The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2021
Filed:
Mar. 22, 2019
Apple Inc., Cupertino, CA (US);
Sai Sravan Bharadwaj Karri, Morgan Hill, CA (US);
Sethuraman Gurumoorthy, San Jose, CA (US);
Sree Ram Kodali, Sunnyvale, CA (US);
Stephen C. Schweizer, Mountain View, CA (US);
Alexander Allahverdiev, Walnut Creek, CA (US);
Murtaza A. Shikari, Mountain View, CA (US);
Srirang A. Lovlekar, Cupertino, CA (US);
Vijay Venkataraman, Sunnyvale, CA (US);
Wanping Zhang, San Jose, CA (US);
Yifan Zhu, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Apparatuses, systems, and methods for improving efficiency in IMS registration and management in a wireless communication device, such as a UE. In some scenarios, the UE may, while implementing IMS services (e.g. for VoLTE) over a wireless communication link with a cellular network, determine that the wireless communication link is not performing at an acceptable level. In response, the UE may start a timer and buffer IMS SIP signaling messages while the timer is running. If the wireless communication link performance is restored to an acceptable level before expiration of the timer, the UE may transmit the buffered IMS SIP signaling messages. If the timer expires prior to restoration of the wireless communication link, the buffered messages may be cleared, and the UE may locally deregister from IMS registration and IMS PDN. In some scenarios, select IMS SIP signaling messages may be omitted or removed from the buffer.