Method performed by user equipment, and user equipment for ensuring correctness of data transmission

Abstract

Provided in the present invention is a method performed by user equipment (UE), including: receiving, by the UE acting as remote UE by means of relay UE, a radio resource control (RRC) release message transmitted by a base station; and upon receiving the RRC release message, performing a first action, and transmitting, to the relay UE, a PC5-RRC message including a first indication, the first action including one or a plurality of the following: re-establishing or releasing a PC5 RLC entity, i.e., a PC5 radio link control entity, for bearing a Uu RB, i.e., a Uu radio bearer, between the remote UE and the base station; re-establishing or releasing a PC5 RLC entity for sidelink relay; releasing a logical channel for bearing a Uu RB between the remote UE and the base station; releasing a PC5 RLC entity for sidelink relay; resetting or releasing PC5 MAC, i.e., PC5 Medium Access Control, associated with the relay UE; resetting or releasing PC5 MAC corresponding to a logical channel for sidelink relay; and resetting or releasing PC5 MAC corresponding to a logical channel for bearing a Uu RB between the remote UE and the base station.