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 used for sidelink and information related to a number of symbols used for sidelink;

determining a set of slots assigned to a sidelink resource pool, based on a bitmap related to the sidelink resource pool and 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 sidelink TDD configuration; and

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

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

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

2. The method of claim 1 , wherein the information related to the starting symbol used for sidelink 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 l, wherein a resource for transmitting the S-SSB is pre-configured by a higher layer.

5. The method of claim 1 , wherein a resource for transmitting the S-SSB includes a resource in a frequency domain and in 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 sidelink TDD 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 sidelink TDD 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 set of slots.

12. The method of claim 11 , wherein resource 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 used for sidelink and information related to a number of symbols used for sidelink;

determine a set of slots assigned to a sidelink resource pool, based on a bitmap related to the sidelink resource pool and 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 sidelink TDD configuration, and

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

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

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

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

15. A device adapted to control a first user equipment (UE), the device comprising:

one or more processors; and

one or more memories being operably connectable to the one or more processors and storing instructions, 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 used for sidelink and information related to a number of symbols used for sidelink;

determine a set of slots assigned to a sidelink resource pool, based on a bitmap related to the sidelink resource pool and based on the information related to the TDD configuration;

transmit, to a second UE, 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 sidelink TDD configuration, and

transmit, to the second UE, a physical sidelink shared channel (PSSCH) based on the sidelink TDD configuration in the PSBCH,

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

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