Patent ID: 9276909
Filing Date: 2016-03-01
CPC Classification: H04L,H04W

Claim Text:
1. A method for wireless communication, comprising: performing a security procedure with a wireless network of a first network type for a first session and generating user equipment (UE) security context data at a UE; using the UE security context data for secure communication with the wireless network during the first session; storing the UE security context data at the UE upon termination of the first session; de-registering at the end of the first session and powering down after the first session; and powering up the UE and using the stored UE security context data for registration with the wireless network of the first network type for a second session following the first session; wherein the stored UE security context data comprises at least one of a cipher key (CK) used for ciphering and an integrity key (IK) used for integrity protection.