Patent ID: 8792480
Filing Date: 2014-07-29
Classification: H04L

Abstract:
1. A method comprising: receiving, by a proxy call session control function, a first signal from a single subscriber user equipment to register with the proxy call session control function, wherein the single subscriber user equipment is enabled to fork register to eligible serving-call session control functions, wherein a home subscriber server maintains a forking data field for the single subscriber user equipment; based on a second signal from the home subscriber server that the forking data field is set, choosing, by an interrogating call session control function, multiple eligible serving-call session control functions; receiving, at the proxy call session control function, multiple registration messages from the single subscriber user to the multiple eligible serving-call session control functions chosen by the interrogating call session control function; storing, by the proxy call session control function, a list of the multiple eligible serving-call session control functions; and recording, by the home subscriber server, a binding of fork registrations to each of the multiple eligible serving-call session control functions.