This state is applicable for RRC_IDLE and RRC_INACTIVE state.
When camped normally, the UE shall perform the following tasks:
monitor the paging channel of the cell as specified in clause 7 according to information broadcast in SIB1;
monitor Short Messages transmitted with P-RNTI over DCI as specified in clause 6.5 in TS 38.331;
monitor relevant System Information as specified in TS 38.331;
perform necessary measurements for the cell reselection evaluation procedure;
execute the cell reselection evaluation process on the following occasions/triggers:
UE internal triggers, so as to meet performance as specified in TS 38.133;
When information on the BCCH used for the cell reselection evaluation procedure has been modified.
At reception of RRCRelease
message to transition the UE to RRC_IDLE or RRC_INACTIVE, UE shall attempt to camp on a suitable cell according to redirectedCarrierInfo
if included in the RRCRelease
message. If the UE cannot find a suitable cell, the UE is allowed to camp on any suitable cell of the indicated RAT. If the RRCRelease
message does not contain the redirectedCarrierInfo
, UE shall attempt to select a suitable cell on an NR carrier. If no suitable cell is found according to the above, the UE shall perform cell selection using stored information in order to find a suitable cell to camp on.
When returning to RRC_IDLE state after UE moved to RRC_CONNECTED state from camped on any cell
state, UE shall attempt to camp on an acceptable cell according to redirectedCarrierInfo
, if included in the RRCRelease
message. If the UE cannot find an acceptable cell, the UE is allowed to camp on any acceptable cell of the indicated RAT. If the RRCRelease
message does not contain redirectedCarrierInfo
UE shall attempt to select an acceptable cell on an NR frequency. If no acceptable cell is found according to the above, the UE not in SNPN AM shall continue to search for an acceptable cell of any PLMN in state any cell selection