Method and device for signaling information related to TDD slot configuration in NR V2X

1. A method for performing wireless communication by a first device, the method comprising:

obtaining information related to a time division duplex (TDD) configuration;

obtaining information related to a starting symbol of sidelink symbols and information related to a number of sidelink symbols;

determining candidate resources to which a bitmap related to a sidelink resource pool is applied based on the information related to the TDD configuration;

transmitting, to a second device, a sidelink-synchronization signal block (S-SSB),

wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS) and a physical sidelink broadcast channel (PSBCH) including a TDD slot configuration; and

transmitting, to the second device, a physical sidelink shared channel (PSSCH) based on information related to the TDD slot configuration in the PSBCH,

wherein the sidelink resource pool includes a plurality of slots,

wherein the starting symbol of the sidelink symbols included in each of the plurality of slots and the number of the sidelink symbols included in each of the plurality of slots are configured to be the same in the sidelink resource pool.

2. The method of claim 1 , wherein the information related to the starting symbol of the sidelink symbols is in a form of a bit map.

3. The method of claim 2 , wherein the bitmap is configured based on a symbol unit.

4. The method of claim 1 , wherein resources for transmitting the S-SSB are pre-configured by a higher layer.

5. The method of claim 1 , wherein resources for transmitting the S-SSB include resources in a frequency domain and a time domain.

6. The method of claim 1 , wherein information related to a pre-configured sidelink resource pool by a higher layer is transmitted to the second device through the PSBCH.

7. The method of claim 6 , wherein the information related to the pre-configured sidelink resource pool is in a form of a bit map.

8. The method of claim 1 , wherein information on a sidelink slot or a sidelink symbol included in the sidelink resource pool among the information related to the TDD slot configuration is transmitted to the second device through the PSBCH.

9. The method of claim 8 , wherein the information on the sidelink slot or the sidelink symbol included in the sidelink resource pool among the information related to the TDD slot configuration is in a form of a bit map.

10. The method of claim 9 , wherein the bitmap is configured based on any one of a subframe unit, a slot unit, or a symbol unit.

11. The method of claim 1 , wherein the sidelink resource pool is configured based on the candidate resources.

12. The method of claim 11 , wherein resources for transmitting the S-SSB is not included in the sidelink resource pool.

13. A first device for performing wireless communication, the first device comprising:

one or more memories storing instructions;

one or more transceivers; and

one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:

obtain information related to a time division duplex (TDD) configuration,

obtain information related to a starting symbol of sidelink symbols and information related to a number of sidelink symbols,

determine candidate resources to which a bitmap related to a sidelink resource pool is applied based on the information related to the TDD configuration,

transmit, to a second device, a sidelink-synchronization signal block (S-SSB),

wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS) and a physical sidelink broadcast channel (PSBCH) including a TDD slot configuration,

transmit, to the second device, a physical sidelink shared channel (PSSCH) based on information related to the TDD slot configuration in the PSBCH,

wherein the sidelink resource pool includes a plurality of slots, and

wherein the starting symbol of the sidelink symbols included in each of the plurality of slots and the number of the sidelink symbols included in each of the plurality of slots are configured to be the same in the sidelink resource pool.

14. The first device of claim 13 , wherein the information related to the starting symbol of the sidelink symbols is in a form of a bit map.

15. A method for performing wireless communication by a second device, the method comprising:

receiving, from a first device, a sidelink-synchronization signal block (S-SSB),

wherein the S-SSB includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS) and a physical sidelink broadcast channel (PSBCH) including a time division duplex (TDD) slot configuration; and

receiving, from the first device, a physical sidelink shared channel (PSSCH) based on the information related to the TDD slot configuration in the PSBCH,

wherein information related to a TDD configuration is obtained,

wherein information related to a starting symbol of sidelink symbols and information related to a number of sidelink symbols is obtained,

wherein candidate resources to which a bitmap related to a sidelink resource pool is applied are configured based on the information related to the TDD configuration,

wherein the sidelink resource pool includes a plurality of slots, and

wherein the starting symbol of the sidelink symbols included in each of the plurality of slots and the number of the sidelink symbols included in each of the plurality of slots are configured to be the same in the sidelink resource pool.