US Patent No. 10,602,483

MOBILE TERMINATED IMS CALLS ON DEVICES WHICH SUPPORT WI-FI AND CELLULAR RADIOS


Patent No. 10,602,483
Issue Date March 24, 2020
Title Mobile Terminated Ims Calls On Devices Which Support Wi-fi And Cellular Radios
Inventorship Ajoy K. Singh, Milpitas, CA (US)
Paul V. Flynn, Menlo Park, CA (US)
Syed Aon Mujtaba, Santa Clara, CA (US)
Vinay R. Majjigi, Sunnyvale, CA (US)
Wen Zhao, San Jose, CA (US)
Xiaowen Wang, Cupertino, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 10,602,483

1. A mobile device, comprising:at least one antenna;
a first radio, wherein the first radio is configured to perform cellular communication with a cellular network provided by a cellular carrier using at least one cellular radio access technology (RAT);
a second radio, wherein the second radio is configured to perform Wi-Fi communication with a Wi-Fi network;
at least one processor communicatively coupled to the first and second radios, wherein the mobile device, using the at least one processor, is configured to perform voice and/or data communications;
wherein the mobile device is configured to:
establish a first connection with a cellular carrier packet data network (PDN) over the Wi-Fi network;
acquire a first internet protocol (IP) address associated with the first connection to the cellular carrier PDN;
register, with an internet protocol multimedia subsystem (IMS) server, the first IP address associated with the first connection to the cellular carrier PDN;
establish a second connection to the cellular carrier PDN via the at least one cellular RAT over the cellular network;
provide, to the IMS server at a first time, information concerning a status of the first connection with the cellular carrier PDN over the Wi-Fi network;
wherein, in response to providing the information concerning the status and at a second time subsequent to the first time, upon occurrence of a mobile terminating call received by the IMS server from the cellular carrier while the mobile device is in a low power mode and connected to the Wi-Fi network, a first incoming call notification on the Wi-Fi network is transmitted to the mobile device using the first IP address and a second incoming call notification on the cellular network is transmitted to the mobile device using the first IP address, wherein operating in the low power mode comprises operating the second radio in a power save mode; and
wherein the mobile device is configured to receive and respond to at least one of the first or second incoming call notifications.