at 1610 is transmitted by RRC signaling and it indicates N configurations of the preparation periods and the power saving signal based on PDCCH at 1620 indicates a configuration of the preparation period. Another more specific example, the configuration signaling at 1610 is transmitted by MAC-CE signaling and it indicates M configurations of the preparation periods and the power saving signal based on PDCCH at 1620 indicates a configuration of the preparation period. Another example, the configuration signaling at 1610 is transmitted by MAC-CE signaling and it indicates a configuration of the preparation period. N is equal to 16 or 32 and M is equal to 8 or 16. Another example, the configuration signaling at 1610 is transmitted by DCI signaling and it indicates a configuration of the preparation period.
[0202]
Example 18
[0203]
In an implementation for the gNB, as in FIG. 4A, the configuration signaling transmitted at 410 includes a trigger state to define the preparation period, and wherein the trigger state indicates one or more of: a report configuration identifier, a QCL information. Wherein, the report configuration identifier indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates at least one of: TRS configuration, L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration. The TRS configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a TRS information parameter; the L1-RSRP computation configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, a repetition parameter; the mobility management configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a CSI-RS resource mobility is configured; the CSI-RS acquisition configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, or an aperiodicTriggeringOffset. Here, the repetition parameter indicates whether repetition is on/off. If the field is set to 'OFF' or if the field is absent, the UE may not assume that the NZP-CSI-RS resources within the resource set are transmitted with the same downlink spatial domain transmission filter and with same NrofPorts in every symbol; the TRS information parameter indicates that the antenna port for all NZP-CSI-RS resources in the CSI-RS resource set is same. If the field is absent or released the UE applies the value "false" .
[0204]
And, the report configuration identifier also indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates an aperiodic triggering offset, wherein the aperiodic triggering offset is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts, the slot where PDCCH monitoring starts, the slot where CSI report is transmitted, the slot where the corresponding signal is transmitted. For example, the reference slot is the slot (at slot 15) where DRX on-duration starts when DRX operation is configured and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the aperiodic triggering offset is equal to 5 slots. Another example, when for DRX operation is not configured, the reference slot is the slot (at slot 18) where PDCCH monitoring starts (the PDCCH monitoring periodicity and offset are configured by the search space) and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the aperiodic triggering offset is equal to 8 slots. Another example, the reference slot is the slot (at slot 5) where CSI-RS resource set is transmitted and the slot in which a CSI-RS resource set is transmitted locates at slot 10, then the aperiodic triggering offset is equal to 5 slots. Another example, the reference slot is the slot (at slot 5) where the corresponding signal is transmitted and the slot in which a CSI-RS resource set is transmitted locates at slot 8, then the aperiodic triggering offset is equal to 3 slots. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH.
[0205]
Besides, the report configuration identifier indicates a list of report slot offsets, wherein the report slot offset in the list of report slot offsets is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts, the slot where PDCCH monitoring starts, the slot where CSI-RS resource set is transmitted, the slot where the corresponding signal is transmitted. For example, the reference slot is the slot (at slot 15) where DRX on-duration starts when DRX operation is configured and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 5 slots. Another example, when for DRX operation is not configured, the reference slot is the slot (at slot 18) where PDCCH monitoring starts (the PDCCH monitoring periodicity and offset are configured by the seach space) and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 8 slots. Another example, the reference slot is the slot (at slot 5) where CSI-RS resource set is transmitted and the slot containing a CSI report locates at slot 10, then the report slot offset is equal to 5 slots. Another example, the reference slot is the slot (at slot 5) where the corresponding signal is transmitted and the slot containing a CSI report locates at slot 8, then the report slot offset is equal to 3 slots. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH. The trigger state of preparation period is only for the case there is data granted or PDSCH scheduled for UE. If there is data granted or PDSCH scheduled for UE, then a trigger state of preparation period will be enabled and the UE detects the preparation period. In most cases, there is not data scheduled for the UE and it doesn’t need to detect the preparation period , the UE can reduce most of power consumption.
