Method for transmitting and receiving signals in wireless communication system, and device supporting same
The present disclosure relates to a wireless communication system, and specifically provides a method and a device therefor, the method comprising: receiving first configuration information for transmitting a sounding reference signal (SRS); performing a channel access procedure (CAP) on the basis of the first configuration information; acquiring a time period for the SRS transmission from an Nth symbol on the basis of a successful CAP in the Nth symbol; performing the SRS transmission within the time period; transmitting, within the time period, second configuration information for triggering positioning reference signal (PRS) transmission in at least one base station included in a cell group; and receiving a PRS from the at least one base station within the time period.
1. A method of receiving a positioning reference signal (PRS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving information related to a sounding reference signal (SRS);
determining SRS sequences of the SRS related to a Transmission and Reception Point (TRP) group including a plurality of first TRPs;
performing a channel access procedure (CAP) based on the information related to the SRS;
acquiring Channel Occupancy Time (COT) based on the CAP being sensed as idle;
transmitting, to the plurality of first TRPs and at least one second TRP, the SRS having the SRS sequences; and
receiving, from the plurality of first TRPs among the plurality of first TRPs and the at least one second TRP, PRSs within the COT based on the SRS sequences, wherein the at least one second TRP is not included in the TRP group.
2. The method according to claim 1 , wherein the TRP group includes a first TRP having a serving cell and a second TRP having a neighboring cell.
3. The method according to claim 2 , wherein transmitting the SRS comprises:
transmitting, to the first TRP, the SRS based on a timing advanced (TA) value received from the serving cell, and
transmitting, to the second TRP, the SRS, the SRS based on a TA value preconfigured for the TRP group.
4. The method according to claim 1 , wherein the information includes:
a starting symbol index (M) of the SRS; and
a number (K) of symbols where the SRS transmitted.
5. The method according to claim 4 ,
wherein based on a value N being greater than the value of M, the SRS sequences are shifted by a value N-M on a frequency axis in the N-th symbol, and
wherein N is a starting symbol index of the COT and is a positive integer.
6. The method according to claim 4 ,
wherein based on a value N being greater than the value of M, the SRS sequences mapped in an M-th symbol to an (N−1)-th symbol are punctured and the SRS sequences punctured in the M-th symbol to the (N−1)-th symbol are mapped to an (M+K)-th symbol to a (K+N−1)-th symbol, and
wherein N is a starting symbol index of the COT and is a positive integer.
7. A user equipment (UE) of receiving a positioning reference signal (PRS) in a wireless communication system, the UE comprising:
at least one processor;
at least one transceiver; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving, through the at least one transceiver, information related to a sounding reference signal (SRS);
determining SRS sequences of the SRS related to a Transmission and Reception Point (TRP) group including a plurality of first TRPs;
performing a channel access procedure (CAP) based on the information related to the SRS;
acquiring Channel Occupancy Time (COT) based on the CAP being sensed as idle;
transmitting, to the plurality of first TRPs and at least one second TRP, the SRS having the SRS sequences, through the at least one transceiver; and
receiving, from the plurality of first TRPs among the plurality of first TRPs and the at least one second TRP, PRSs within the COT based on the SRS sequences, through the at least one transceiver, wherein the at least one second TRP is not included in the TRP group.
8. The UE according to claim 7 , wherein the UE is configured to communicate with at least one of a network and another autonomous vehicle other than the UE.
9. A device of receiving a positioning reference signal (PRS) in a wireless communication system, the device comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving information related to a sounding reference signal (SRS);
determining SRS sequences of the SRS related to a Transmission and Reception Point (TRP) group including a plurality of first TRPs;
performing a channel access procedure (CAP) based on the information related to the SRS;
acquiring Channel Occupancy Time (COT) based on the CAP being sensed as idle;
transmitting, to the plurality of first TRPs and at least one second TRP, the SRS having the SRS sequences; and
receiving, from the plurality of first TRPs among the plurality of first TRPs and the at least one second TRP, PRSs within the COT based on the SRS sequences,
wherein the at least one second TRP is not included in the TRP group.
10. A non-transitory computer-readable recording medium configured to store at least one computer program including instructions that enable at least one processor to perform operations by executing the instructions, the operation comprising:
receiving information related to a sounding reference signal (SRS);
determining SRS sequences of the SRS related to a Transmission and Reception Point (TRP) group including a plurality of first TRPs;
performing a channel access procedure (CAP) based on the information related to the SRS;
acquiring Channel Occupancy Time (COT) based on the CAP being sensed as idle;
transmitting, to the plurality of first TRPs and at least one second TRP, the SRS having the SRS sequences; and
receiving, from the plurality of first TRPs among the plurality of first TRPs and the at least one second TRP, PRSs within the COT based on the SRS sequences,
wherein the at least one second TRP is not included in the TRP group.