Section: 10.14.1 PDU Session Split at UPF during PDU session resource setup
Content: When a new PDU session needs to be established, the 5GC may provide two UL TEID addresses during PDU Session Resource Setup in order to allow for PDU session split. The MN may perform the SN Addition or the MN-initiated SN Modification procedure. If the MN decides to split the PDU session, the MN provides two DL TEID addresses and also the QoS flows associated with each tunnel. Figure 10.14.1-1: PDU Session Split at UPF during PDU session resource setup 1. The 5GC provides two UL TEID addresses during PDU Session Resource Setup, to be applied as the first UL tunnel on the NG-U interface and the additional NG-U tunnel in case the MN decides to split the PDU session. 2. The MN decides to setup two tunnels. The MN uses the SN Addition procedure (as described in 10.2.2) or the MN-initiated SN Modification procedure (as described in 10.3.2) up to step 6. 3. The MN provides a DL TEID address to be applied as the first and an additional DL tunnel address on the NG-U interface. The MN also provides which QoS flows are associated with which tunnel.