METHOD AND APPARATUS FOR INTERWORKING SIP COMMUNICATION WAITING WITH CIRCUIT SWITCHING AND PACKET SWITCHING NODES

• US 20140010118A1
• Filed: 08/22/2013
• Published: 01/09/2014
• Est. Priority Date: 10/29/2008
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Bakker, Jan Hendrik Lucas
• Granted Patent: US 9,282,444 B2
• Time in Patent Office: Days
• US Class Current: 370/259
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1095 Inter-network session transfer or sharing
• CPC Class Codes: H04L 65/1096 Supplementary features, e.g. call forwarding or call holding systems providing special services or facilities to telephony subscribers H04M3/42
• CPC Class Codes: H04M 3/428 Arrangements for placing incoming calls on hold
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold

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.

Claims

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 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, 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;

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.

3. The method of claim 1, 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.

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 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, 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;

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, 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”

.

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 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, 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;

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 perform the steps of;

receiving 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, 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;

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.

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 perform the steps of;

receiving at the MSC 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, 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;

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, 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”

.

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 perform the steps of;

receiving at the MSC 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, 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;

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.