Patent ID: 11432348

Abstract:
Selecting local gateways for VoWiFi and/or ViWiFi calls (voice traffic sessions) for a user equipment (UE) includes: receiving, by a routing node (evolved packet data gateway (ePDG)), a request to initiate the voice traffic session for the UE from a wireless node (WiFi router) communicatively coupled with the UE, the wireless node outside a cellular network; based on at least an internet protocol (IP) address of the wireless node or the UE, determining a geographical location of the UE; based on at least the geographical location of the UE, determining a tracking area code; based on at least the tracking area code, determining an IP address of a network gateway (user plane function (UPF) or packet data gateway (PGW) user plane function (PGW-U), and session management function (SMF) node or PGW control plane function (PGW-C)) proximate to the UE; and establishing the voice traffic session using the network gateway.