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1. (WO2019032845) TDD CONFIGURATION AND USE OF SPECIAL SUBFRAMES FOR feNB-IoTs
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CLAIMS

What is claimed is:

1. An apparatus of an enhanced node B (eNB) configured for communicating with a narrowband Internet-of-Things NB-IoT User Equipment (UE), the apparatus comprising: memory; and processing circuitry, configured to:

encode radio-resource control (RRC) signalling for transmission to the NB-IoT UE, the RRC signalling indicating a subframe configuration for a radio frame configured for time-division duplexing (TDD) operation,

the subframe configuration comprising: one or more downlink subframes reserved for downlink transmission, one or more uplink subframes reserved for uplink transmission, and one or more special subframes, wherein each of the one or more special subframes follows one of the downlink subframes and precedes one of the uplink subframes within the radio frame,

wherein each of the one or more special subframes comprises a downlink portion (DwPTS) reserved for downlink transmission, a guard period (GP), and an uplink portion (UpPTS) reserved from uplink transmission;

encode a narrowband physical downlink control channel (NPDCCH) with DO format Nl or N2 for transmission to the NB-IoT UE, the DO format indicating a number of repetitions of a narrowband physical downlink shared channel (NPDSCH) in one or more consecutive subframes, the one or more consecutive subframes including one or more special subframes;

map the NPDSCH to resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein if the number of repetitions is greater than one, resource elements, of the one or more special subframes that are not part of a DwPTS, are counted but are not used in mapping, and

wherein if the number of repetitions is equal to one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted or used in the mapping; and

configure the eNB to transmit the encoded NPDSCH in the one or more subframes including one or more special subframes in accordance with the mapping,

wherein the memory is configured to store the number of repetitions.

2. The apparatus of claim 1, wherein the subframe configuration is one of a plurality of Uplink-Downlink configurations, wherein the indicated subframe configuration has at least four downlink subframes per radio frame.

3. The apparatus of claim 2 wherein the RRC signaling comprises a system information block type-1 narrowband (SIB1-NB) for transmission to the NB-IoT UE, the SIB1-NB indicating the subframe configuration for the TDD operation.

4. The apparatus of claim 3, wherein for each of the one or more special subframes, the GP follows the DwPTS and precedes the UpPTS, and

wherein Uplink-Downlink configurations 0 and 6 of the plurality are not supported by the NB-IoT UE.

5. The apparatus of claim 1 wherein if the number of repetitions is greater than one, the processing circuitry is configured to:

perform rate-matching to map symbols of the NPDSCH to resource elements in the one or more subframes including resource elements of one or more special subframes, wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are counted for the performance of the rate matching; and

configure the eNB to refrain from transmission of the NPDSCH in resource elements of the one or more special subframes that are not part of a

DwPTS that were counted for the performance of the rate matching by puncturing symbols mapped to resource elements of the one or more special subframes that are not part of a DwPTS.

6. The apparatus of claim 1 wherein the processing circuitry is configured to:

perform rate-matching to map symbols of the NPDSCH to resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are counted for the performance of the rate matching if the number of repetitions is greater than one; and

wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted for the performance of the rate matching if the number of repetitions is equal to one, and

configure the eNB to refrain from transmission of the NPDSCH in resource elements of the one or more special subframes that are not part of a DwPTS that were counted for the performance of the rate matching by puncturing symbols mapped to resource elements of the one or more special subframes that are not part of a DwPTS.

7. The apparatus of claim 1, wherein if the number of repetitions is greater than one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are counted as part of a sequence of symbols but are excluded from the mapping, and

wherein if the number of repetitions is equal to one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted as part of the sequence of symbols for the mapping.

8. The apparatus of claim 1 wherein resource elements, of the one or more special subframes, that are part of a DwPTS are counted and are used in the mapping, and

wherein the eNB is configured to transmit symbols of the NPDSCH that are mapped to the resource elements, of the one or more special subframes, that are part of a DwPTS in accordance with the mapping.

9. The apparatus according to claim 1, wherein:

the one or more special subframes and the downlink subframes include 14 symbol periods,

the processing circuitry is further configured to:

encode first narrowband reference signals (NRSs) in a first plurality of symbol periods of the downlink subframes, wherein the symbol periods of the downlink subframes are indexed by 0-13, and the first plurality of symbol periods are indexed by S, 6, 12, and 13; and

encode second NRSs in a second plurality of symbol periods of the DwPTS, wherein the symbol periods of the DwPTS are indexed by 0-13, and the second plurality of symbol periods are indexed by S, 6, 9, and 10.

10. The apparatus of claim 1, wherein the eNB is configured for one or more repetitions of the NPDCCH in one or more consecutive subframes including one or more special subframes,

wherein the processing circuitry is configured to map the NPDCCH to resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein if the number of repetitions of the NPDCCH is greater than one, resource elements, of the one or more special subframes that are not part of a DwPTS, are counted but are not used in mapping, and

wherein if the number of repetitions of the NPDCCH is equal to one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted or used in the mapping; and

the processing circuity is to configure the eNB to transmit the encoded

NPDCCH in the one or more subframes including one or more special subframes in accordance with the mapping.