[0206]
An example, when configuration signaling includes a trigger state to define the preparation period is not configured (or the trigger state of the preparation period is not set or defined or configured) , then the slot offset between the slot in which the corresponding signal is transmitted and a reference slot is equal to 1 or 0, wherein the reference slot is one of: the slot where DRX on-duration starts, in case the DRX operation is configured; the slot where PDCCH monitoring starts, in case the DRX operation is not configured. The corresponding signal can be one of: power saving signal based on PDCCH, power saving signal based on sequence, power saving signal based on signal, power saving signal based on DCI, a signal transmitting DCI or PDCCH.
[0207]
An example, the report slot offset is one value of a list of report slot offset and the list of report slot offset (reportSlotOffsetList) is defined in the information element of CSI-ReportConfig. Wherein, the values in the list of report slot offset include one or more of: 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048. The aperiodic triggering offset is one value of a set of aperiodic triggering offset (aperiodicTriggeringOffset) and the set of aperiodic triggering offset is defined in the information element of NZP-CSI-RS-ResourceSet. Wherein, the values in the set of aperiodic triggering offset include one or more of: 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 96, 128, 256, 320, 512, 600, 800, 1024, and 2048.
[0208]
Another example, the trigger state is determined by at least one of: a RRC signaling, a MAC-CE signaling, a DCI signaling. More specifically, the trigger state is determined by one of: scheme 1, combination of a RRC signaling and a DCI signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the DCI signaling; scheme 2, combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N trigger states are defined by the RRC signaling, M trigger states in N trigger states are defined by the MAC-CE signaling, and a trigger state in M trigger states is determined by the DCI signaling; scheme 3, combination of a RRC signaling and a MAC-CE signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the MAC-CE signaling; scheme 4, a RRC signaling, wherein a trigger state is determined by the RRC signaling. Wherein, N is a positive integer, M is a integer smaller than or equal to N. An example, N is equal to 16 and M is equal to 8, or N is equal to 32 and M is equal to 8, or N is equal to 64 and M is equal to 16, or N is equal to 8 and M is equal to 4.
[0209]
In some embodiments, the corresponding signal is a power saving signal based on PDCCH, wherein the power saving signal can be used to wake up a UE and trigger a trigger state of a preparation period. The power saving signal based on PDCCH may also includes at least one of: CSI request, Bandwidth part indicator, antenna port, DMRS sequence initialization, Carrier indicator, SRS request, SS/PBCH index. Or, the corresponding signal is a power saving signal based on a sequence, wherein the power saving signal can be used to wake up a UE and trigger a trigger state of a preparation period. The sequence can be one of: tracking reference signal, secondary synchronization signal, primary synchronization signal, tracking reference signal, demodulation reference signal, sounding reference signal. The QCL information includes one or more of: serving cell index, BWP ID, reference signal, and QCL type.
[0210]
An example, as shown in FIG. 16, the configuration signaling is transmitted at 1610, the power saving signal based on PDCCH is transmitted at 1620, the preparation period is at 1630 including CSI-RS resource set transmitting at 1680 and CSI reporting at 1690, at 1640 the DRX on-duration state is activated (or starts) if DRX operation is configured or the UE starts to monitor with PDCCH cycle configured by search space. An example, the configuration signaling at 1610 is transmitted by RRC signaling and it indicates a trigger state of the preparation period. Another example, the configuration signaling at 1610 is transmitted by RRC signaling and it indicates N trigger states of the preparation periods and the power saving signal based on PDCCH at 1620 indicates a trigger state of the preparation period. As a more specific example, the configuration signaling at 1610 is transmitted by MAC-CE signaling and it indicates M trigger states of the preparation periods and the power saving signal based on PDCCH at 1620 indicates a trigger state of the preparation period. Another example, the configuration signaling at 1610 is transmitted by MAC-CE signaling and it indicates a trigger state of the preparation period. N is equal to 16 or 32 and M is equal to 8 or 16. Another example, the configuration signaling at 1610 is transmitted by DCI signaling and it indicates a trigger state of the preparation period.
