CN-119678617-B - Wireless communication device and wireless communication method for SBFD operations

Abstract

The application discloses a wireless communication method for sub-band full-duplex (SBFD) operation, which is executed by a base station, and comprises the steps that the base station configures time/frequency position and bandwidth of a sub-band pool for user equipment (UE) in a cell through radio resource control (RRC) static configuration, and the base station indicates and activates/deactivates downlink (DL) or uplink (UL) sub-bands of one or more UEs in the cell through physical layer signaling comprising downlink control information DCI or MAC layer signaling comprising medium access control (MAC) control element (CE).

Inventors

• Shahid simple

Assignees

• 深圳TCL新技术有限公司

Dates

Publication Date

20260512

Application Date

20220811

Claims (20)

1. 1. A wireless communication method for sub-band full duplex SBFD operation performed by a base station, comprising: The base station configures time/frequency location and bandwidth of a subband pool for user equipment UE in a cell through radio resource control RRC static configuration, and The base station indicates and activates/deactivates downlink DL or uplink UL sub-bands of one or more UEs in the cell through physical layer signaling including downlink control information DCI or MAC layer signaling including a media access control MAC control element CE, wherein the DCI includes a sub-band indication field and a sub-band activation/deactivation field, the sub-band activation/deactivation field is used in a single UE-specific manner and includes N bits in a bitmap form, the N bits of the sub-band activation/deactivation field is equal to the N bits of the sub-band indication field, wherein the MAC CE includes the sub-band indication field and the sub-band activation/deactivation field, the sub-band activation/deactivation field of the MAC CE activates/deactivates the DL or UL sub-bands, and a length of the sub-band activation/deactivation field of the MAC CE depends on a length of the sub-band indication field of the MAC CE.
2. 2. The wireless communication method of claim 1, wherein the RRC static configuration is used to configure SBFD time-frequency resources for the UE in the cell.
3. 3. The method of claim 1, wherein the pool of subbands is a slot or symbol, wherein the slot or symbol is a DL slot or symbol, an UL slot or symbol, or a flexible slot or symbol.
4. 4. The wireless communication method of claim 1, wherein the RRC static configuration includes a TDD-Subband-ConfigCommon information element IE.
5. 5. The wireless communication method according to claim 1, wherein the subband indication field is used in a single UE-specific or UE group-specific manner and contains N bits in the form of a bitmap, where N is the number of subbands configured by the RRC static configuration, and the bits of each bitmap are associated with one subband.
6. 6. The wireless communication method of claim 5, wherein the indication of the DL or UL sub-bands is from bits of the bitmap.
7. 7. The wireless communication method of claim 5, wherein a first value of one bit of the bitmap indicates the DL subband to the one or more UEs in the cell and a second value of one bit of the bitmap indicates the UL subband to the one or more UEs in the cell.
8. 8. The wireless communication method of claim 1, wherein the subband activation/deactivation field provides the bitmap to one UE, the bits of each bitmap being associated with activation/deactivation of one subband.
9. 9. The wireless communication method of claim 1, wherein a first value of one bit of the bitmap activates the DL or UL sub-band to the UE and a second value of one bit of the bitmap deactivates the DL or UL sub-band to the UE.
10. 10. The wireless communication method of claim 1, wherein the base station indicates the DL or UL sub-bands to the one or more UEs using a first DCI and activates/deactivates the DL or UL sub-bands to the one or more UEs using a second DCI.
11. 11. The wireless communication method of claim 10, wherein the first DCI is UE group-specific, the DL or UL subbands being indicated to a group of UEs by transmitting the subband indication field.
12. 12. The wireless communication method of claim 10, wherein the second DCI is specific to a UE, and wherein the DL or UL subbands are activated or deactivated to each UE by transmitting the subband activation/deactivation field.
13. 13. The wireless communication method according to claim 10, wherein the first DCI is a group generic DCI with a cyclic redundancy check, CRC, scrambled by a new subband indication-radio network temporary identifier, SBI-RNTI, and/or the second DCI is a UE specific DCI with the CRC scrambled by the new SBI RNTI.
14. 14. The wireless communication method of claim 1, wherein the base station uses UE-specific DCI, CRC scrambled with a new SBI RNTI for indication and activation/deactivation of the DL or UL subbands for the one or more UEs.
15. 15. The wireless communication method of claim 14, wherein the UE-specific DCI sequentially transmits a bitmap of the subband indication field and the subband activation/deactivation field, wherein a first field of the bitmap is used to indicate the DL or UL subbands to the UE and a second field is used to activate or deactivate the DL or UL subbands to the UE.
16. 16. The wireless communication method of claim 14, wherein the base station indicates and activates/deactivates the DL or UL subbands for the one or more UEs using alternating bits of the subband indication field and the subband activation/deactivation field of UE-specific DCI.
17. 17. The wireless communication method of claim 16, wherein the subband indication field of the MAC CE indicates an identification of a subband to the one or more UEs, and wherein the subband indication field of the MAC CE is up to 4 bits in length and varies according to the number of subbands configured by the RRC static configuration.
18. 18. The wireless communication method of claim 17, wherein a bit in the subband indication field of the MAC CE is set to a first value to indicate to the UE a DL subband that maps to the position of the bit, and wherein the bit is set to a second value to indicate to the UE a UL subband that maps to the position of the bit.
19. 19. The wireless communication method of claim 1, wherein a bit in the subband activation/deactivation field is set to a first value to activate the DL or UL subband, a position mapped to the bit is mapped to the UE, and the bit is set to a second value to deactivate the DL or UL subband, a position mapped to the bit is mapped to the UE.
20. 20. The wireless communication method of claim 1, wherein the MAC CE includes one byte for performing the indication and activation/deactivation of the DL or UL sub-bands.

