Method and system for providing a protection path for connection-oriented signals in a telecommunications network

• US 6,775,229 B1
• Filed: 06/06/2000
• Issued: 08/10/2004
• Est. Priority Date: 05/05/2000
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Network Communications Incorporated (Fujitsu Limited)
• Inventors: Widjaja, Indra, Wynn, David W., Mo, Li, Sullivan, Edward T.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Elallam, Ahmed
• Application Number:
  US09/588,634
• Time in Patent Office: 1,526 Days
• Field of Search: 370/216-228, 370/241-246, 370/248-250, 370/252, 370/254, 370/255, 370/351
• US Class Current: 370/220
• CPC Class Codes: H04J 2203/006 Fault tolerance and recovery
• CPC Class Codes: H04L 2012/5627 Fault tolerance and recovery
• CPC Class Codes: H04L 41/0663 Performing the actions predefined by failover planning, e.g. switching to standby network elements
• CPC Class Codes: H04L 41/0668 by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 41/22 comprising specially adapted graphical user interfaces [GUI]
• CPC Class Codes: H04L 43/50 Testing arrangements
• 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
• CPC Class Codes: H04L 45/502 Frame based
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/724 at intermediate nodes, e.g. resource reservation protocol [RSVP]
• CPC Class Codes: H04L 47/728 for backup paths
• CPC Class Codes: H04L 47/746 Reaction triggered by a failure
• CPC Class Codes: H04L 47/781 Centralised allocation of resources
• CPC Class Codes: H04L 47/805 QOS or priority aware
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A system is provided for providing a protection path for connection-oriented signals in a telecommunications network comprising a plurality of nodes. The system includes a source node, a destination node and a penultimate node. The source node is operable to transmit traffic. The destination node is operable to receive traffic from the source node. The penultimate node is operable to receive traffic from the source node, to transmit traffic directly to the destination node, to designate one of the nodes as a reflector and to generate a first segment of a protection path from the penultimate node through the reflector to the destination node.

Claims

1. A system for providing a protection path for connection-oriented signals in a telecommunications network comprising a plurality of nodes, the system comprising:

a source node operable to transmit traffic;

a destination node operable to receive traffic from the source node; and

a penultimate node operable to receive traffic from the source node, to transmit traffic directly to the destination node, to designate one of the nodes as a reflector and to generate a first segment of a protection path from the penultimate node through the reflector to the destination node.

2. The system of claim 1, the reflector operable to receive traffic, to identify the traffic as working traffic or protection traffic, to transmit the working traffic to a node downstream of the reflector and to transmit the protection traffic to the destination node.

3. The system of claim 2, the reflector further operable to transmit the protection traffic directly to the destination node.

4. The system of claim 2, the reflector further operable to designate one of the nodes as a next reflector and to generate a second segment of the protection path from a node upstream of the reflector through the next reflector to a node downstream of the reflector.

5. The system of claim 4, the next reflector operable to receive traffic, to identify the traffic as working traffic or protection traffic, to transmit the working traffic to a node downstream of the next reflector and to transmit the protection traffic to the node downstream of the reflector.

6. The system of claim 5, the reflector further operable to transmit the protection traffic directly to the destination node, and the next reflector further operable to transmit the protection traffic directly to the node downstream of the reflector.

7. The system of claim 4, the source node comprising the next reflector.

8. The system of claim 1, the plurality of nodes comprising a plurality of inner nodes operable to transmit traffic between the source node and the reflector and between the reflector and the destination node, each of the inner nodes operable to receive traffic, to identify the traffic as working traffic or protection traffic, to transmit the working traffic to a node downstream of the inner node, and to transmit the protection traffic to a node upstream of the inner node.

9. The system of claim 1, the source node comprising the reflector.

10. The system of claim 1, the penultimate node further operable to designate one of the nodes as a reflector based on Quality of Service for the traffic.

11. A node in a telecommunications network, comprising:

an ingress port operable to receive working traffic on a working path and protection traffic on a protection path;

a reflector identifier operable to identify the node as a reflector based on the received traffic;

a protection path generator operable to generate a protection path based on an identification of the node as a reflector;

a penultimate node identifier operable to identify the node as a penultimate node based on the received traffic and based on a determination that the node is operable to transmit working traffic directly to a destination node to which the node is coupled, the protection path generator further operable to generate a protection path based on the identification of the node as a penultimate node; and

an egress port operable to transmit traffic.

12. The node of claim 11, further comprising a traffic classifier operable to classify received traffic as working traffic or protection traffic.

13. The node of claim 12, the traffic comprising a traffic identifier, the traffic classifier further operable to classify received traffic as working traffic or protection traffic based on the traffic identifier for the traffic.

14. The node of claim 12, the egress port further operable to transmit working traffic based on the received working path and to transmit protection traffic based on the received protection path.

15. The node of claim 12, the ingress port comprising a plurality of ports and the egress port comprising a plurality of ports.

16. The node of claim 15, the ingress port comprising a working ingress port and a protection ingress port and the egress port comprising a working egress port and a protection egress port, the traffic classifier further operable to identify traffic received through the working ingress port as working traffic and traffic received through the protection ingress port as protection traffic, the working egress port operable to transmit working traffic and the protection egress port operable to transmit protection traffic.

17. The node of claim 11, the node coupled to a plurality of nodes, the reflector identifier operable to identify the node as a reflector based on the received protection path comprising a node downstream of the node subsequent to the node.

18. The node of claim 11, the reflector identifier further operable to identify the node as a reflector based on Quality of Service for the traffic.

19. A method for providing a protection path for connection-oriented signals in a telecommunications network comprising a plurality of nodes, the method comprising:

identifying a source node operable to transmit traffic;

identifying a destination node operable to receive traffic from the source node;

identifying a penultimate node operable to transmit traffic directly to the destination node;

designating one of the nodes as a reflector; and

generating a first segment of a protection path from the penultimate node through the reflector to the destination node.

20. The method of claim 19, further comprising:

identifying the traffic received at the penultimate node as working traffic or protection traffic;

transmitting the working traffic received at the penultimate node directly from the penultimate node to the destination node;

identifying the traffic received at the reflector as working traffic or protection traffic; and

transmitting the protection traffic received at the reflector directly from the reflector to the destination node.

21. The method of claim 19, the source node comprising the reflector.

22. The method of claim 19, further comprising:

designating one of the nodes as a next reflector; and

generating a second segment of the protection path from a node upstream of the reflector through the next reflector to a node downstream of the reflector.

23. The method of claim 22, further comprising:

identifying the traffic received at the penultimate node as working traffic or protection traffic;

transmitting the working traffic received at the penultimate node directly from the penultimate node to the destination node;

identifying the traffic received at the reflector as working traffic or protection traffic;

transmitting the protection traffic received at the reflector directly from the reflector to the destination node;

identifying the traffic received at the next reflector as working traffic or protection traffic; and

transmitting the protection traffic received at the next reflector directly from the next reflector to the node downstream of the reflector.

24. The method of claim 22, the source node comprising the next reflector.

25. The method of claim 22, designating one of the nodes as a reflector comprising designating one of the nodes as a reflector based on Quality of Service for the traffic.