US Patent 9143537 Device registration in an IMS network

A network element for use in an IMS network is disclosed herein. The network element includes a communication interface operable to receive a SIP request message from a communication device, such as an SIP invite. The network element also includes a communication processor operable to process the SIP request message, extract registration information from a header of the SIP request message, and update a registration of the communication device with the IMS network based on the registration information.