Adaptive packet size modification for voice over packet networks

• US 8,391,166 B2
• Filed: 09/13/2006
• Issued: 03/05/2013
• Est. Priority Date: 09/13/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Chen, Juin-Hwey
• Primary Examiner(s): SINKANTARAKORN, PAWARIS
• Application Number:
  US11/520,085
• Publication Number:
  US 20080062877A1
• Time in Patent Office: 2,365 Days
• Field of Search: 370230-232, 370/235, 370252-253, 370/468, 370470-471, 370/474, 370/476
• US Class Current: 370/252
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04L 47/365 Dynamic adaptation of the packet size
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

A system and method for reducing end-to-end delay associated with telephone calls carried over a voice over packet network in a manner that avoids overloading of the network. The system and method involves monitoring one or more parameters indicative of an amount of bandwidth being utilized on the voice over packet network, responsive to the monitoring, determining that a level of bandwidth utilization on the voice over packet network has changed, responsive to the determination that the level of bandwidth utilization on the voice over packet network has changed, issuing a command to a telephony device, and responsive to receipt of the command by the telephony device, changing the size of packets used for carrying frames of encoded voice signals associated with a telephone call from a first packet size to a second packet size.

Claims

1. A method for minimizing end-to-end delay associated with calls carried over a packet network in a manner that avoids overloading of the packet network, comprising:

performing by one or more of a plurality of network devices within a path of a first active call in the packet network, functions comprising;

receiving one or more call control messages from one of a network management entity or a call control entity, wherein said network management entity or said call control entity monitors and/or controls the packet network, and wherein said one or more call control messages are generated using per call parameters from one or more network devices within a path of at least a second active call in the packet network separate from said path of said first active call; and

responsive to said receiving of said one or more call control messages from said one of said network management entity or said call control entity, changing from a first packet size to a second packet size associated with a plurality of voice packets used for carrying frames of encoded signals associated with said first active call within said one or more of said plurality of network devices.

2. The method of claim 1, comprising generating said one or more call control messages, wherein said generating comprises:

monitoring one or more parameters of each of said one or more network devices within said path of said at least a second active call in the packet network separate from said path of said first active call in the packet network, the one or more parameters being indicative of an amount of overall bandwidth being utilized on the packet network;

responsive to the monitoring, determining whether or not a level of overall bandwidth utilization on the packet network has changed; and

responsive to a determination that the level of overall bandwidth utilization on the packet network has changed, sending said one or more call control messages to said one or more of said plurality of network devices within said path of said first active call within the packet network.

3. The method of claim 2, wherein said monitoring one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network comprises monitoring an amount of traffic being handled by said one or more network devices within said path of said at least a second active call in the packet network.

4. The method of claim 2, wherein said monitoring one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network comprises monitoring a number of active calls being handled by said call control entity.

5. The method of claim 2, wherein said monitoring one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network comprises monitoring the level of bandwidth utilization for said one or more network devices within said path of said at least a second active call in the packet network over a time of day.

6. The method of claim 2, wherein said monitoring one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network comprises monitoring the level of bandwidth utilization for said one or more network devices within said path of said at least a second active call in the packet network over each day of the week.

7. The method of claim 2, wherein said determining whether or not the level of overall bandwidth utilization has changed comprises determining whether or not the level of overall bandwidth utilization has decreased beyond a threshold limit.

8. The method of claim 2, wherein said determining whether or not the level of overall bandwidth utilization has changed comprises determining that the level of overall bandwidth utilization has increased beyond a threshold limit.

9. The method of claim 2, wherein said sending of said one or more call control messages to said one or more of said plurality of network devices comprises:

transmitting a notification to said call control entity, the notification causing said call control entity to send said one or more call control messages to said one or more of said plurality of network devices.

10. The method of claim 1, wherein said changing from said first packet size to said second packet size comprises reducing a packet size used for carrying frames of encoded signals associated with said first active call.

11. The method of claim 10, wherein said reducing the packet size comprises reducing a payload of encoded voice signals carried by each voice packet from one of 10, 20, or 30 milliseconds to 5 milliseconds.

12. The method of claim 1, wherein said changing from said first packet size to said second packet size comprises increasing a packet size used for carrying frames of encoded signals associated with said first active call.

