| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable cut-back from a communication path of a reserve system to a communication path of an active system, in fault recovery, in a communication network. <P>SOLUTION: The present invention relates to a communication device, located in a starting point of a second communication path in a communication network including a first communication path to which communication devices are cascaded and which has a starting point and a terminal point, and a second communication path to which communication devices are cascaded and in which the communication devices in both ends are the communication devices on the first communication path, between the communication devices in both the ends, the communication device on the side of the starting point of the first communication path is defined as the starting point and the communication device on the side of the terminal point is defined as a terminal point. The communication device comprises: a checking unit checking whether a band from the starting point of the first communication path down to the terminal point thereof and a band from the starting point of the second communication path down to the terminal point thereof as a standby of a partial zone of the first communication path, are established or not; a route information management unit generating, when the checking unit confirms that the two bands are established, route maintaining information for maintaining the band of the partial zone of the first communication path; and a transmission unit transmitting the route maintaining information to the neighboring communication device on the side of the terminal point of the first communication path. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
