Section: 4.23.12.8.2 UE Triggered Service Request with I-SMF insertion/change/removal
Content: The following impact is applicable for UE triggered Service Request with I-SMF insertion in clause 4.23.4.3: - In step 8a, when an I-SMF is inserted, if EBI(s) have been allocated before but the SMF+PGW-C has not prepared the CN Tunnel Info for each EPS bearer, the SMF+PGW-C requests the PGW-U+UPF to allocate the CN Tunnel for each EPS bearer for PDU Session(s). PGW-U+UPF allocates the PGW-U tunnel info for the EPS bearer and sends it to the SMF+PGW-C. - In step 8c, the SMF+PGW-C provides also CN Tunnel Info for each EPS bearer to the I-SMF. NOTE: The CN Tunnel Info for each EPS bearer provided to the I-SMF is to prepare for UE mobility to EPC network so that the I-SMF does not need interact with the SMF+PGW-C to get the EPS bearer context(s) at mobility to EPC.