13. The method of claim 12, wherein said increasing the packet size comprises increasing a payload of encoded voice signals carried by each voice packet from 5 ms to one of 10, 20, or 30 milliseconds.

14. The method of claim 1, wherein said sending of said one or more call control messages comprises sending a command to a gateway within the packet network to facilitate changing from said first packet size to said second packet size.

15. The method of claim 1, wherein the packet network comprises a voice over packet network.

16. The method of claim 1, wherein each of the one or more of said plurality of network devices is at a distinct location in the packet network.

17. The method of claim 1, wherein each of the one or more network devices within a path of at least a second active call in the packet network are configured to provide the one or more parameters in response to a request from said network management entity or said call control entity.

18. The method of claim 1, wherein at least one of said one or more of said plurality of network devices within a path of a first active call or said one or more network devices within a path of at least a second active call comprise a telephone device.

19. A system comprising:

one or more of a plurality of network devices within a path of a first active call in a packet network configured to

receive one or more call control messages from one of a network management entity or a call control entity, wherein said network management entity or said call control entity monitors and/or controls the packet network, and wherein said one or more call control messages are generated using per call parameters from one or more network devices within a path of at least a second active call in the packet network separate from said path of said first active call, and

responsive to said receiving of said one or more call control messages from said one of said network management entity or said call control entity, change from a first packet size to a second packet size associated with a plurality of voice packets used for carrying frames of encoded signals associated with said first active call within said one or more of said plurality of network devices.

20. The system of claim 19, wherein said network management entity or said call control entity is configured to perform generating said one or more call control messages, wherein said generating comprises:

monitoring one or more parameters of each of said one or more network devices within said path of said at least a second active call in the packet network separate from said path of said first active call in the packet network, the one or more parameters being indicative of an amount of overall bandwidth being utilized on the packet network;

responsive to the monitoring, determining whether or not a level of overall bandwidth utilization on the packet network has changed; and

responsive to a determination that the level of overall bandwidth utilization on the packet network has changed, sending said one or more call control messages to said one or more of said plurality of network devices within said path of said first active call within the packet network.

21. The system of claim 20, wherein the one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network includes an amount of traffic being handled by said one or more network devices within said path of said at least a second active call in the packet network.

22. The system of claim 20, wherein the one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network includes a number of active calls being handled by said call control entity.

23. The system of claim 20, wherein the one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network includes the level of bandwidth utilization for said one or more network devices within said path of said at least a second active call in the packet network over a time of day.

24. The system of claim 20, wherein the one or more parameters indicative of the amount of overall bandwidth being utilized on the packet network includes the level of bandwidth utilization for said one or more network devices within said path of said at least a second active call in the packet network over each day of the week.

25. The system of claim 20, wherein said determining whether or not the level of overall bandwidth utilization has changed comprises determining whether or not the level of overall bandwidth utilization has decreased beyond a threshold limit.

26. The system of claim 20, wherein said determining whether or not the level of overall bandwidth utilization has changed comprises determining that the overall level of bandwidth utilization has increased beyond a threshold limit.

27. The system of claim 20, wherein said sending of said one or more call control messages comprises sending a command to a gateway within the packet network to facilitate changing from said first packet size to said second packet size.

28. The system of claim 20, wherein said sending of said one or more call control messages to said one or more of said plurality of network devices comprises transmitting a notification to said call control entity, the notification causing the call control entity to send said one or more call control messages to said one or more of said plurality of network devices.

29. The system of claim 19, wherein said changing from said first packet size to said second packet size comprises reducing a packet size used for carrying frames of encoded signals associated with said first active call.

30. The system of claim 29, wherein said reducing the packet size comprises reducing a payload of encoded voice signals carried by each voice packet of the plurality of voice packets from one of 10, 20, or 30 milliseconds to 5 milliseconds.

31. The system of claim 19, wherein said changing from said first packet size to said second packet size comprises increasing a packet size used for carrying frames of encoded signals associated with said first active call.

32. The system of claim 31, wherein said increasing the packet size comprises increasing a payload of encoded voice signals carried by each voice packet of the plurality of voice packets from 5 ms to one of 10, 20, or 30 milliseconds.

33. The system of claim 19, wherein the packet network comprises a voice over packet network.

34. The system of claim 19, wherein each of the one or more of said plurality of network devices is at a distinct location in the packet network.

