5.5.3.2 UE reachability in CM-CONNECTED

This clause applies to Non-3GPP access network corresponding to the Untrusted Non-3GPP access network, to the Trusted Non-3GPP access network and to the W-5GAN. In the case of W-5GAN the UE mentioned in this clause corresponds to 5G-RG and to W-AGF in the case of support of FN-RG. In the case of N5CW devices access 5GC via trusted WLAN access networks, the UE mentioned in this clause corresponds to TWIF.

For a UE in CM-CONNECTED state:

• the AMF knows the UE location on a N3IWF, TNGF, TWIF and W-AGF node granularity.
• the N3IWF, TNGF, TWIF and W-AGF releases the N2 connection when UE becomes unreachable from N3IWF, TNGF, TWIF and W-AGF point of view, i.e. upon Non-3GPP Access Connection release.