RPR SPAN BW PROTECTION SCHEME FOR RRR TRANSPORTED OVER SONET PATHS

摘要

PROBLEM TO BE SOLVED: To provide fractional protection of Resilient Packet Ring (RPR) span bandwidth (BW) by provisioning a plurality of SONET paths in a given span, being greater than the RPR ring BW.;SOLUTION: A communication system comprises a plurality of Synchronous Optical Network (SONET) paths, an RPR (Resilient Packet Ring) span implemented using the plurality of Synchronous Optical Network paths, and an LCAS (Link Capacity Adjustment Scheme) operable, in response to failure of a Synchronous Optical Network path implementing the RPR span, to remove the failed Synchronous Optical Network path from implementing the RPR span and to redistribute the RPR traffic over the remaining Synchronous Optical Network paths.;COPYRIGHT: (C)2007,JPO&INPIT