Scaleable RSVP signaling between VoIP dial-peers for tandem voice solutions

• US 6,931,028 B1
• Filed: 12/28/2000
• Issued: 08/16/2005
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Hock, Thomas
• Primary Examiner(s): Pezzlo, John
• Assistant Examiner(s): Elallam, Ahmed
• Application Number:
  US09/751,523
• Time in Patent Office: 1,692 Days
• Field of Search: 370229-232, 370/235, 370/236, 370/252, 370/254, 370/352, 370/356, 370/389, 370/401, 370/412, 370/465, 370/477, 379/900
• US Class Current: 370/477
• CPC Class Codes: H04L 45/12 Shortest path evaluation
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: Y10S 379/90 Internet, e.g. Internet phone, webphone, internet-based telephony

Abstract

A method for high quality voice communication over an IP network. The method is implemented using an IP network device. Voice communication quality of service is initiated through the transmission of a path message for the voice communication. The path message is configured for establishing a communications path through the nodes of the IP network. A reservation message is received in response to the path message. The reservation message is configured for specifying a range of voice streams for a bandwidth reservation, allowing a single reservation message to specify bandwidth for quality of service for multiple voice calls. The bandwidth reservation for the range of voice streams is implemented in accordance with the reservation message. The path message can be transmitted from an originating IP network device, such as an originating VoIP gateway, and can be generated by a first voice application executing thereon. The reservation message can be received from a terminating IP network device, such as a terminating VoIP gateway, and can be generated by a second voice application executing thereon. The reservation message includes a source port range specifying the range of voice streams for transmission. A bandwidth reservation table within the IP network device is updated in accordance with the reservation message, and bandwidth for transmission of the range of voice streams is reserved using the reservation table.

Claims

1. A method for high quality voice communication over an IP network, the method implemented using an IP network device, comprising the steps of:

a) transmitting a path message for a voice communication, the path message configured for establishing a communications path through an IP network;

b) receiving a reservation message in response to the path message, the reservation message including a source port range specifying a range of voice streams for a bandwidth reservation; and

c) implementing the bandwidth reservation for the range of voice streams in accordance with the reservation message.

2. The method of claim 1 wherein the path message is transmitted from an originating IP network device.

3. The method of claim 1 wherein the reservation message is transmitted from a terminating IP network device.

4. The method of claim 1 further including the step of generating the path message using a voice application executing on an originating IP network device.

5. The method of claim 1 further including the step of receiving the reservation massage from a terminating IP network device, the reservation message generated by the terminating IP network device.

6. The method of claim 1 further including the steps of:

updating a bandwidth reservation table in accordance with the reservation message; and

reserving bandwidth for transmission of the range of voice streams using the reservation table.

7. The method of claim 6 wherein the reservation table is a filter specification table in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

8. The method of claim 6 wherein the reservation message is a filter specification object in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

9. An IP network apparatus for implementing high quality voice communication over an IP network, comprising:

a) means for transmitting a path message for a voice communication, the path message configured for establishing a communications path through an IP network;

b) means for receiving a reservation message in response to the path message, the reservation message including a source port range specifying a range of voice streams for a bandwidth reservation; and

c) means for implementing the bandwidth reservation for the range of voice streams in accordance with the reservation message.

10. The apparatus of claim 9 wherein the path message is transmitted from an originating IP network device.

11. The apparatus of claim 9 wherein the reservation message is transmitted from a terminating IP network device.

12. The apparatus of claim 9 further including a means for generating the path message using an application executing on an originating IP network device.

13. The apparatus of claim 9 further including a means for receiving the reservation massage from a terminating IP network device, the reservation message generated by the terminating IP network device.

14. The apparatus of claim 9 further including means for updating a bandwidth reservation table in accordance with the reservation message, and means for reserving bandwidth for transmission of the range of voice streams using the reservation table.

15. The apparatus of claim 14 wherein the reservation table is a filter specification table in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

16. The apparatus of claim 15 wherein the reservation message is a filter specification object in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

17. A computer readable medium having stored thereon computer readable instructions, which when executed by a computer system of an IP network device cause the computer system to implement a method for high quality voice communication over an IP network, the method comprising the steps of:

a) transmitting a path message for a voice communication, the path message configured for establishing a communications path through an IP network;

b) receiving a reservation message in response to the path message, the reservation message including a source port range specifying a range of voice streams for a bandwidth reservation; and

c) implementing the bandwidth reservation for the range of voice streams in accordance with the reservation message.

18. The method of claim 17 wherein the path message is transmitted from an originating IP network device.

19. The method of claim 17 wherein the reservation message is transmitted from a terminating IP network device.

20. The method of claim 17 further including the step of generating the path message using a voice application executing on an originating IP network device.

21. The method of claim 17 further including the step of receiving the reservation massage from a terminating IP network device, the reservation message generated by the terminating IP network device.

22. The method of claim 17 further including the steps of:

updating a bandwidth reservation table in accordance with the reservation message; and

reserving bandwidth for transmission of the range of voice streams using the reservation table.

23. The method of claim 22 wherein the reservation table is a filter specification table in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

24. The method of claim 22 wherein the reservation message is a filter specification object in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

25. An IP network device for providing high quality voice communication over an IP network, the device including a computer system for executing computer readable instructions, which when executed by the computer system cause the IP network device to implement the steps of:

a) transmitting a path message for a voice communication, the path message configured for establishing a communications path through an IP network;

b) receiving a reservation message in response to the path message, the reservation message including a source port range specifying a range of voice streams for a bandwidth reservation; and

c) implementing the bandwidth reservation for the range of voice streams in accordance with the reservation message.

26. The IP network device of claim 25 wherein the IP network device is an originating IP network device and the path message is transmitted therefrom.

27. The IP network device of claim 25 wherein the IP network device is a terminating IP network device and is configured to transmit the reservation message in response to a received path message.

28. The IP network device of claim 25 wherein a voice application executing on the computer system generates the path message.

29. The IP network device of claim 25 wherein the reservation massage is received from a terminating IP network device, the reservation message generated by the terminating IP network device.

30. The IP network device of claim 25 wherein the bandwidth reservation table is updated in accordance with the reservation message, and wherein bandwidth for transmission of the range of voice streams is reserved using the reservation table.

31. The IP network device of claim 30 wherein the reservation table is a filter specification table in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.

32. The IP network device of claim 30 wherein the reservation message is a filter specification object in accordance with an extension of the RSVP (Resource Reservation Protocol) version 1 specification.