Patent ID: 8711846
Filing Date: 2014-04-29
Classification: H04W

Abstract:
1. A method for performing wireless communications, the method comprising: receiving an access gateway register request for a user equipment (UE), the access gateway register request indicating a network address for an access gateway and a subscriber identifier, the access gateway being configured to route user data therethrough, wherein the UE is a legacy CS device that lacks the functionality to communicate directly with a packet switched (PS) network; verifying that the UE was previously registered in a user database during a circuit switch (CS) attach procedure; and pursuant to said verification, storing the network address for the access gateway and transmitting a register acknowledgement message, wherein the CS attach procedure is performed by a home user agent which separates a CS attach request received from the UE into a session control component and a mobility component, the mobility component corresponding to the CS attach procedure and the session control component corresponding to an internet protocol (IP) multimedia subsystem (IMS) attach procedure.