Section: 5.8.9.9.2 Actions related to transmission of UuMessageTransferSidelink message
Content: The L2 U2N Relay UE initiates the Uu message transfer procedure when at least one of the following conditions is met: 1> upon receiving Paging message related to the connected L2 U2N Remote UE from network (including Paging message within RRCReconfiguration message); 1> upon acquisition of the SIB(s) requested by the connected L2 U2N Remote UE (as indicated in sl-RequestedSIB-List in the RemoteUEInformationSidelink) or upon receiving the updated SIB(s) from network which has been requested by the connected L2 U2N Remote UE; 1> upon acquisition of the posSIB(s) requested by the connected L2 U2N Remote UE (as indicated in sl-RequestedPosSIB-List in the RemoteUEInformationSidelink) or upon receiving the updated posSIB(s) from network which have been requested by the connected L2 U2N Remote UE; 1> upon unsolicited SIB1 forwarding to the connected L2 U2N Remote UE or upon receiving the updated SIB1 from network; For each associated L2 U2N Remote UE, the L2 U2N Relay UE shall set the contents of UuMessageTransferSidelink message as follows: 1> include sl-PagingDelivery if the Paging message received from network containing the ue-Identity of the L2 U2N Remote UE; 1> include sl-SIB1-Delivery if any of the conditions for initiating Uu message transfer procedure related to SIB1 are met; 1> include sl-SystemInformationDelivery if any of the conditions for initiating Uu message transfer procedure related to System Information are met; 1> submit the UuMessageTransferSidelink message to lower layers for transmission. NOTE: The L2 U2N Relay UE may perform unsolicited forwarding of SIB1 to the L2 U2N Remote UE based on UE implementation.