Method and device for transmitting/receiving signal in wireless communication system
In the transmission of message A corresponding to a 2-step random access process or message 1 corresponding to a 4-step random access process, a method and a device for transmitting/receiving a signal in a wireless communication system, according to one embodiment of the present invention, use an option in which an RO for a PRACH transmission for each message is set differently, or an option in which an RO for a PRACH transmission for each message is shared and PI is set differently.
1. A method for performing a random access (RA) procedure by a user equipment (UE) in a wireless communication system, the method comprising:
determining which RA procedure is set among a 2-step RA procedure and a 4-step RA procedure based on a Reference Signal Received Power (RSRP) measured in a downlink bandwidth part (DL BWP);
based on the 2-step RA procedure being set, transmitting of a message A (msgA) including both a RA preamble and a physical uplink shared channel (PUSCH);
based on the 4-step RA procedure being set, transmitting a message 1 (msg1) consisting of the RA preamble;
establishing a Radio Resource Control (RRC) connection based on the RA procedure; and
based on (1) the RRC connection being established and (2) Discontinuous Reception (DRX) operation being configured, monitoring a Physical Downlink Control Channel (PDCCH) discontinuously using a DRX operation.
2. The method of claim 1 , wherein the level of the RSRP is measured based on a downlink reference signal.
3. The method of claim 1 , wherein, in the 2-step RA procedure, a transmission of the RA preamble is performed in an RA occasion (RO) among a plurality of ROs, and a resource for the PUSCH is determined in association with the RA.
4. The method of claim 3 , wherein the RO includes a time-frequency resource used for the transmission of the RA preamble, and the resource for the PUSCH includes at least a time-frequency resource, a scrambling identity (ID) or a demodulation reference signal (DMRS) resource.
5. A user equipment (UE) configured to perform a random access (RA) procedure in a wireless communication system, the UE comprising:
at least one radio frequency (RF) module;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
determining which RA procedure is set among a 2-step RA procedure and a 4-step RA procedure based on a level of Reference Signal Received Power (RSRP) measured in a downlink bandwidth part (DL BWP);
based on the 2-step RA procedure being set, transmitting of a message A (msgA) including both a RA preamble and a physical uplink shared channel (PUSCH);
based on the 4-step RA procedure being set, transmitting a message 1 (msg1) consisting of the RA preamble;
establishing a Radio Resource Control (RRC) connection based on the RA procedure; and
based on (1) the RRC connection being established and (2) Discontinuous Reception (DRX) operation being configured, monitoring a Physical Downlink Control Channel (PDCCH) discontinuously using a DRX operation.
6. The UE of claim 5 , wherein the level of the RSRP is measured based on a downlink reference signal.
7. The UE of claim 5 , wherein, in the 2-step RA procedure, a transmission of the RA preamble is performed in an RA occasion (RO) among a plurality of ROs, and a resource for the PUSCH is determined in association with the RA.
8. The UE of claim 7 , wherein the RO includes a time-frequency resource used for the transmission of the RA preamble, and the resource for the PUSCH includes at least a time-frequency resource, a scrambling identity (ID) or a demodulation reference signal (DMRS) resource.
9. A device used for a user equipment (UE) to perform a random access (RA) procedure 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, cause the at least one processor to perform operations comprising:
determining which RA procedure is set among a 2-step RA procedure and a 4-step RA procedure based on Reference Signal Received Power (RSRP) measured in a downlink bandwidth part (DL BWP);
based on the 2-step RA procedure being set, transmitting of a message A (msgA) including both a RA preamble and a physical uplink shared channel (PUSCH);
based on the 4-step RA procedure being set, transmitting a message 1 (msg1) consisting of the RA preamble;
establishing a Radio Resource Control (RRC) connection based on the RA procedure; and
based on (1) the RRC connection being established and (2) Discontinuous Reception (DRX) operation being configured, monitoring a Physical Downlink Control Channel (PDCCH) discontinuously using a DRX operation.
10. The device of claim 9 , wherein the level of the RSRP is measured based on a downlink reference signal.
11. The device of claim 9 , wherein, in the 2-step RA procedure, a transmission of the RA preamble is performed in an RA occasion (RO) among a plurality of ROs, and a resource for the PUSCH is determined in association with the RA.
12. The device of claim 11 , wherein the RO includes a time-frequency resource used for the transmission of the RA preamble, and the resource for the PUSCH includes at least a time-frequency resource, a scrambling identity (ID) or a demodulation reference signal (DMRS) resource.