Hybrid protection using mesh restoration and 1:1 protection

• US 7,242,664 B2
• Filed: 05/30/2002
• Issued: 07/10/2007
• Est. Priority Date: 05/30/2002
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Sha, Yung-Ching, Einstein, David S.
• Primary Examiner(s): HO, DUC CHI
• Application Number:
  US10/158,713
• Publication Number:
  US 20030223359A1
• Time in Patent Office: 1,867 Days
• Field of Search: None
• US Class Current: 370/216
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/22 Alternate routing

Abstract

A method, architecture and service of providing a multiple tiered pricing structure for providing a first service level to priority traffic where the priority traffic is protected via a 1:1 protection system, and a second service level for non-priority or extra traffic, wherein the extra traffic is normally propagated via the protection path, and is protected using a mesh restoration technique in the event of failure of the protection path or use of the protection path by the priority traffic.

Claims

1. A method, comprising:

propagating priority traffic through a first service path in a communications network arranged according to a mesh topology, said first service path having associated with it a corresponding first protection path, said first protection path being used to propagate extra traffic; and

in response to a failure of said first service path, propagating said priority traffic through said first protection path and said extra traffic through an alternate path, wherein said extra traffic is reestablished on said alternate path using a mesh restoration, wherein said mesh restoration uses at least a portion of a second protection path associated with a second service path.

2. The method of claim 1, wherein said priority traffic comprises traffic having a quality of service (QoS) level above a threshold level.

3. The method of claim 2, wherein said threshold level comprises a restoration of priority traffic within approximately 50 milliseconds.

4. The method of claim 1, wherein said mesh topology comprises a plurality of network elements, each of said network elements communicating with at least one other network element via a respective communications path, wherein a portion of said communications paths comprise service paths.

5. The method of claim 1, further comprising:

in response to a failure of said first protection path, propagating said extra traffic through an alternate path.

6. The method of claim 1, wherein each of said service and extra traffic paths have associated with them a respective quality of service level, each of said quality of service levels corresponding to a respective pricing level.

7. A method for use in a network element of a communications network arranged according to a mesh topology, said network element routing priority traffic via one of a first service path and a second service path, said first service path having associated with it a respective first protection path and said second service path having associated with it a respective second protection path, said method comprising:

in response to a failure of said first service path, routing first service path priority traffic to a respective first protection path and routing extra traffic from said respective first protection path to an alternate path, wherein said extra traffic is reestablished on said alternate path using a mesh restoration, wherein said mesh restoration uses at least a portion of said second protection path associated with said second service path.

8. The method of claim 7, wherein said priority traffic comprises traffic having a quality of service (QoS) level above a threshold level.

9. The method of claim 7, wherein said priority traffic is re-established on said first protection path according to a 1:

1 protection scheme.

10. The method of claim 7, wherein each of said service and extra traffic paths have associated with them a respective quality of service level, each of said quality of service levels corresponding to a respective pricing level.

11. A network architecture, comprising:

a plurality of network elements arranged according to a mesh topology, each of said network elements communicating with at least one other network element via a respective communications path, wherein a portion of said communications paths comprise service paths having respective protection paths;

wherein, in the case of a failure of a first service path propagating priority traffic, said priority traffic is routed to a corresponding first protection path and extra traffic previously propagated via the first protection path is routed to an alternate communications path, wherein said extra traffic is reestablished on said alternate communications path using a mesh restoration, wherein said mesh restoration uses at least a portion of a second protection path associated with a second service path.

12. A method comprising:

establishing a first pricing level for propagating priority traffic through a mesh network according to a first 1;

1 protection scheme; and

establishing a second pricing level for propagating extra traffic through a first protection path supporting said first 1;

1 protection scheme;

wherein said extra traffic is restored using a mesh restoration technique in the event of said first protection path being unavailable, wherein said mesh restoration uses at least a portion of a second protection path associated with a second 1;

1 protection scheme.

13. The method of claim 12, wherein said protection path is unavailable due to a failure in a service path supporting said first 1:

1 protection scheme, wherein said priority traffic is switched to said first protection path.

14. The method of claim 12, wherein said first protection path is unavailable due to a failure of a node or link within said first protection path.