System and method for consolidating media signaling to facilitate internet protocol (IP) telephony

• US 7,596,150 B2
• Filed: 02/27/2006
• Issued: 09/29/2009
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Fry, Steven G., Kumarasamy, Parameswaran, Baird, Randall B.
• Primary Examiner(s): Kuntz; Curtis
• Assistant Examiner(s): NGUYEN, PHUNG HOANG JOSEPH
• Application Number:
  US11/363,810
• Publication Number:
  US 20070201448A1
• Time in Patent Office: 1,310 Days
• Field of Search: 370/352, 370/401, 370/466, 370/522, 370/356
• US Class Current: 370/466
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/1033 Signalling gateways
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related

Abstract

A system and method for consolidating media signaling to facilitate IP telephony includes receiving a first message exchange in a first protocol from a first endpoint to negotiate a media path with a second endpoint. It is determined to consolidate the first message exchange with additional message exchanges received from the first endpoint in the first protocol. A second message exchange is received in the first protocol from the first endpoint, and information derived from the first message exchange and the second message exchange is consolidated. A first message exchange in a second protocol is initiated to the second endpoint according to the information consolidated from the first and second message exchanges in the first protocol. One or more media flows is facilitated over the media path between the first and second endpoints according to the first and second message exchanges in the first protocol and the first message exchange in the second protocol.

Claims

1. A method for consolidating media signaling to facilitate Internet Protocol (IP) telephony, comprising:

receiving a first message exchange in a first protocol from a first endpoint to open a first unidirectional media connection by negotiating a media path with a second endpoint;

determining to consolidate the first message exchange with additional message exchanges received from the first endpoint in the first protocol, wherein determining to consolidate the first message exchange with the additional message exchanges comprises;

activating a timer to begin consolidation, wherein the timer expires according to a time period; and

determining whether the timer expires;

reactivating the timer to consolidate additional message exchanges received from the first endpoint if the timer expires and if additional message exchanges can be consolidated;

receiving a second message exchange in the first protocol from the first endpoint to open a second unidirectional media connection;

consolidating information derived from the first message exchange and the second message exchange within the time period;

initiating a first message exchange in a second protocol to the second endpoint according to the information consolidated from the first and second message exchanges in the first protocol, wherein the first message exchange in the second protocol opens a bidirectional media connection;

facilitating one or more unidirectional media flows over the media path between the first and second endpoints according to a message exchange in the first protocol if the first and second message exchanges in the first protocol are not consolidated within the time period; and

facilitating one or more bidirectional media flows over the media path between the first and second endpoints according to the first and second message exchanges in the first protocol and the first message exchange in the second protocol if the first and second message exchanges in the first protocol are consolidated.

2. The method of claim 1, wherein the first endpoint is an H.323 endpoint and the first protocol is H.323, and the second endpoint is a Session Initiation Protocol (SIP) endpoint and the second protocol is SIP.

3. The method of claim 1, wherein the first endpoint is a SIP endpoint and the first protocol is SIP, and the second endpoint is an H.323 endpoint and the second protocol is H.323.

4. The method of claim 1, wherein the first and second message exchanges in the first protocol are a request to open unidirectional media connections and the first message exchange in the second protocol opens a bidirectional media connection.

5. The method of claim 1, wherein the first and second message exchanges in the first protocol and the first message exchange in the second protocol close a media connection.

6. The method of claim 1, wherein facilitating one or more media flows over the media path between the first and second endpoints comprises facilitating the exchange of audio and video between the first and second endpoints.

7. A computer-readable medium encoding software for consolidating media signaling to facilitate Internet Protocol (IP) telephony, the software, when executed, operable to:

receive a first message exchange in a first protocol from a first endpoint to open a first unidirectional media connection by negotiating a media path with a second endpoint;

determine to consolidate the first message exchange with additional message exchanges received from the first endpoint in the first protocol, wherein determining to consolidate the first message exchange with the additional message exchanges comprises;

activating a timer to begin consolidation, wherein the timer expires according to a time period; and

determining whether the timer expires;

reactivating the timer to consolidate additional message exchanges received from the first endpoint if the timer expires and if additional message exchanges can be consolidated;

receive a second message exchange in the first protocol from the first endpoint to open a second unidirectional media connection;

consolidate information derived from the first message exchange and the second message exchange within the time period;

initiate a first message exchange in a second protocol to the second endpoint according to the information consolidated from the first and second message exchanges in the first protocol, wherein the first message exchange in the second protocol opens a bidirectional media connection;

facilitate one or more unidirectional media flows over the media path between the first and second endpoints according to a message exchange in the first protocol if the first and second message exchanges in the first protocol are not consolidated within the time period; and

facilitate one or more bidirectional media flows over the media path between the first and second endpoints according to the first and second message exchanges in the first protocol and the first message exchange in the second protocol if the first and second message exchanges in the first protocol are consolidated.

