Patent ID: 7630297
Filing Date: 2009-12-08
Classification: H04J

Abstract:
1. A method for enhancing a trail/path protection function in at least one of a synchronous digital hierarchy (SDH) network and a synchronous optical networking (SONET) network, the network comprising a number N of working resources and a number M of protection resources and transmitting signal frames having a section overhead (SOH) in SDH technology, or a Line OverHead (LOH) in SONET technology, and a path overhead (POH), said trail/path protection function comprising a linear multiplex section protection (MSP) N:1 trail protection function based on transmission of protection information through K1 and K2 bytes of the SOH in the SDH technology or the LOH in the SONET technology, wherein the method comprises: mapping content of said K1 and K2 bytes by protocol exchange into POH bytes of the path overhead in the SDH or the SONET technology, for at least one of a Low Order path level and a High Order path level to allow handling of the M protection resources shared among the N working resources in an end-to-end handling and an intermediate handling, wherein mapping comprises: providing a first multiframe, mapping the content of the K1 and K2 bytes into a first portion of the POH bytes for each frame of the first multiframe for the end-to-end handling, providing a second multiframe, and mapping the content of the K1 and K2 bytes into a second portion of the POH bytes for each frame of the second multiframe for the intermediate handling.