Patent ID: 9001730
Filing Date: 2015-04-07
Classification: H04L,H04W

Abstract:
1. A method, comprising: transmitting or receiving a text message originating from a user terminal associated with an IP multimedia system (IMS) subscriber; wherein the IMS subscriber is registered in an IMS network by registering in the IMS network a first contact address of the user terminal associated with a circuit switched communication capability of the user terminal for regular communication purposes including for voice calls, and registering in the IMS network a second contact address of the user terminal associated with the circuit switched communication capability of the user terminal for messaging purposes, wherein a mobile switching center (MSC) receiving an originating text message from the IMS subscriber comprises session initiation protocol (SIP) signaling capability, and the IMS subscriber is registered in the circuit switched network as a multimedia subscriber, the method further comprising: converting the text message into a SIP message, and delivering the SIP message to a serving call session control function (S-CSCF) associated with the IMS subscriber.