Patent ID: 8913585

Claim:
A method for providing IP Multimedia Subsystem (IMS) session continuity to a User Equipment (UE) across a plurality of communication networks, the UE moving from a first communication network to a second communication network, the method comprising: generating, by the UE, a complimentary private user identity associated with a public user identity, wherein the public user identity is further associated with a private user identity, and wherein the public user identity and the private user identity are registered by the UE with the first communication network using a first address; obtaining, by the UE, a second address from the second communication network when the UE moves from the first communication network to the second communication network; registering, by the UE, the public user identity with the first communication network using the second address and the complimentary private user identity; and registering the public user identity and the private user identity with the first communication network using a third address when the UE moves from the second communication network to a third communication network.