[0211]
An example for the CSI resource configuration Id indicates a TRS configuration. For TRS (CSI-RS for tracking or tracking reference signal) configuration, a UE in RRC connected mode is expected to receive the higher layer UE specific configuration of a NZP-CSI-RS-ResourceSet configured with higher layer parameter trs-Info. For a NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, the UE shall assume the antenna port with the same port index of the configured NZP CSI-RS resources in the NZP-CSI-RS-ResourceSet is the same. For frequency range 1, the UE may be configured with one or more NZP CSI-RS set (s) , where a NZP-CSI-RS-ResourceSet consists of four periodic NZP CSI-RS resources in two consecutive slots with two periodic NZP CSI-RS resources in each slot. For frequency range 2 the UE may be configured with one or more NZP CSI-RS set (s) , where a NZP-CSI-RS-ResourceSet consists of two periodic CSI-RS resources in one slot or with a NZP-CSI-RS-ResourceSet of four periodic NZP CSI-RS resources in two consecutive slots with two periodic NZP CSI-RS resources in each slot. A UE configured with NZP-CSI-RS-ResourceSet (s) configured with higher layer parameter trs-Info may have the CSI-RS resources configured as: 1) Periodic, with the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with same periodicity, bandwidth and subcarrier location; 2) Periodic CSI-RS resource in one set and aperiodic CSI-RS resources in a second set, with the aperiodic CSI-RS and periodic CSI-RS resource having the same bandwidth (with same RB location) and the aperiodic CSI-RS being 'QCL-Type-A' and 'QCL-TypeD' , where applicable, with the periodic CSI-RS resources. For frequency range 2, the UE does not expect that the scheduling offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the aperiodic CSI-RS resources is smaller than the UE reported ThresholdSched-Offset. The UE shall expect that the periodic CSI-RS resource set and aperiodic CSI-RS resource set are configured with the same number of CSI-RS resources and with the same number of CSI-RS resources in a slot. For the aperiodic CSI-RS resource set if triggered, and if the associated periodic CSI-RS resource set is configured with four periodic CSI-RS resources with two consecutive slots with two periodic CSI-RS resources in each slot, the higher layer parameter aperiodicTriggeringOffset indicates the triggering offset for the first slot for the first two CSI-RS resources in the set.
[0212]
An example for the CSI resource configuration Id indicates a L1-RSRP computation configuration. For L1-RSRP computation configuration, if a UE is configured with a NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition set to 'on' , the UE may assume that the CSI-RS resources, within the NZP-CSI-RS-ResourceSet are transmitted with the same downlink spatial domain transmission filter, where the CSI-RS resources in the NZP-CSI-RS-ResourceSet are transmitted in different OFDM symbols. If repetition is set to 'off' , the UE shall not assume that the CSI-RS resources within the NZP-CSI-RS-ResourceSet are transmitted with the same downlink spatial domain transmission filter. If the UE is configured with a CSI-ReportConfig with reportQuantity set to "cri-RSRP" , or "none" and if the CSI-ResourceConfig for channel measurement (higher layer parameter resourcesForChannelMeasurement) contains a NZP-CSI-RS-ResourceSet that is configured with the higher layer parameter repetition and without the higher layer parameter trs-Info, the UE can only be configured with the same number (1 or 2) of ports with the higher layer parameter nrofPorts for all CSI-RS resources within the set. If the UE is configured with the CSI-RS resource in the same OFDM symbol (s) as an SS/PBCH block, the UE may assume that the CSI-RS and the SS/PBCH block are quasi co-located with 'QCL-TypeD' if 'QCL-TypeD' is applicable. Furthermore, the UE shall not expect to be configured with the CSI-RS in PRBs that overlap with those of the SS/PBCH block, and the UE shall expect that the same subcarrier spacing is used for both the CSI-RS and the SS/PBCH block.
