Section: 5.43.4 Reporting of satellite backhaul to SMF
Content: If the AMF is aware that a satellite backhaul is used towards 5G AN, the AMF may report this to SMF as part of the PDU Session establishment procedure as described in clause 4.3.2 of TS 23.502[ Procedures for the 5G System (5GS) ]  [3]. If AMF is aware that satellite backhaul category changes (e.g. at handover), the AMF reports the current satellite backhaul category and indicates the satellite backhaul category change to SMF. Satellite backhaul category refers to the type of the satellite (i.e. GEO, MEO, LEO or OTHERSAT, DYNAMIC_GEO, DYNAMIC _MEO, DYNAMIC _LEO, DYNAMIC _OTHERSAT) used in the backhaul as specified in clause 5.4.3.39 of TS 29.571[ 5G System; Common Data Types for Service Based Interfaces; Stage 3 ]  [183]. Only a single backhaul category can be indicated. If dynamic satellite backhaul is used by the NG-RAN, i.e. capabilities (latency and/or bandwidth) of the satellite backhaul change over time due to e.g. use of varying inter-satellite links as part of backhaul, the AMF notifies the SMF of the corresponding dynamic satellite backhaul category to serve the PDU Session and the SMF can notify it to other NFs as described in clause 5.2.8.3 of TS 23.502[ Procedures for the 5G System (5GS) ]  [3]. NOTE: It is assumed that the AMF can determine the Satellite backhaul category for the notification to the SMF based on local configuration, e.g. based on Global RAN Node IDs associated with satellite backhaul.