ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,701,422, issued on Aug. 4, was assigned to T-Mobile USA Inc. (Bellevue, Wash.).

"Gatekeeping for roaming WiFi callers" was invented by Joel Arends (Renton, Wash.), Nassereddine Sabeur (Bellevue, Wash.) and Saqib Badar (Bellevue, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Gatekeeping for roaming WiFi callers includes: receiving, by a first wireless network node, from a second wireless network node, an authentication request identifying a user equipment (UE) that is requesting a call over WiFi and identifying a network address of the UE; based on at least the network address of the UE, determining a location of the UE; based on at least the locat...