Patent ID: 6895182
Filing Date: 2005-05-17
Classification: H04J

Abstract:
1. An optical transmitting apparatus for a ring transmission system used in a ring transmission system which is combined (a1) a first ring transmission system with (a2) a second ring transmission system, in (a1) the first ring transmission system a plurality of optical transmitting apparatuses are connected to one another over a bidirectional ring transmission path having a data link channel in which crossconnect information representing an add node identifier representing a node adding an optical signal and a drop node identifier representing a node dropping an optical signal is written, and in (a2) the second ring transmission system a plurality of optical transmitting apparatuses are connected to one another over a bidirectional ring transmission path having the data link channel, said optical transmitting apparatus comprising: a data link reading means for reading said crossconnect information and topology information uniquely representing the order of arrangement of optical transmitting apparatuses connected in ring; a topology creating means for creating a topology using said topology information read by said data link reading means; a data link writing means for writing a unique absolute node identifier given to each of said plural optical transmitting apparatuses and a relative node identifier given by relating absolute node identifiers of other nodes with said topology in said crossconnect information of said data link channel on the basis of said topology created by said topology creating means; a squelch table creating means for creating a squelch table holding said crossconnect information written in said data link, channel; and an RIP table creating means for creating an RIP table holding a primary node identifier indicating a primary node which transmits said optical signal from said first ring transmission path to said second ring transmission path, a secondary node identifier indicating a secondary node adjacent to said primary node to transmit/receive said optical signal, and said drop node identifier for each of a working line and a protection line on the basis of said crossconnect information.