11. The apparatus of claim 10, wherein the processing circuitry is configured to:

perform rate-matching to map symbols of the NPDCCH to resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are counted for the performance of the rate matching if the number of repetitions of the NPDCCH is greater than one; and

wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted for the performance of the rate matching if the number of repetitions of the NPDCCH is equal to one, and

configure the eNB to refrain from transmission of the NPDCCH in resource elements of the one or more special subframes that are not part of a DwPTS that were counted for the performance of the rate matching by puncturing symbols mapped to resource elements of the one or more special subframes that are not part of a DwPTS.

12. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of enhanced node B (eNB) configured for communicating with a narrowband Internet-of-Things NB-IoT User Equipment (UE), the instructions to configure the eNB to perform operations to:

encode radio-resource control (RRC) signalling for transmission to the NB-IoT UE, the RRC signalling indicating a subframe configuration for a radio frame configured for time-division duplexing (TDD) operation,

the subframe configuration comprising: one or more downlink subframes reserved for downlink transmission, one or more uplink subframes reserved for uplink transmission, and one or more special subframes, wherein each of the one or more special subframes follows one of the downlink subframes and precedes one of the uplink subframes within the radio frame,

wherein each of the one or more special subframes comprises a downlink portion (DwPTS) reserved for downlink transmission, a guard period (GP), and an uplink portion (UpPTS) reserved from uplink transmission;

encode a narrowband physical downlink control channel (NPDCCH) with DO format Nl or N2 for transmission to the NB-IoT UE, the DO format indicating a number of repetitions of a narrowband physical downlink shared channel (NPDSCH) in one or more consecutive subframes, the one or more consecutive subframes including one or more special subframes;

map the NPDSCH to resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein if the number of repetitions is greater than one, resource elements, of the one or more special subframes that are not part of a DwPTS, are counted but are not used in mapping, and

wherein if the number of repetitions is equal to one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted or used in the mapping; and

configure the eNB to transmit the encoded NPDSCH in the one or more subframes including one or more special subframes in accordance with the mapping.

13. The non-transitory computer-readable storage medium of claim 12, wherein the subframe configuration is one of a plurality of Uplink-Downlink configurations, and

wherein the indicated subframe configuration has at least four downlink subframes per radio frame.

14. The non-transitory computer-readable storage medium of claim 13 wherein the RRC signaling comprises a system information block type-1 narrowband (SIB1-NB) for transmission to the NB-IoT UE, the SIB1-NB indicating the subframe configuration for the TDD operation.

15. The non-transitory computer-readable storage medium of claim 14, wherein for each of the one or more special subframes, the GP follows the

DwPTS and precedes the UpPTS, and

wherein Uplink-Downlink configurations 0 and 6 of the plurality are not supported by the NB-IoT UE.

16. The apparatus of claim 11 wherein if the number of repetitions is greater than one, the processing circuitry is configured to:

perform rate-matching to map symbols of the NPDSCH to resource elements in the one or more subframes including resource elements of one or more special subframes, wherein resource elements, of the one or more special subframes that are not part of a DwPTS, are counted for the performance of the rate matching; and

configure the eNB to refrain from transmission of the NPDSCH in resource elements of the one or more special subframes that are not part of a DwPTS that were counted for the performance of the rate matching by puncturing symbols mapped to resource elements of the one or more special subframes that are not part of a DwPTS.

17. An apparatus of a narrowband Internet-of-Things NB-IoT User

Equipment (UE), the apparatus comprising: memory; and processing circuitry, configured to:

decode radio-resource control (RRC) signalling from an enhanced node B (eNB), the RRC signalling indicating a subframe configuration for a radio frame configured for time-division duplexing (TDD) operation,

the subframe configuration comprising: one or more downlink subframes reserved for downlink transmission, one or more uplink subframes reserved for uplink transmission, and one or more special subframes, wherein each of the one or more special subframes follows one of the downlink subframes and precedes one of the uplink subframes within the radio frame,

wherein each of the one or more special subframes comprises a downlink portion (DwPTS) reserved for downlink transmission, a guard period (GP), and an uplink portion (UpPTS) reserved from uplink transmission;

decode a narrowband physical downlink control channel (NPDCCH) with DO format Nl or N2 received from the eNB, the DO format indicating a number of repetitions of a narrowband physical downlink shared channel (NPDSCH) in one or more consecutive subframes, the one or more consecutive subframes including one or more special subframes;

decode the NPDSCH received in the one or more subframes including one or more special subframes, wherein to decode the NPDSCH, the processing circuitry is configured to demap the NPDSCH received in resource elements in the one or more subframes including resource elements of one or more special subframes,

wherein if the number of repetitions is greater than one, resource elements, of the one or more special subframes that are not part of a DwPTS, are counted but are not used in demapping, and

wherein if the number of repetitions is equal to one, the resource elements, of the one or more special subframes that are not part of a DwPTS, are not counted or used in the demapping; and

wherein the memory is configured to store the number of repetitions.

18. The apparatus of claim 17 wherein the subframe configuration is one of a plurality of Uplink-Downlink configurations, wherein the indicated subframe configuration has at least four downlink subframes per radio frame.

19. The apparatus of claim 18 wherein the RRC signaling comprises a system information block type-1 narrowband (SIB1-NB) for decoding by the NB-IoT UE, the SIB 1-NB indicating the subframe configuration for the TDD operation.

20. The apparatus of claim 19, wherein for each of the one or more special subframes, the GP follows the DwPTS and precedes the UpPTS, and wherein Uplink-Downlink configurations 0 and 6 of the plurality are not supported by the NB-IoT UE.