[0213]
An example for the CSI resource configuration Id indicates a mobility management configuration. For the L1-RSRP computation configuration, if a UE is configured with the higher layer parameter CSI-RS-Resource-Mobility and the higher layer parameter associatedSSB is not configured, the UE shall perform measurements based on CSI-RS-Resource-Mobility and the UE may base the timing of the CSI-RS resource on the timing of the serving cell. If a UE is configured with the higher layer parameters CSI-RS-Resource-Mobility and associatedSSB, the UE may base the timing of the CSI-RS resource on the timing of the cell given by the cellId of the CSI-RS resource configuration. Additionally, for a given CSI-RS resource, if the associated SS/PBCH block is configured but not detected by the UE, the UE is not required to monitor the corresponding CSI-RS resource. The higher layer parameter isQuasiColocated indicates whether the associated SS/PBCH block given by the associatedSSB and the CSI-RS resource (s) are quasi co-located with respect to [ 'QCL-TypeD' ] . If a UE is configured with the higher layer parameter CSI-RS-Resource-Mobility and with periodicity greater than 10 ms in paired spectrum, the UE may assume the absolute value of the time difference between radio frame i between any two cells, listed in the configuration with the higher layer parameter CSI-RS-CellMobility and with same refFreqCSI-RS, is less than 153600 Ts. If the UE is configured with DRX, the UE is not required to perform measurement of CSI-RS resources other than during the active time for measurements based on CSI-RS-Resource-Mobility. If the UE is configured with DRX and DRX cycle in use is larger than 80 ms, the UE may not expect CSI-RS resources are available other than during the active time for measurements based on CSI-RS-Resource-Mobility. Otherwise, the UE may assume CSI-RS are available for measurements based on CSI-RS-Resource-Mobility.
[0214]
The following examples are not intended to be limiting. Although specific communications equipment is listed, other equipment may be used in their place. In some example embodiments, the second radio terminal is a base station such as an enhanced node B (eNB) or a next generation node B (gNB) or another base station. The first radio terminal may be a user equipment, mobile terminal, handset, smartphone, cell phone, or other mobile device.
[0215]
Summary
[0216]
The following clauses recite features of various implementations.
[0217]
1. A wireless communications method, comprising:
[0218]
transmitting, from a first radio terminal to a second radio terminal, a configuration signaling; and transmitting a corresponding signal to the second radio terminal, wherein the corresponding signal is based on the configuration signaling.
[0219]
2. The wireless communications method of clause 1, wherein the corresponding signal at least includes periodic signal, which at least includes one of: SSB (synchronization signal block) , secondary synchronization signal, or primary synchronization signal.
[0220]
3. The wireless communications method of clause 2, wherein the configuration signaling comprises a SSB index.
[0221]
4. The wireless communications method of clause 2, wherein the configuration signaling comprises an associated SSB, and the associated SSB includes one or more of: a SSB index or a sign of quasi co-located.
[0222]
5. The wireless communications method of clause 2, wherein the periodic signal is at least used for RRM measurement.
[0223]
6. The wireless communications method of clause 2, wherein the configuration signaling at least includes a cycle of the corresponding signal, and wherein the cycle of the corresponding signal is equal to one of: DRX cycle, a value of DRX cycle multiplied by N1, a value of DRX cycle divided by N2, and N3 milliseconds;
[0224]
wherein, N1 is a positive integer larger than 1, N2 is a positive integer larger than 1, and N3 a positive integer.
[0225]
7. The wireless communications method of clauses 1, wherein the corresponding signal is a power saving signal based on PDCCH, wherein the power saving signal can be used to wake up a UE and trigger a preparation period.
[0226]
8. The wireless communications method of clauses 1, wherein the corresponding signal is a power saving signal based on a sequence, wherein the power saving signal can be used to wake up a UE and trigger a preparation period.
[0227]
9. The wireless communications method of clause 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes one or more of: TRS configuration, a L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration; wherein,
[0228]
the TRS configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a TRS information parameter;
[0229]
the L1-RSRP computation configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, or a repetition parameter;
[0230]
the mobility management configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a CSI-RS resource mobility;
[0231]
the CSI-RS acquisition configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, or an aperiodicTriggeringOffset.
[0232]
11. The wireless communications method of clause 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a CSI resource offset, wherein the CSI resource offset is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of:
[0233]
the slot where DRX on-duration starts;
[0234]
the slot where PDCCH monitoring starts;
[0235]
the slot where CSI report is transmitted;
[0236]
the slot where the corresponding signal is transmitted.
