Selecting local gateways for VoWiFi and ViWiFi

A system for selecting a gateway for a voice traffic session for a user equipment (UE), the system comprising:

• a processor;
• and
• a computer-readable medium storing instructions that are operative upon execution by the processor to:
• receive, by a routing node, a request to initiate the voice traffic session for the UE from a wireless node communicatively coupled with the UE, the wireless node outside a cellular network, wherein the routing node comprises an evolved packet data gateway (ePDG), and wherein the wireless node comprises a WiFi router;
• based on at least an internet protocol (IP) address of the wireless node or the UE, determine a geographical location of the UE;
• based on at least the geographical location of the UE, determine a tracking area code;
• based on at least the tracking area code, determine an IP address of a network gateway proximate to the UE, wherein the network gateway comprises a user plane function (UPF) node or a packet data gateway (PGW) user plane function (PGW-U) node, and wherein the network gateway further comprises a session management function (SMF) node or a PGW control plane function (PGW-C) node;
• and
• establish the voice traffic session using the network gateway.

One or more computer storage devices having computer-executable instructions stored thereon for selecting a gateway for a voice traffic session for a user equipment (UE), which, on execution by a computer, cause the computer to perform operations comprising:

• receiving, by a routing node, a request to initiate the voice traffic session for the UE from a wireless node communicatively coupled with the UE, the wireless node outside a cellular network, wherein the routing node comprises an evolved packet data gateway (ePDG), and wherein the wireless node comprises a WiFi router;
• 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 proximate to the UE, wherein the network gateway comprises a user plane function (UPF) node or a packet data gateway (PGW) user plane function (PGW-U) node, and wherein the network gateway further comprises a session management function (SMF) node or a PGW control plane function (PGW-C) node;
• and
• establishing the voice traffic session using the network gateway.