Patent ID: 7974187
Filing Date: 2011-07-05
Classification: H04L,Y02D

Abstract:
1. A data transmission system having a plurality of transmitters connected in a ring configuration, wherein each of said plurality of transmitter comprises: a band monitoring unit for monitoring bandwidths of a first and a second transmission path between one of said plurality of transmitters and a first and a second transmitter on both sides of said one transmitter, respectively; and a protection execution unit for executing a protection processing by setting up a bypass path for each of said first and second transmission paths, wherein said protection execution unit confirms whether or not protection processing is being executed by said one transmitter and said first and second transmitters when the bandwidth of said first or second transmission paths acquired by said band monitoring unit decreases below a threshold, and executes protection processing for said first or second transmission path which is determined to have a bandwidth smaller than the threshold only when said one transmitter and said first and said second transmitters are not executing protection processing.