[0237]
12. The wireless communications method of clause 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a report slot offset, wherein the report slot offset is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of:
[0238]
the slot where DRX on-duration starts;
[0239]
the slot where PDCCH monitoring starts;
[0240]
the slot where CSI-RS resource set is transmitted;
[0241]
the slot where the corresponding signal is transmitted.
[0242]
13. The wireless communications method of any clause of 7 to 12, when the configuration signaling to define a preparation period is not configured, then the slot offset between the slot in which the corresponding signal is transmitted and a reference slot is equal to 1, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts.
[0243]
14. The wireless communications method of any clause of 7 to 12, wherein the configuration signaling to define the preparation period is determined by at least one of: a RRC signaling, a MAC-CE signaling, a DCI signaling.
[0244]
15. The wireless communications method of clauses 14, wherein the configuration signaling to define a preparation period is determined by one of:
[0245]
combination of a RRC signaling and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the DCI signaling;
[0246]
combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, M configurations of preparation periods in N configurations of preparation periods are defined by the MAC-CE signaling, and a configuration of preparation period in M configurations of preparation periods is determined by the DCI signaling;
[0247]
combination of a RRC signaling and a MAC-CE signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the MAC-CE signaling;
[0248]
a RRC signaling, wherein a configuration of preparation period is determined by the RRC signaling;
[0249]
wherein, N is a positive integer, M is a integer smaller than N.
[0250]
16. The wireless communications method of clauses 14 or 15, wherein the DCI signaling is transmitted on the power saving signal based on PDCCH.
[0251]
17. The wireless communications method of clause 1, the configuration signaling includes a trigger state to define the preparation period, and wherein the trigger state indicates one or more of: a report configuration identifier, a QCL information.
[0252]
18. The wireless communications method of clause 17, the report configuration identifier indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates at least one of: TRS configuration, a L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration; wherein,
[0253]
the TRS configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a TRS information parameter;
[0254]
the L1-RSRP computation configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, or a repetition parameter;
[0255]
the mobility management configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a CSI-RS resource mobility;
[0256]
the CSI-RS acquisition configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, or an aperiodicTriggeringOffset.
[0257]
19. The wireless communications method of clause 17, the report configuration identifier indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates an aperiodic triggering offset, wherein the aperiodic triggering offset is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of:
[0258]
the slot where DRX on-duration starts;
[0259]
the slot where PDCCH monitoring starts;
[0260]
the slot where CSI report is transmitted;
[0261]
the slot where the corresponding signal is transmitted.
[0262]
20. The wireless communications method of clause 17, the report configuration identifier indicates a list of report slot offsets, wherein the report slot offset in the list of report slot offsets is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of:
[0263]
the slot where DRX on-duration starts;
[0264]
the slot where PDCCH monitoring starts;
[0265]
the slot where CSI-RS resource set is transmitted;
[0266]
the slot where the corresponding signal is transmitted.
[0267]
21. The wireless communications method of clauses 17, wherein the trigger state is determined by at least one of: a RRC signaling, a MAC-CE signaling, a DCI signaling.
[0268]
22. The wireless communications method of clauses 21, wherein the trigger state is determined by one of:
[0269]
combination of a RRC signaling and a DCI signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the DCI signaling;
[0270]
combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N trigger states are defined by the RRC signaling, M trigger states in N trigger states are defined by the MAC-CE signaling, and a trigger state in M trigger states is determined by the DCI signaling;
[0271]
combination of a RRC signaling and a MAC-CE signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the MAC-CE signaling;
[0272]
a RRC signaling, wherein a trigger state is determined by the RRC signaling;
[0273]
wherein, N is a positive integer, M is a integer smaller than N.
[0274]
23. The wireless communications method of clauses 21 or 22, wherein the DCI signaling is transmitted on the power saving signal based on PDCCH.
[0275]
24. The wireless communications method of clause 17, wherein the QCL information includes one or more of: serving cell index, BWP ID, reference signal, and QCL type.
[0276]
25. The wireless communications method of clause 1, wherein the configuration signaling comprises a slot offset threshold.
