Method and device for transmitting location information in NR V2X

1. A method for transmitting, by a first apparatus, location information in a wireless communication system, the method comprising:

obtaining location information comprising i) an estimated distance between the first apparatus and a second apparatus, and ii) an accuracy of the estimated distance;

determining a periodicity of transmission of the location information based on the accuracy of the estimated distance, wherein the periodicity is determined to be longer as the accuracy increases, and determined to be shorter as the accuracy decreases;

comparing the accuracy of the estimated distance with a threshold; and

based on the accuracy of the estimated distance being lower than the threshold, transmitting the location information to the second apparatus with the determined periodicity,

wherein the method further comprises:

transmitting a physical sidelink control channel (PSCCH) to the second apparatus; and

transmitting a physical sidelink shared channel (PSSCH) related to the PSCCH to the second apparatus,

wherein the PSSCH includes sidelink control information (SCI),

wherein the SCI includes the location information,

wherein the first apparatus transmits sidelink synchronization signals to the second apparatus for synchronization,

wherein the sidelink synchronization signals comprise a sidelink primary synchronization signal (S-PSS) and a sidelink secondary synchronization signal (S-SSS), and

wherein the S-PSS, the S-SSS and a physical sidelink broadcast channel (PSBCH) form a sidelink synchronization signal block (S-SSB).

2. The method of claim 1 , wherein the location information is transmitted based on a request by the second apparatus.

3. The method of claim 1 , wherein the location information further comprises at least one of range, location, horizontal velocity, or height.

4. The method of claim 1 , further comprising:

determining amount of transmission of the location information based on the accuracy.

5. The method of claim 1 , wherein the location information comprises delta information with respect to a last reported location information.

6. A first apparatus for performing wireless communication, the first apparatus 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 perform operations comprising:

obtaining location information comprising i) an estimated distance between the first apparatus and a second apparatus, and ii) an accuracy of the estimated distance;

determining a periodicity of transmission of the location information based on the accuracy of the estimated distance, wherein the periodicity is determined to be longer as the accuracy increases, and determined to be shorter as the accuracy decreases;

comparing the accuracy of the estimated distance with a threshold; and

based on the accuracy of the estimated distance being lower than the threshold, transmitting the location information to the second apparatus with the determined periodicity,

wherein the operations further comprise:

transmitting a physical sidelink control channel (PSCCH) to the second apparatus; and

transmitting a physical sidelink shared channel (PSSCH) related to the PSCCH to the second apparatus,

wherein the PSSCH includes sidelink control information (SCI),

wherein the SCI includes the location information,

wherein the first apparatus transmits sidelink synchronization signals to the second apparatus for synchronization,

wherein the sidelink synchronization signals comprise a sidelink primary synchronization signal (S-PSS) and a sidelink secondary synchronization signal (S-SSS), and

wherein the S-PSS, the S-SSS and a physical sidelink broadcast channel (PSBCH) form a sidelink synchronization signal block (S-SSB).

7. An apparatus configured to control a first user equipment (UE), the apparatus comprising:

one or more processors; and

one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to perform operations comprising:

obtaining location information comprising i) an estimated distance between the first UE and a second UE, and ii) an accuracy of the estimated distance;

determining a periodicity of transmission of the location information based on the accuracy of the estimated distance, wherein the periodicity is determined to be longer as the accuracy increases, and determined to be shorter as the accuracy decreases;

comparing the accuracy of the estimated distance with a threshold; and

based on the accuracy of the estimated distance being lower than the threshold, transmitting the location information to the second UE with the determined periodicity,

wherein the operations further comprise:

transmitting a physical sidelink control channel (PSCCH) to the second UE; and

transmitting a physical sidelink shared channel (PSSCH) related to the PSCCH to the second UE,

wherein the PSSCH includes sidelink control information (SCI),

wherein the SCI includes the location information,

wherein the first UE transmits sidelink synchronization signals to the second UE for synchronization,

wherein the sidelink synchronization signals comprise a sidelink primary synchronization signal (S-PSS) and a sidelink secondary synchronization signal (S-SSS), and

wherein the S-PSS, the S-SSS and a physical sidelink broadcast channel (PSBCH) form a sidelink synchronization signal block (S-SSB).