Patent ID: 6744769
Filing Date: 2004-06-01
Classification: H04L

Abstract:
A method for provisioning a communications path between an origin node (O) and a destination node (D) in a bi-directional line switched ring (BLSR) network, said O and D nodes residing in a plurality of OD ring pairs, said method comprising the steps of:a) selecting an OD ring pair from said plurality of OD ring pairs; b) selecting a ring sequence from a plurality of valid ring sequences corresponding to said selected OD ring pair; c) calculating a current path associated with said selected ring sequence; d) comparing, based on an optimization factor, said current path with a current best path available from a database and continuously updating said database with the best current path; e) repeating steps (c) and (d) for each inter-ring connection configuration until a first communications path is obtained: f) repeating steps (b) to (e) for each said ring sequence of said plurality of ring sequences until a second communications path is obtained; and g) repeating steps (a) to (f for each said OD ring pair until an optimal path is found.