[0277]
26. The wireless communications method of clause 25, wherein the slot offset threshold includes one or more of:
[0278]
a slot offset threshold of a physical downlink shared channel (PDSCH) ;
[0279]
a slot offset threshold of a physical uplink shared channel (PUSCH) ;
[0280]
a slot offset threshold PDSCH to a hybrid automatic repeat request (HARQ) ;
[0281]
a slot offset threshold of an aperiodic channel state information reference signal (CSI-RS) ;
[0282]
a threshold of PDSCH decoding time;
[0283]
a threshold of PUSCH preparation time;
[0284]
a threshold of channel state information (CSI) computation delay.
[0285]
27. The wireless communications method of clause 1, wherein the configuration signaling comprises:
[0286]
a configuration of power saving signal based on PDCCH;
[0287]
a configuration of power saving signal based on a sequence; and
[0288]
a configuration of preparation period.
[0289]
28. The wireless communications method of clause 27, wherein the configuration signaling is determined by a predefined resource set.
[0290]
29. The wireless communications method of clause 28, wherein the predefined resource set includes at least one of: a frequency range, BWP index, type of RNTI, DRX parameters,
[0291]
30. The wireless communications method of clause 29, wherein, when the frequency range is FR1, then the configuration signaling is the configuration of power saving signal based on PDCCH or the configuration of power saving signal based on a sequence, and wherein when the frequency range is FR2, then the configuration signaling is the configuration of preparation period.
[0292]
31. The wireless communications method of any of clauses 1 to 30, wherein the configuration signaling is enabled by at least one of: a RRC signaling, a MAC-CE signaling, or a DCI signaling.
[0293]
32. A wireless communication method, comprising: receiving, at a second radio terminal from a first radio terminal, a configuration signaling and receiving a corresponding signal from the first radio terminal, wherein the corresponding signal is based on the configuration signaling. Various examples of configuration signaling and additional operations are similar to those described in clauses 1 to 31.
[0294]
33. The wireless communications method of any of clauses 1 to 32, wherein the first radio terminal is a base station of a cellular network, and wherein the second radio terminal is a user equipment of the cellular network.
[0295]
34. A wireless communication apparatus comprising a processor configured to implement a method recited in any one or more of clauses 1 to 33.
[0296]
35. A computer program product having code stored thereon, the code comprising instructions causing a processor to implement a method recited in any one or more of clauses 1 to 33.
[0297]
From the foregoing, it will be appreciated that specific embodiments of the presently disclosed technology have been described herein for purposes of illustration, but that various modifications may be made without deviating from the scope of the invention. Accordingly, the presently disclosed technology is not limited except as by the appended claims.
[0298]
The disclosed and other embodiments, modules and the functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium for execution by, or to control the operation of, data processing apparatus. The computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more them. The term “data processing apparatus” encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal that is generated to encode information for transmission to suitable receiver apparatus.
[0299]
A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document) , in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code) . A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
[0300]
The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit) .
[0301]
Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read only memory or a random-access memory or both. The essential elements of a computer are a processor for performing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto optical disks, or optical disks. However, a computer need not have such devices. Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto optical disks; and CD ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.
[0302]
While this patent document contains many specifics, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. Certain features that are described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
[0303]
Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Moreover, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.
[0304]
Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.

Claims

[Claim 1]
A wireless communications method, comprising: transmitting, from a first radio terminal to a second radio terminal, a configuration signaling; and transmitting a corresponding signal to the second radio terminal, wherein the corresponding signal is based on the configuration signaling.
[Claim 2]
The wireless communications method of claim 1, wherein the corresponding signal at least includes periodic signal, which at least includes one of: SSB (synchronization signal block) , secondary synchronization signal, or primary synchronization signal.
[Claim 3]
The wireless communications method of claim 2, wherein the configuration signaling comprises a SSB index.
[Claim 4]
The wireless communications method of claim 2, wherein the configuration signaling comprises an associated SSB, and the associated SSB includes one or more of: a SSB index or a sign of quasi co-located.
[Claim 5]
The wireless communications method of claim 2, wherein the periodic signal is at least used for RRM measurement.
