US 11,706,607 B1
Location based routing that bypasses circuit-based networks
Jason Cataquis, Bellevue, WA (US); and Dennis Romero, Mine Hill, NJ (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on Jun. 16, 2021, as Appl. No. 17/349,620.
Int. Cl. H04W 40/00 (2009.01); H04W 8/18 (2009.01); H04W 8/26 (2009.01); H04W 4/02 (2018.01); H04W 4/029 (2018.01)
CPC H04W 8/183 (2013.01) [H04W 4/023 (2013.01); H04W 4/029 (2018.02); H04W 8/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for wireless communications, comprising:
receiving, by a network node in a communication network, a packet associated with a long-distance call that has been initiated for a wireless user device,
wherein the communications network includes an Internet Protocol (IP) Multimedia Subsystem (IMS) layer;
determining, by the network node, location information carried in a header of the packet,
wherein the header of the packet comprises a P-Access-Network-Info (PANI) header, and
wherein the location information comprises a Tracking Area Code (TAC);
determining, by the network node using a mapping between locations and Major Trading Area (MTA) values, an MTA value corresponding to the location information carried in the header,
wherein the determining includes mapping between the TAC and the MTA, and
wherein the MTA value is used for route index analysis for identifying an outgoing Session Initiation Protocol (SIP) route by employing at least a high byte value of the TAC; and
routing, by the network node based on the MTA value, the packet using a routing path that bypasses a circuit-switched based network,
wherein the routing enables direct routing of the long-distance call via the IMS layer, and
wherein the routing uses the location information carried in the header of the packet for communication with a peer IMS layer of a different wireless network, thereby bypassing the circuit-switched network.