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1. WO2007141671 - A METHOD AND SYSTEM FOR OPTIMIZING RESOURCES FOR ESTABLISHING PSEUDO-WIRES IN A MULTIPROTOCOL LABEL SWITCHING NETWORK

Considered void:  01.09.2008
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED IS:

1. A method for establishing a pseudo-wire connection between first and second switches in a packet switched network, the method comprising;
sending a label mapping message to the second switch requesting that the pseudo-wire connection be established with the first switch;
reserving resources for the pseudo-wire connection at the first switch;
receiving a label withdraw message from the second switch if the second switch has insufficient resources for the pseudo-wire connection and, in response to the label withdraw message, releasing the resources for the pseudo-wire connection at the first switch; and,
activating the pseudo-wire connection if the second switch has sufficient resources for the pseudo-wire connection, thereby optimizing resources for establishing pseudo-wire connections of each of the first and second switches.

2. The method of claim 1 wherein the network is a multiprotocol label switching
("MPLS") network.

3. The method of claim 2 wherein the first and second switches are first and second MPLS switches, respectively.

4. The method of claim 3 wherein the pseudo-wire connection is a bi-directional pseudo-wire connection.

5. The method of claim 4 wherein the bi-directional pseudo-wire connection is one or more bi-directional pseudo-wire connections.

6. The method of claim 1 and further comprising configuring the pseudo-wire connection on each of the first and second switches.

7. The method of claim 3 wherein the resources are one or more of memory, processor capacity, network interface capacity, connection admission control resources, allocated pseudo-wire labels, pseudo-wire label binding context, and pseudo-wire connection state maintenance.

8. A system for establishing a pseudo-wire connection between first and second switches in a packet switched network, the system comprising:
a processor coupled to memory and to an interface to the network; and,
modules within the memory and executed by the processor, the modules including:
a module for sending a label mapping message to the second switch requesting that the pseudo-wire connection be established with the first switch;
a module for reserving resources for the pseudo-wire connection at the first switch;
a module for receiving a label withdraw message from the second switch if the second switch has insufficient resources for the pseudo-wire connection and, in response to the label withdraw message, releasing the resources for the pseudo-wire connection at the first switch; and,
a module for activating the pseudo-wire connection if the second switch has sufficient resources for the pseudo-wire connection, thereby optimizing resources for
establishing pseudo-wire connections of each of the first and second switches.

9. The system of claim 8 wherein the network is a multiprotocol label switching
("MPLS") network.

10. The system of claim 9 wherein the first and second switches are first and second MPLS switches, respectively.

11. The system of claim 10 wherein the pseudo-wire connection is a bi-directional pseudo-wire connection.

12. The system of claim 11 wherein the bi-directional pseudo-wire connection is one or more bi-directional pseudo-wire connections.

13. The system of claim 8 and further comprising a module for configuring the pseudo-wire connection on each of the first and second switches.

14. The system of claim 10 wherein the resources are one or more of memory, processor capacity, network interface capacity, connection admission control resources, allocated pseudo-wire labels, pseudo-wire label binding context, and pseudo-wire connection state maintenance.

15. The system of claim 8 wherein the system is a network management system.

16. The system of claim 8 wherein the system is included in one or more of the first and second switches.