[Claim 6]
The wireless communications method of claim 2, wherein the configuration signaling at least includes a cycle of the corresponding signal, and wherein the cycle of the corresponding signal is equal to one of: DRX cycle, a value of DRX cycle multiplied by N1, a value of DRX cycle divided by N2, and N3 milliseconds; wherein, N1 is a positive integer larger than 1, N2 is a positive integer larger than 1, and N3 a positive integer.
[Claim 7]
The wireless communications method of claims 1, wherein the corresponding signal is a power saving signal based on PDCCH, wherein the power saving signal can be used to wake up a UE and trigger a preparation period.
[Claim 8]
The wireless communications method of claims 1, wherein the corresponding signal is a power saving signal based on a sequence, wherein the power saving signal can be used to wake up a UE and trigger a preparation period.
[Claim 9]
The wireless communications method of claim 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes one or more of: TRS configuration, a L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration; wherein, the TRS configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a TRS information parameter; the L1-RSRP computation configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, or a repetition parameter; the mobility management configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a CSI-RS resource mobility; the CSI-RS acquisition configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, or an aperiodicTriggeringOffset.
[Claim 10]
The wireless communications method of claim 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a CSI resource offset, wherein the CSI resource offset is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts; the slot where CSI report is transmitted; the slot where the corresponding signal is transmitted.
[Claim 11]
The wireless communications method of claim 1, 7 or 8, the configuration signaling includes a configuration signaling to define a preparation period, and wherein the configuration signaling includes a report slot offset, wherein the report slot offset is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts; the slot where CSI-RS resource set is transmitted; the slot where the corresponding signal is transmitted.
[Claim 12]
The wireless communications method of any claim of 7 to 11, when the configuration signaling to define a preparation period is not configured, then the slot offset between the slot in which the corresponding signal is transmitted and a reference slot is equal to 1, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts.
[Claim 13]
The wireless communications method of any claim of 7 to 11, wherein the configuration signaling to define the preparation period is determined by at least one of: a RRC signaling, a MAC-CE signaling, a DCI signaling.
[Claim 14]
The wireless communications method of claims 13, wherein the configuration signaling to define a preparation period is determined by one of: combination of a RRC signaling and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the DCI signaling; combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N configurations of preparation periods are defined by the RRC signaling, M configurations of preparation periods in N configurations of preparation periods are defined by the MAC-CE signaling, and a configuration of preparation period in M configurations of preparation periods is determined by the DCI signaling; combination of a RRC signaling and a MAC-CE signaling, wherein N configurations of preparation periods are defined by the RRC signaling, and a configuration of preparation period in N configurations of preparation periods is determined by the MAC-CE signaling; a RRC signaling, wherein a configuration of preparation period is determined by the RRC signaling; wherein, N is a positive integer, M is an integer smaller than or equal to N.
[Claim 15]
The wireless communications method of claims 13 or 14, wherein the DCI signaling is transmitted on the power saving signal based on PDCCH.
[Claim 16]
The wireless communications method of claim 1, the configuration signaling includes a trigger state to define the preparation period, and wherein the trigger state indicates one or more of: a report configuration identifier, a QCL information.
[Claim 17]
The wireless communications method of claim 16, the report configuration identifier indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates at least one of: TRS configuration, a L1-RSRP computation configuration, mobility management configuration, CSI acquisition configuration; wherein, the TRS configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a TRS information parameter; the L1-RSRP computation configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, an aperiodicTriggeringOffset, or a repetition parameter; the mobility management configuration includes one or more of: a nzp-CSI resource set identifier, nzp-CSI-RS resources, a NZP-CSI-RS resource identifier, an aperiodic triggering offset, or a CSI-RS resource mobility; the CSI-RS acquisition configuration includes one or more of: a nzp-CSI-ResourceSetId, nzp-CSI-RS-resources, a NZP-CSI-RS-ResourceId, or an aperiodicTriggeringOffset.
