Patent ID: 8527759

Claim:
An IP Multimedia Subsystem (IMS) User Equipment (UE), comprising: searching circuitry configured for searching, based on Universal Plug and Play (UPnP) technology, a UPnP network for a host device that has a UPnP service configured to provide IMS subscription information and a first encryption key, the first encryption key being shared with an IMS application server (AS) in an IMS network via a Bootstrapping Server Function (BSF); establishing circuitry configured for establishing a session with the host device discovered by the searching circuitry; subscription retrieving circuitry configured for retrieving, from the UPnP service of the host device via the session, the IMS subscription information; registering circuitry configured for registering with the IMS network using the IMS subscription information; key retrieving circuitry configured for retrieving, from the UPnP service of the host device via the session, the first encryption key by sending identity of the IMS AS to the host device via the session; and communicating circuitry configured for performing encrypted communication with the IMS AS using the first encryption key.