System and method for monitoring and optimizing network performance with user datagram protocol network performance information packets

• US 8,125,897 B2
• Filed: 05/31/2007
• Issued: 02/28/2012
• Est. Priority Date: 08/22/2006
• Status: Active Grant

• Current Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: Embarq Holdings Company LLC (Lumen Technologies, Inc.)
• Inventors: Ray, Amar N., Chakravarthy, Cadathur V.
• Primary Examiner(s): Moe, Aung S
• Assistant Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US11/809,407
• Publication Number:
  US 20080049638A1
• Time in Patent Office: 1,734 Days
• Field of Search: 370/229, 370/230.1, 370231-238, 370241-242, 370/244, 370/248, 370/252, 370/253, 709/224
• US Class Current: 370/229
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 41/5003 Managing SLA; Interaction between SLA and QoS
• CPC Class Codes: H04L 41/5025 by proactively reacting to service quality change, e.g. by reconfiguration after service quality degradation or upgrade
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/087 Jitter
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/125 by balancing the load, e.g. traffic engineering
• CPC Class Codes: H04L 47/22 Traffic shaping
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames

Abstract

A method for monitoring and optimizing performance of a packet network utilizing user datagram protocol including determining network performance information between a sending user datagram protocol network element and a receiving user datagram protocol network element; concatenating the network performance information into data packets; transmitting the data packets to at least one non-user datagram protocol network device having transport layer capabilities; and controlling bandwidth of the at least one non-user datagram protocol network device to optimize the network utilizing the user datagram protocol based on the network performance information in the data packets. A system for monitoring and optimizing performance of a packet network utilizing user datagram protocol is also included.

Claims

1. A method for optimizing communications of a packet network, the method comprising:

determining network performance information at a data link layer of a first network device, the network performance information being associated with user datagram protocol communications between the first network device and a second network device along a communications path, the network performance information enabled to describe a network problem including quality of service problems and, traffic problems for both real-time content and non-real-time content of the user datagram protocol communications;

generating a packet, the packet including the network performance information;

identifying a third network device as a nearest network device with transport layer capabilities for the user datagram protocol and as having available buffer space;

communicating the packet to the third network device in response to identifying the third network device as the nearest network device with the transport layer capabilities for the user datagram protocol and as having the available buffer space;

injecting the network performance information from the data link layer into a transport layer in response to detecting a network problem utilizing the network performance information in the packet; and

controlling bandwidth of data communicated by the third network device utilizing the user datagram protocol in response to the network performance information in the communicated packet.

2. The method of claim 1, wherein injecting the network performance information from the data link layer is accomplished by the third network device.

3. The method of claim 1, wherein controlling the bandwidth of the third network device comprises restricting the bandwidth communicated by the third network device utilizing the user datagram protocol, and wherein the user datagram protocol communications do not include test traffic.

4. The method of claim 3, wherein controlling the bandwidth further comprises resuming a prior level of bandwidth communicated by the third network device utilizing the user datagram protocol in response to a receipt by the third network device of a second packet.

5. The method of claim 1, wherein controlling the bandwidth of the third network device comprises buffering data scheduled to be communicated by the third network device utilizing the user datagram protocol.

6. The method of claim 1, wherein the third network device sets a maximum bandwidth for applications and protocols utilizing the bandwidth to communicate utilizing the user datagram protocol.

7. The method of claim 1, wherein communicating the packet to a third network device comprises communicating the packet in-band utilizing the user datagram protocol along the communications path.

8. The method of claim 1, wherein the network performance information includes an available bandwidth, a packet count, and a bandwidth.

9. The method of claim 1, further comprising:

refreshing a status at a designated interval to indicate whether the network problem is present.

10. The method of claim 9, further comprising:

setting the status to no fault in response to the data link layer determining the network problem no longer exists.

11. The method of claim 1, wherein the third network device is located along the communications path between the first network device and the second network device.

12. The method of claim 1, further comprising:

determining the transport layer capabilities of a plurality of devices near a node experiencing the quality of service problems and traffic problems, wherein the third network device is located along the communications path between the first network device and the second network device.

13. A system for optimizing communications of a packet network, the system comprising:

a first network device operable to determine network performance information for communications utilizing user datagram protocol at a data link layer of the first network device, the first network device being further operable to generate a packet, the packet including the network performance information, the network performance information enabled to describe a network problem including quality of service problems and traffic problems for both real-time content and non-real-time content of the user datagram protocol communications;

a second network device in communication with the first network device along a communications path utilizing the user datagram protocol, the network performance information being associated with communications utilizing the user datagram protocol between the first network device and the second network device; and

a third network device having transport layer capabilities, the third network device being identified as having transport layer capabilities for the user datagram protocol and available buffer space, the third network device is located along the communications path between the first network device and the second network device and operable to control bandwidth of data communicated by the third network device using the user datagram protocol in response to receiving the packet from the first network device including the network performance information;

wherein the network performance information is operable to be injected from the data link layer into a transport layer in response to detecting a network problem utilizing the network performance information in the packet.

14. The system of claim 13, wherein the third network device is operable to inject the network performance information from the data link layer into the transport layer.

15. The system of claim 13, wherein the third network device is operable to control the bandwidth of data communicated by the third network device utilizing the user datagram protocol by restricting the bandwidth communicated by the third network device.

16. The system of claim 15, wherein the third network device is further operable to control the bandwidth of the third network device by resuming a prior level of bandwidth communicated by the third network device utilizing the user datagram protocol in response to a receipt by the third network device of a second packet.

17. The system of claim 13, wherein the third network device is operable to control the bandwidth of data communicated by the third network device utilizing the user datagram protocol by buffering data scheduled to be communicated by the third network device.

18. The system of claim 13, wherein the third network device sets a maximum bandwidth for applications and protocols utilizing the bandwidth to communicate utilizing the user datagram protocol.

19. The system of claim 13, wherein the packet is communicated between the first network device and the third network device in-band along the communications path utilizing the user datagram protocol.

20. The system of claim 13, wherein the network performance information includes an available bandwidth, a packet count, and a bandwidth.

21. The system of claim 13, wherein network devices of the data link layer repeatedly determine at designated intervals a status indicating whether the network problem is still present.

22. The system of claim 13, wherein the third network device sets the status to no fault in response to the data link layer determining the network problem no longer exists.

23. The system of claim 13, wherein the transport layer capabilities of a plurality of devices near a node experiencing the quality of service problems and the traffic problems are identified.

24. The system of claim 23, wherein the third network device is selected in response to the third network device being a nearest network device having the transport layer capabilities and the available buffer space.