Method, equipment and system for deregistering a wireless IP access network contact address

摘要

A method and equipment for deregistering a wireless IP access network contact address are provided. When a call corresponding to a common subscriber ID of a TE is received after the TE leaves an IP access network abnormally, the method and the equipment can avoid problems caused by still delivering the subsequent call from the IP access network according to an IP access network contact address associated with the common subscriber ID. The method includes notifying an IMS network to deregister a contact address of a TE in a first wireless IP access network through a current available access network of the TE if the contact address of the TE in the first wireless IP access network is not deregistered to the IMS network when the TE leaves the first wireless IP access network.