5.43.4 Reporting of satellite backhaul to SMF

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 [3]. If AMF is aware that satellite backhaul category changes (e.g. at handover), the AMF reports the current Satellite backhaul category to SMF. The SMF reports it to the PCF when the "Satellite backhaul category change" PCRT was armed as specified in TS 23.503 [45], or notifies it to other NFs if requested as described in clause 5.2.8.3 of TS 23.502 [3]. When the backhaul network changes from a type of satellite to terrestrial network, the AMF reports that non-satellite backhaul network is used with the Satellite backhaul category.

Satellite backhaul category refers to the type of the satellite (i.e. GEO, MEO, LEO or OTHERSAT, DYNAMIC_GEO, DYNAMIC_MEO, DYNAMIC_LEO and DYNAMIC_OTHERSAT) used in the backhaul as specified in clause 5.4.3.39 of TS 29.571 [183]. The dynamic satellite backhaul category (i.e. DYNAMIC_GEO, DYNAMIC_MEO, DYNAMIC_LEO and DYNAMIC_OTHERSAT) refers that 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. Only a single backhaul category can be indicated.

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.