Method and apparatus for interworking SIP communication waiting with circuit switching and packet switching nodes
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.
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Accused Products
Abstract
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.
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Citations
9 Claims
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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:
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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. - View Dependent Claims (3)
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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:
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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”
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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:
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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”
; andsending a first clearing message with the Cause information element set to cause #102.
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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. - View Dependent Claims (9)
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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”
.- View Dependent Claims (7)
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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”
; andsend a first clearing message with the Cause information element set to cause #102.
Specification