Patent ID: 10305942

Abstract:
A Session Initiation Protocol (SIP) server within an Internet Protocol Multimedia Subsystem (IMS) network may be associated with multiple, different identifiers. In some embodiments, a process for implementing the multiple, different identifiers of the SIP server within the IMS network may include maintaining, at a home subscriber server (HSS), a first identifier of a Session Initiation Protocol (SIP) server in association with a user, and inserting a second identifier of the SIP server in a message header of a SIP request during a wireless communication session of the user. In some embodiments, the first identifier of the SIP server may be transmitted over Diameter (Cx) interfaces, while the second identifier of the SIP server may be transmitted over SIP (ISC) interfaces. Using multiple identifiers of a SIP server allows for minimizing downtime while restoring the user's wireless communication session in the event of a failure of the SIP server.