Patent ID: 9084147
Filing Date: 2015-07-14
Classification: H04W

Abstract:
1. A method of wireless communication comprising: establishing a first cellular communication link, using a first instance of a radio protocol stack of a user equipment (UE), by attaching to a first cellular network managed by a mobile network operator (MNO) based on a subscriber identifier of the UE; establishing a second cellular communication link, using a second instance of the radio protocol stack, by attaching to a second cellular network managed by a non-MNO based on the subscriber identifier of the UE; and maintaining the first cellular communication link concurrently with the second cellular communication link, wherein the first cellular network continues to function as a serving public land mobile network (PLMN) of the UE after establishing of the second cellular communication link, and wherein the UE maintains a first security context for communication with the first cellular network within a subscriber identifier module (SIM) card of the UE and a second security context for communication with the second cellular network outside the SIM card of the UE.