Description

Wireless communication device and wireless communication method for SBFD operations Technical Field The present application relates to the field of wireless communication systems, and in particular to wireless communication devices and wireless communication methods for sub-band full-duplex (SBFD) operation in a 5G NR (new radio) communication system. More particularly, the present application discusses a SBFD configuration method in which a gNB (next generation base station) can configure a subband pool for a User Equipment (UE) in a cell through radio resource control (radio resource control, RRC) statically and perform dynamic indication and activation/deactivation operations on Downlink (DL) or Uplink (UL) subbands of one or more UEs. Background SBFD operation is a new function defined in Release 18, and it is not yet defined how to inform the UE of the time and/or frequency location of the sub-bands that the gNB will use for SBFD operation. Re-using the existing method of legacy TDD configuration for SBFD configuration/indication UEs may introduce the challenge of 1. Higher layer signaling overhead may be increased because higher layer signaling may need to be configured for each sub-band. Furthermore, if the time-frequency locations of the DL or UL subbands change, higher layer signaling may need to be reconfigured. 2. The flexibility of the subbands may be reduced because the subband configuration may fix the subbands for only the DL or UL directions in a particular slot/symbol. 3. Coexistence problems of legacy operation and SBFD operation may result because there are legacy UEs in the cell that use legacy TDD configurations. 4. The complexity of the gNB may be increased, for example, to handle transmission collisions of SSB (DL direction) and UL sub-bands in the same slot/symbol, or transmission collisions of PRACH opportunities (UL direction) and DL sub-bands in the same slot/symbol. In the prior art, proposals submitted to 3GPP RAN1#109-e conferences regarding the configuration of SBFD time/frequency resources and their indication to the UE have focused mainly on configuring the DL and UL sub-bands by reusing existing TDD-UL-DL-ConfigCommon or TDD-UL-DL-ConfigDedicated. However, none of these proposals focuses on how to reduce the higher layer signaling configuration overhead and how to simplify the configuration process. Accordingly, there is a need for a wireless communication device and wireless communication method that define the configuration, indication, and activation/deactivation of DL or UL subbands for one or more UEs in a cell operated by SBFD. Disclosure of Invention The present application aims to propose a wireless communication device and a wireless communication method for sub-band full-duplex (SBFD) operation, which can solve the problems in the prior art, define a method for SBFD configuration, indication and activation/deactivation of one or more UEs in a cell, simplify the configuration process, reduce the overhead of high-layer signaling, make the sub-band operation more flexible, simplify the process of collision handling between SSB and UL sub-band transmission or PRACH opportunity and DL sub-band transmission, and/or provide good communication performance. . In a first aspect of the application, a wireless communication method for a base station for sub-band full-duplex (SBFD) operation includes the base station configuring a time/frequency location and a bandwidth of a sub-band pool for a User Equipment (UE) in a cell through a radio resource control (radio resource control, RRC) static configuration, and the base station indicating and activating/deactivating Downlink (DL) or Uplink (UL) sub-bands of one or more UEs in the cell through physical layer signaling including downlink control information (downlink control information, DCI) or MAC layer signaling including a media access control (medium access control, MAC) element (CE). In a second aspect of the application, a base station includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to configure a time/frequency location and a bandwidth of a subband pool for User Equipments (UEs) in a cell through a radio resource control (radio resource control, RRC) static configuration, and to indicate and activate/deactivate Downlink (DL) or Uplink (UL) subbands of one or more UEs in the cell through physical layer signaling including Downlink Control Information (DCI) or MAC layer signaling including a media access control (medium access control, MAC) element (CE). In a third aspect of the application, a non-transitory machine-readable storage medium has instructions stored thereon, which when executed by a computer, cause the computer to perform the above-described method. In a fourth aspect of the application, a chip comprises a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is mounted to perfor