[Claim 18]
The wireless communications method of claim 16, the report configuration identifier indicates a CSI resource configuration Id, wherein the CSI resource configuration Id indicates an aperiodic triggering offset, wherein the aperiodic triggering offset is a time gap between the slot in which a CSI-RS resource set is transmitted and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts; the slot where CSI report is transmitted; the slot where the corresponding signal is transmitted.
[Claim 19]
The wireless communications method of claim 16, the report configuration identifier indicates a list of report slot offsets, wherein the report slot offset in the list of report slot offsets is a time gap between the slot containing a CSI report and a reference slot, wherein the reference slot is one of: the slot where DRX on-duration starts; the slot where PDCCH monitoring starts; the slot where CSI-RS resource set is transmitted; the slot where the corresponding signal is transmitted.
[Claim 20]
The wireless communications method of claims 16, wherein the trigger state is determined by at least one of: a RRC signaling, a MAC-CE signaling, a DCI signaling.
[Claim 21]
The wireless communications method of claims 20, wherein the trigger state is determined by one of: combination of a RRC signaling and a DCI signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the DCI signaling; combination of a RRC signaling, a MAC-CE signaling, and a DCI signaling, wherein N trigger states are defined by the RRC signaling, M trigger states in N trigger states are defined by the MAC-CE signaling, and a trigger state in M trigger states is determined by the DCI signaling; combination of a RRC signaling and a MAC-CE signaling, wherein N trigger states are defined by the RRC signaling, and a trigger state in N trigger states is determined by the MAC-CE signaling; a RRC signaling, wherein a trigger state is determined by the RRC signaling; wherein, N is a positive integer, M is an integer smaller than or equal to N.
[Claim 22]
The wireless communications method of claims 20 or 21, wherein the DCI signaling is transmitted on the power saving signal based on PDCCH.
[Claim 23]
The wireless communications method of claim 16, wherein the QCL information includes one or more of: serving cell index, BWP ID, reference signal, and QCL type.
[Claim 24]
The wireless communications method of claim 1, wherein the configuration signaling comprises a slot offset threshold.
[Claim 25]
The wireless communications method of claim 24, wherein the slot offset threshold includes one or more of: a slot offset threshold of a physical downlink shared channel (PDSCH) ; a slot offset threshold of a physical uplink shared channel (PUSCH) ; a slot offset threshold PDSCH to a hybrid automatic repeat request (HARQ) ; a slot offset threshold of an aperiodic channel state information reference signal (CSI-RS) ; a threshold of PDSCH decoding time; a threshold of PUSCH preparation time; a threshold of channel state information (CSI) computation delay.
[Claim 26]
The wireless communications method of claim 1, wherein the configuration signaling comprises: a configuration of power saving signal based on PDCCH; a configuration of power saving signal based on a sequence; and a configuration of preparation period.
[Claim 27]
The wireless communications method of claim 26, wherein the configuration signaling is determined by a predefined resource set.
[Claim 28]
The wireless communications method of claim 27, wherein the predefined resource set includes at least one of: a frequency range, BWP index, type of RNTI, DRX parameters,
[Claim 29]
The wireless communications method of claim 28, wherein, when the frequency range is FR1, then the configuration signaling is the configuration of power saving signal based on PDCCH or the configuration of power saving signal based on a sequence, and wherein when the frequency range is FR2, then the configuration signaling is the configuration of preparation period.
[Claim 30]
The wireless communications method of any of claims 1 to 29, wherein the configuration signaling is enabled by at least one of: a RRC signaling, a MAC-CE signaling, or a DCI signaling.
[Claim 31]
A wireless communications method, comprising: receiving, at a second radio terminal from a first radio terminal, a configuration signaling; and receiving a corresponding signal from the first radio terminal, wherein the corresponding signal is based on the configuration signaling.
[Claim 32]
The wireless communications method of any of claims 1 to 31, wherein the first radio terminal is a base station of a cellular network, and wherein the second radio terminal is a user equipment of the cellular network.
[Claim 33]
A wireless communication apparatus comprising a processor configured to implement a method recited in any one or more of claims 1 to 32.
[Claim 34]
A computer program product having code stored thereon, the code comprising instructions causing a processor to implement a method recited in any one or more of claims 1 to 33.

Drawings

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