Patent ID: 7263062
Filing Date: 2007-08-28
Classification: H04L

Abstract:
1. A transmission apparatus having a function to switch a line with a redundant configuration comprising a working line and a protection line from said working line to said protection line in the event of a transmission line failure on said working line, said transmission apparatus comprising: a cross-connect-classifying means for inputting cross-connect information from an external source and classifying said information into cross-connect categories wherein said cross-connect information includes a signal direction and information requesting a station employing said transmission apparatus to carry out one of the following pieces of processing: a communication means for gathering the cross-connect category of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying said signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel; a connection-implementation-classifying means for classifying an implementation of a connection between terminals into a corresponding connection category from connection categories corresponding to a variety of implementations of connection in accordance with said gathered cross-connect categories of other transmission apparatuses and the cross-connect category of said transmission apparatus employed in said station to create a table for executing control to switch a line in the event of a failure for each channel; a failure-reporting means for transmitting information on a failure including node information of said station in the event of said failure on a transmission line between said station and an adjacent station; a failure-occurrence-location-identifying means for identifying a location of occurrence of a failure from received information on said failure; and a switching control means for executing control to switch said line based on the location of occurrence of the failure identified by said failure-occurrence-location-identifying means and said table according to said implementation of the connection; and said implementation of connection between terminals is path-sequence of working lines or protection lines of a signal which is added until the signal is dropped; and said implementation of connection between terminals is prescribed by cross-connects which are through, drop-and-continue and service selector.