Patent ID: 8954111
Filing Date: 2015-02-10
Classification: H04W,Y02D

Abstract:
1. A method of operating a wireless device having at least a first radio system for a first subscriber identity module (SIM) channel and a second radio system for a second SIM channel, the method comprising: determining from the first and second SIM channels being in an idle state that the first radio system is configured to provide service for both the first SIM channel and the second SIM channel that are currently serviced by the first and second radio systems respectively; transferring servicing of the second SIM channel from the second radio system to the first radio system including transferring a SIM context for the second SIM channel from the second radio system to the first radio system when it is determined that the first radio system is configured to provide service for both the first SIM channel and the second SIM channel, wherein the SIM context includes configuration and state information that describes ongoing operations of the second SIM channel including temporary identifiers and security parameters of the wireless device; and, after servicing of the second SIM channel has been transferred, shutting down at least a part of the second radio system to reduce the power consumed by the second radio system.