Provided are an initialization method, device and system, which are applied in the technical field of communications. An initialization process specifically comprises: an access device adjusts a downlink/uplink asymmetry ratio of a synchronous time division duplexing frame which is used for message interaction in an adjustment system according to an initialization request, and a first user terminal device is initialized with an adjusted downlink/uplink asymmetry ratio. By way of adjusting a downlink/uplink asymmetry ratio firstly before the initialization of a first user terminal device, the allocation of downlink/uplink slots in a synchronous time division duplexing frame which is used for message interaction in the system is made more balanced, so as to enable the first user terminal device to complete initialization more quickly, and it can improve the success rate of initialization and improve the user experience.

A wavelength tunable laser, a passive optical network system and a device. The wavelength tunable laser comprises a partial reflector (11), a gain medium (12), an optical switch (13) and at least two filtering reflection components (14). Channel central wavelengths of the at least two filtering reflection components (14) are different. The optical switch (13) is used to control a transmission direction of optical signals output by the gain medium (12) so as to selectively transmit the optical signals to one of the filtering reflection components. The filtering reflection components (14) are used to perform filtering processing on the optical signals and reflect the optical signals to the optical switch (13). The optical signals after filtering processing are transmitted to the partial reflector (11) through the optical switch (13) and the gain medium (12) in sequence. The partial reflector (11) is used to output some of the optical signals after filtering processing and reflect some of the optical signals after filtering processing.

Provided are a method, apparatus and network system for processing software loading. The method comprises: a software loading control centre device receives a software loading request from a node to be loaded, and performs feature matching in a maintained configuration database according to the feature information of the node to be loaded, so as to select a target node which can provide software to be loaded for the node to be loaded; the target node is a node which has completed software loading; and the software loading control centre device indicates to the node to be loaded to download the software to be loaded from the target node, so as to complete software loading. By way of taking a node which has completed software loading as a provider of software to be loaded, each instance of the present invention can improve the overall speed of software loading of the system and decrease the waiting time of loading; and reduce the CPU loads of a software loading server, save energy and reduce the costs in the case where there are many or too many nodes.

The present invention relates to the field of network communications. Disclosed is an optical-fiber attenuation-compensation method, which comprises: a first network element sending a first request message to a downstream adjacent network element of the first network element, the first request message at least comprising output power of a first optical amplifier, a maximum adjustment amount of a first optical-adjustable attenuator and a non-compensation amount of the first network element, the first network element at least comprising the first optical amplifier and the first optical-adjustable attenuator, and an output port of the first optical amplifier being connected to an input port of the first optical-adjustable attenuator; the first network element receiving a response message comprising an adjustment amount of the first optical-adjustable attenuator, and saving the adjustment amount of the first optical-adjustable attenuator. The adjustment amount of the first optical-adjustable attenuator is determined by the downstream adjacent network element of the first network element based on the output power of the first optical amplifier, the maximum adjustment amount of the first optical-adjustable attenuator and the non-compensation amount of the first network element. Further disclosed are an optical-fiber attenuation-compensation system and a network element.

Provided are a signal transmission device and an electronic device. The signal transmission device comprises: a back panel and at least two connector combination groups. Each connector combination group comprises: at least one first connector on a first surface of the back panel and at least one second connector at a second surface of the back panel. The direction of each of the connector combination groups is: an overlapping area of a second connector in each connector combination group faces the direction of a non-overlapping area of the second connector, and the at least one first connector forms an array structure on the first surface of the back panel; if a first connector combination group and a second connector combination group in the at least two connector combination groups are adjacent connector combinations, the direction of the first connector combination group is opposite to the direction of the second connector combination group. The signal transmission device solves problems in a signal transmission device with a half-orthogonal architecture in the prior art.

Provided are a passive optical network communication method and system, and an optical line terminal. The system comprises an OLT, an ODN and an ONU. The OLT is used for generating wide-spectrum light and downlink light, forming a downlink signal by the downlink light carrying downlink data on which orthogonal frequency division multiplexing modulation is performed and is to be sent to at least one optical network unit; the ODN is used for dividing the wide-spectrum light into at least one light wave respectively corresponding to the at least one optical network unit, and sending the at least one light wave and the downlink signal to at least one corresponding optical network unit respectively. The at least one optical network unit is used for receiving the downlink signal, and performing orthogonal frequency division multiplexing demodulation on the downlink signal to obtain downlink data; and carrying uplink data, on which orthogonal frequency division multiplexing modulation is performed and is to be sent to an optical line terminal, on a light wave received from a light distribution network to form an uplink signal, and sending the uplink signal to the light distribution network. The present invention realizes having each ONU working at different emission wavelengths with a low cost.

Provided are a ranking method, device and terminal. The method comprises: when the data state of master data in a database is updated, a ranking device acquiring a ranking list corresponding to the updated data state according to the updated data state of the master data, the ranking list comprising an identification information set ranked according to a preset ranking rule; according to each piece of identification information in the identification information set, acquiring data state parameters corresponding to each piece of the identification information; and according to the updated data state parameters and the data state parameters corresponding to each piece of the identification information, updating the ranking list. According to the ranking method, device and terminal of the present invention, the problem of acquiring TOP N data being time-consuming in the prior art can be overcome.

Disclosed are an electro-optic modulation device, method, transmitter, and system, relating to the field of communications. Pre-distortion compensation is performed on a digital electrical signal through a non-linearity memory polynomial so as to eliminate the non-linearity of an electro-optic modulation device with high accuracy, high production efficiency, a simple structure, easy implementation, and low costs. The electro-optic modulation device comprises: a receiving unit, a compensation unit, and an electro-optic modulator which are connected successively, wherein the receiving unit is used for receiving a digital electrical signal u (n); the compensation unit is used for performing pre-distortion compensation on the digital electrical signal u (n) according to said non-linearity memory polynomial so as to acquire a digital electrical signal x (n) after pre-distortion compensation is performed thereon; and the electro-optic modulator is used for converting the digital electrical signal x (n) after pre-distortion compensation is performed thereon into an optical signal.

Disclosed are an external cavity laser, an optic transmitter and a passive optical network system. The external cavity laser comprises: a gain dielectric (10), an optical modulator (20), a first optical filter (30) and a reflective device (40). The gain dielectric (10) generates an optical signal and transmits same to the first optical filter (30), the optical signal passing through the first optical filter (30) is reflected into a first optical signal and a second optical signal by the reflective device (40), and the reflective device (40) transmits the first optical signal to the gain dielectric (10) and transmits the second optical signal to the optical modulator (20).

Disclosed is a high-speed peripheral component interconnect express interface control unit. A high-speed peripheral component interconnect express interface control unit comprises: a P2P module with a PCI-to-PCI bridge, used for receiving a first transaction layer packet (TLP) message from a root complex (RC) or an endpoint device (EP), and forwarding the first TLP message to a reliable TLP transmission (RTT) module for processing; and the reliable TLP transmission module, used for determining a sending link connected to a main/standby PCIE switch unit according to the first TLP message received, and at the same time sending the first TLP message to the main/standby PCIE switch unit via the sending link so that a target PCIE interface controller of the first TLP message selectively receives the first TLP message forwarded by the main/standby PCIE switch unit and sends same to a target EP or a target RC of the first TLP message, thereby achieving the reliable transmission of the TLP message during a dual-plane networking connection of a PCIE switch, and improving the reliability of a system adopting the PCIE switch. Also disclosed are a method, system and storage medium for transmitting a message of a PCIE switch network.