Method of providing restoration routes in a mesh network

Details Method of providing restoration routes in a mesh network Method of providing restoration routes in a mesh network

2005-02-15

2005-02-15

Ho, Duc (Department: 2665)

Multiplex communications

Fault recovery

C370S216000, C370S400000, C370S406000, C370S468000, C714S004110, C340S002100

Reexamination Certificate

active

06856592

ABSTRACT:
A method of providing restoration routes for protecting traffic in a mesh network is described. The method comprises the steps of generating a set of eligible restoration routes for each span in the network, establishing a bi-criteria objective function in terms of route length and capacity cost for selecting a set of restoration routes, and selecting a set of restoration routes for each span from the eligible restoration routes in dependence upon the bi-criteria objective function. Embodiments of the invention may be useful for shortening the lengths, in terms of hops, of existing restoration routes in a mesh-restorable network and in some cases with negligible spare capacity penalty.

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Doucette et al., “Modularity and Economy-of Scale Effects in the Optimal Design of Mesh-Restorable Networks”, p. 226-231. 1999 IEEE. Proceedings of the 1999 IEEE Canadian Conference on Electrical and Computer Engineering.*
Herzberg, Meir t al., ‘An Optimal Spare-Capacity Assignment Model for Survivable Networks with Hop Limits’, Globecom '94, pp. 1-6.
Doucette, John et al., ‘Influence of Modularity and Economy-of-scale Effects on Design of Mesh-Restorable DWDM Networks’, pp. 1-40.

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