The present disclosure provides a method executed at UE, including: determining initiation of a radio resource control (RRC) connection reestablishment procedure or leaving RRC connected state; and performing the following operations on each of at least one cell group: suspending a service data adaptation protocol (SDAP) operation and/or storing an SDAP configuration in a corresponding cell group configuration; or releasing an SDAP entity used to execute the SDAP operation and/or the SDAP configuration in the corresponding cell group configuration. The present disclosure further provides corresponding UE.