35. The system of claim 19, wherein each of the one or more network devices within a path of at least a second active call in the packet network are configured to provide the one or more parameters in response to a request from said network management entity or said call control entity.

36. The system of claim 19, wherein at least one of said one or more of said plurality of network devices within a path of a first active call or said one or more network devices within a path of at least a second active call comprise a telephone device.

37. A system comprising:

one or more of a first plurality of network devices serving one active call within a relatively smaller first portion of a packet network, said one or more of said first plurality of network devices configured to receive one or more call control messages from one of a network management entity or a call control entity, wherein said network management entity or said call control entity monitors and/or controls the packet network, and wherein said one or more call control messages are generated using per call parameters from one or more of a second plurality of network devices serving a plurality of active calls within a relatively larger second portion of the packet network, and

responsive to said receiving of said one or more call control messages from said one of said network management entity or said call control entity, configure said one or more of said first plurality of network devices within said relatively smaller portion of said network packet to change from a first packet size to a second packet size associated with a plurality of voice packets used for carrying frames of encoded signals associated with said active call within said one or more of said second plurality of network devices within said relatively larger second portion of the packet network.

38. The system of claim 37, wherein said relatively smaller portion of the packet network comprises one or more gateways.

39. The system of claim 37, wherein the packet network comprises a voice over packet network.

40. The system of claim 37, wherein each of said one or more of said first plurality of network devices within said relatively smaller first portion of the packet network is at a distinct location in the packet network.

41. The system of claim 37, wherein each of said one or more of said first plurality of network devices within said relatively smaller first portion of the packet network are configured to provide the one or more parameters in response to a request from the said network management entity or said call control entity.

42. The system of claim 37, wherein said network management entity or said call control entity is configured to perform generating said one or more call control messages, wherein said generating comprises:

monitoring one or more parameters of said one or more of said second plurality of network devices serving a plurality of active calls within said relatively larger second portion of the packet network, the one or more parameters being indicative of an overall amount of bandwidth being utilized within of the packet network;

responsive to the monitoring, determining whether or not a level of overall bandwidth utilization on the packet network has changed; and

responsive to the determination that the level of overall bandwidth utilization on the packet network has changed, sending said one or more call control messages to said one or more of said first plurality of network devices within said relatively smaller first portion of the packet network.

43. The system of claim 37, wherein at least one of said one or more of said first plurality of network devices or said one or more of said second plurality of network devices comprise a telephone device.

44. One or more circuits within a network device for reducing end-to-end delay over a packet network in a manner that avoids overloading of the packet network, the one or more circuits comprising:

at least one interface configured to communicate voice packets over a path of an active call in the packet network, wherein a number of voice frames are contained in each voice packet; and

at least one processor operably coupled to the at least one interface, the at least one processor operable to;

determine a change in a level of bandwidth utilization of the packet network based upon one or more parameters received from each of a plurality of network devices not in said path of said active call in the packet network,

select a number of voice frames to be placed in each voice packet based upon the determined change in the level of bandwidth utilization,

assemble each voice packet containing the selected number of voice frames, and

transmit each of the assembled voice packets over the packet network via the at least one interface.

45. The one or more circuits of claim 44, wherein the at least one processor is operable to configure the at least one interface to receive the selected number of voice frames to be placed in each voice packet.

46. The one or more circuits of claim 44, wherein the at least one processor is operable to perform one or more functions, comprising:

monitoring the one or more parameters indicative of the determined change in the level of bandwidth being utilized by the packet network; and

selecting the number of voice frames to be placed in each voice packet, based upon the one or more parameters.

47. The one or more circuits of claim 46, wherein the one or more parameters comprise one or more of the following:

an amount of traffic being handled by one or more of said plurality of network devices not in said path of said active call, a number of active voice calls being handled by a call control entity, a change in a level of bandwidth usage by the one or more of said plurality of network devices not in said path of said active call, a time of day, and a day of the week.

48. The one or more circuits of claim 44, wherein each of said plurality of network devices not in said path of said active call is at a distinct location in the packet network.

49. The one or more circuits of claim 44, wherein each of said plurality of network devices not in said path of said active call is configured to provide the one or more parameters in response to a request.

50. The one or more circuits of claim 44, wherein at least one of the network device or the one or more of said plurality of network devices comprises a telephone device.