×

Method and apparatus for interworking SIP communication waiting with circuit switching and packet switching nodes

  • US 9,282,444 B2
  • Filed: 08/22/2013
  • Issued: 03/08/2016
  • Est. Priority Date: 10/29/2008
  • Status: Active Grant
First Claim
Patent Images

1. A method for interworking a session by a Mobile Switching Center (MSC) server enhanced for IP Multimedia Subsystem (IMS) Centralized Services (ICS), the method comprising:

  • receiving at the MSC server a Session Initiation Protocol (SIP) invite message for a user equipment (UE) involved in a call being served in a circuit switched (CS) domain by the MSC server, wherein the SIP invite message is received from an IMS network comprising a call waiting application server;

    when the SIP invite message comprises a MIME body including a communication-waiting indication element, the MSC server;

    sending to the UE a CS setup message comprising an information element indicating a call-waiting-tone-on, andstoring an indication that the session includes a call waiting application server;

    receiving a CS message from the UE including call waiting information; and

    sending a SIP 4XX response message to the IMS network, the SIP 4XX response message including message information mapped from the call waiting information.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×