8. The computer readable medium of claim 7, wherein the first endpoint is an H.323 endpoint and the first protocol is H.323, and the second endpoint is a Session Initiation Protocol (SIP) endpoint and the second protocol is SIP.

9. The computer readable medium of claim 7, wherein the first endpoint is a SIP endpoint and the first protocol is SIP, and the second endpoint is an H.323 endpoint and the second protocol is H.323.

10. The computer readable medium of claim 7, wherein the first and second message exchanges in the first protocol are a request to open unidirectional media connections and the first message exchange in the second protocol opens a bidirectional media connection.

11. The computer readable medium of claim 7, wherein the first and second message exchanges in the first protocol and the first message exchange in the second protocol close a media connection.

12. The computer readable medium of claim 7, wherein facilitating the one or more media flows over the media path between the first and second endpoints comprises facilitating the exchange of audio and video between the first and second endpoints.

13. A system for consolidating media signaling to facilitate Internet Protocol (IP) telephony, comprising:

a first endpoint and a second endpoint operable to exchange media, wherein the first endpoint communicates using a first protocol and the second endpoint communicates using a second protocol; and

a call manager operable to;

receive a first message exchange in a first protocol from a first endpoint to open a first unidirectional media connection by negotiating a media path with a second endpoint;

determine to consolidate the first message exchange with additional message exchanges received from the first endpoint in the first protocol, wherein determining to consolidate the first message exchange with the additional message exchanges comprises;

activating a timer to begin consolidation, wherein the timer expires according to a time period; and

determining whether the timer expires;

reactivating the timer to consolidate additional message exchanges received from the first endpoint if the timer expires and if additional message exchanges can be consolidated;

receive a second message exchange in the first protocol from the first endpoint to open a second unidirectional media connection;

consolidate information derived from the first message exchange and the second message exchange within the time period;

initiate a first message exchange in a second protocol to the second endpoint according to the information consolidated from the first and second message exchanges in the first protocol, wherein the first message exchange in the second protocol opens a bidirectional media connection;

facilitate one or more unidirectional media flows over the media path between the first and second endpoints according to a message exchange in the first protocol if the first and second message exchanges in the first protocol are not consolidated within the time period; and

facilitate one or more bidirectional media flows over the media path between the first and second endpoints according to the first and second message exchanges in the first protocol and the first message exchange in the second protocol if the first and second message exchanges in the first protocol are consolidated.

14. The system of claim 13, wherein the first endpoint is an H.323 endpoint and the first protocol is H.323, and the second endpoint is a Session Initiation Protocol (SIP) endpoint and the second protocol is SIP.

15. The system of claim 13, wherein the first endpoint is a SIP endpoint and the first protocol is SIP, and the second endpoint is an H.323 endpoint and the second protocol is H.323.

16. The system of claim 13, wherein the first and second message exchanges in the first protocol are a request to open unidirectional media connections and the first message exchange in the second protocol opens a bidirectional media connection.

17. The system of claim 13, wherein the first and second message exchanges in the first protocol and the first message exchange in the second protocol close a media connection.

18. The system of claim 13, wherein facilitating the one or more media flows over the media path between the first and second endpoints comprises facilitating the exchange of audio and video between the first and second endpoints.

19. A system for consolidating media signaling to facilitate Internet Protocol (IP) telephony, comprising:

means for receiving a first message exchange in a first protocol from a first endpoint to open a first unidirectional media connection by negotiating a media path with a second endpoint;

means for determining to consolidate the first message exchange with additional message exchanges received from the first endpoint in the first protocol, wherein means for determining to consolidate the first message exchange with the additional message exchanges comprises;

activating a timer to begin consolidation, wherein the timer expires according to a time period; and

determining whether the timer expires;

reactivating the timer to consolidate additional message exchanges received from the first endpoint if the timer expires and if additional message exchanges can be consolidated;

means for receiving a second message exchange in the first protocol from the first endpoint to open a second unidirectional media connection;

means for consolidating information derived from the first message exchange and the second message exchange within the time period;

means for initiating a first message exchange in a second protocol to the second endpoint according to the information consolidated from the first and second message exchanges in the first protocol, wherein the first message exchange in the second protocol opens a bidirectional media connection;

means for facilitating one or more unidirectional media flows over the media path between the first and second endpoints according to a message exchange in the first protocol if the first and second message exchanges in the first protocol are not consolidated within the time period; and

means for facilitating one or more bidirectional media flows over the media path between the first and second endpoints according to the first and second message exchanges in the first protocol and the first message exchange in the second protocol if the first and second message exchanges in the first protocol are consolidated.