Section: 5.3.3.3 Actions related to transmission of RRCSetupRequest message
Content: The UE shall set the contents of RRCSetupRequest message as follows: 1> set the ue-Identity as follows: 2> if upper layers provide a 5G-S-TMSI: 3> set the ue-Identity to ng-5G-S-TMSI-Part1; 2> else: 3> draw a 39-bit random value in the range 0..239-1 and set the ue-Identity to this value; NOTE 1: Upper layers provide the 5G-S-TMSI if the UE is registered in the TA of the current cell. 1> if the establishment of the RRC connection is the result of release with redirect with mpsPriorityIndication (either in NR or E-UTRAN): 2> set the establishmentCause to mps-PriorityAccess; 1> else: 2> set the establishmentCause in accordance with the information received from upper layers; NOTE 2: In case the L2 U2N Relay UE initiates RRC connection establishment triggered by reception of message from a L2 U2N Remote UE via SL-RLC0 or SL-RLC1 as specified in 5.3.3.1a, the L2 U2N Relay UE sets the establishmentCause by implementation, but it can only set the emergency, mps-PriorityAccess, or mcs-PriorityAccess as establishmentCause if the same cause value is in the message received from the L2 U2N Remote UE via SL-RLC0. 1> if ta-Report or ta-ReportATG is configured with value enabled and the UE supports TA reporting: 2> indicate TA report initiation to lower layers; The UE shall submit the RRCSetupRequest message to lower layers for transmission. If the UE is an (e)RedCap UE and the (e)RedCap-specific initial downlink BWP is not associated with CD-SSB, the UE may continue cell re-selection related measurements as well as cell re-selection evaluation, otherwise the UE shall continue cell re-selection related measurements as well as cell re-selection evaluation. If the conditions for cell re-selection are fulfilled, the UE shall perform cell re-selection as specified in 5.3.3.6. NOTE 3: For L2 U2N Remote UE in RRC_IDLE, the cell (re)selection procedure as specified in TS 38.304[ NR; User Equipment (UE) procedures in Idle mode and in RRC Inactive state ]  [20] and relay (re)selection procedure as specified in 5.8.15.3 are performed independently and up to UE implementation to select either a cell or a L2 U2N Relay UE.