Method for transmitting uplink signal by terminal in wireless communication system, and apparatus therefor
Disclosed are a method and an apparatus for transmitting an uplink signal by a terminal in a wireless communication system supporting a non-terrestrial network (NTN) according to various embodiments. The method includes receiving system information for configuring a first K offset, receiving a control signal for configuring or updating a second K offset based on the first K offset, and transmitting the uplink signal based on the first K offset or the second K offset, wherein, based on the uplink signal being related to a random access channel (RACH), the uplink signal is transmitted based on the first K offset.
1. A method performed by a UE (User Equipment), the method comprising:
receiving system information including a first K_offset related to a K_offset for a non-terrestrial network (NTN);
receiving a control signal including an update value for updating the K_offset for the NTN;
based on an uplink signal being related to a RAR (Random Access Response), transmitting the uplink signal at a transmission timing determined based on the first K_offset without applying the update value; and
based on the uplink signal being not related to the RAR, transmitting the uplink signal at the transmission timing determined based on the K_offset obtained by applying the update value to the first K_offset.
2. The method of claim 1 , wherein the update value is included in a media access control element (MAC-CE) of the control signal.
3. The method of claim 2 , wherein the K_offset obtained by applying the update value to the first K_offset is applied x preconfigured slots after a time when an acknowledgment (ACK) for successful reception of the MAC-CE is transmitted.
4. The method of claim 1 , wherein the first K_offset is a value for configuring a cell-specific K_offset.
5. The method of claim 1 , wherein the uplink signal related to the RAR is an uplink signal scheduled by a RAR uplink grant an uplink signal scheduled by a fallbackRAR uplink grant, or an uplink signal including an acknowledgment (ACK) for the RAR.
6. The method of claim 1 , wherein the K_offset for the NTN is configured for each of a plurality of bandwidth parts (BWP).
7. The method of claim 1 , wherein the K_offset for the NTN is configured for each of a plurality of beam groups.
8. A UE (User Equipment) comprising:
a radio frequency (RF) transceiver; and
a processor connected to the RF transceiver,
wherein the processor controls the RF transceiver to:
receive system information including a first K_offset related to a K_offset for a non-terrestrial network (NTN);
receive a control signal including an update value for updating the K_offset for the NTN;
based on an uplink signal being related to a RAR (Random Access Response), transmitting the uplink signal at a transmission timing determined based on the first K_offset without applying the update value; and
based on the uplink signal being not related to the RAR, transmitting the uplink signal at the transmission timing determined based on the K_offset obtained by applying the update value to the first K_offset.
9. A non-transitory computer-readable medium recording a program code for performing the method according to claim 1 .