Pre-provisioning a light path setup

Details Pre-provisioning a light path setup Pre-provisioning a light path setup

2006-09-19

2006-09-19

Pham, Chi (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative station

C370S228000, C398S003000, C398S005000

Reexamination Certificate

active

07110356

ABSTRACT:
A system and method of reserving node resources along a desired path through a communications network that can be used to reserve resources across a fault such as an unconnected node interface or a disconnected link. The resource reservation technique is performed on a communications system including a plurality of nodes interconnected by at least one path to form a ring communications network. A communications link is identified within the path such that at least one node is disposed on a first side of the link and at least one node is disposed on a second side of the link. The identified link may have a fault. Resources are then reserved on the nodes disposed on the first side of the link by accessing the nodes over the path in a first direction around the ring network. Next, resources are reserved on the nodes disposed on the second side of the link by accessing the nodes from the first side over the path in a second direction around the ring network, in which the second direction is opposite the first direction. The path is then established without reallocating the node reservations.

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