Method and apparatus for interworking SIP communication waiting with circuit switching and packet switching nodes
View Patent ↗A method and apparatus 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 an invite message and the MSC sending a setup message comprising an information element indicating a call waiting tone on when the invite message comprises a call waiting indication.
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, and
storing 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.
2. 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, and
storing an indication that the session includes a call waiting application server;
when a timer expires and the indication that the session includes a call waiting application server is stored in the MSC server, sending a SIP 4XX response message to the IMS network, the SIP 4XX response message including a Reason header field with a cause set to “19”.
3. The method of claim 1 , where said SIP 4XX response message is a final response prior to expiry of any timers associated with service logic in at least one of a Communication Waiting (CW) and a Communication Diversion (CDIV) application server.
4. 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, and
storing an indication that the session includes a call waiting application server;
receiving a request with a Reason header field with the protocol set to “SIP” and the cause set to “408”; and
sending a first clearing message with the Cause information element set to cause #102.
5. An apparatus for interworking a session by a Mobile Switching Center (MSC) server enhanced for IP Multimedia Subsystem (IMS) Centralized Services (ICS), the apparatus comprising:
an MSC server configured to:
receive 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:
send to the UE a CS setup message comprising an information element indicating a call-waiting-tone-on;
receive a CS message from the UE including call waiting information; and
send a SIP 4XX response message to the IMS network, the SIP 4XX response message including message information mapped from the call waiting information.
6. An apparatus for interworking a session by a Mobile Switching Center (MSC) server enhanced for IP Multimedia Subsystem (IMS) Centralized Services (ICS), the apparatus comprising:
an MSC server configured to:
receive 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:
send to the UE a CS setup message comprising an information element indicating a call-waiting-tone-on, and
store an indication that the session includes a call waiting application server;
when a timer expires and the indication that the session includes a call waiting application server is stored in the MSC server, send a SIP 4XX response message to the IMS network, the SIP 4XX response message including a Reason header field with a cause set to “19”.
7. The apparatus of claim 6 , where said SIP 4XX response is a final response prior to expiry of any timers associated with service logic in at least one of a Communication Waiting (CW) and a Communication Diversion (CDIV) application server.
8. An apparatus for interworking a session by a Mobile Switching Center (MSC) server enhanced for IP Multimedia Subsystem (IMS) Centralized Services (ICS), the apparatus comprising:
an MSC server configured to:
receive 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:
send to the UE a CS setup message comprising an information element indicating a call-waiting-tone-on, and
store an indication that the session includes a call waiting application server;
receive a request with a Reason header field with the protocol set to “SIP” and the cause set to “408”; and
send a first clearing message with the Cause information element set to cause #102.
9. The apparatus of claim 5 , wherein the MSC server is configured to:
when the SIP invite message comprises a MIME body including a communication-waiting indication element, store an indication that the session includes a call waiting application server.