| 摘要 |
Provided is a communication apparatus wherein communication routes can be updated quickly in the event of a failure. A node (20) comprises a communication route searching means that sets or updates a communication route to the target station spontaneously, in case of communication route errors such as the communication route being cut off. This communication route searching means is composed of a route search control unit (25), a route search requesting unit (26), a route evaluation unit (27), and a route update unit (28). The route search requesting unit (26) transmits, at a prescribed timing, a signal for requesting a search for a communication route. The route search requesting unit (26) also detects a signal responding to the signal for requesting a search for a communication route, or a communication route error, and broadcasts a route request packet via an optical transceiver (21) in accordance with the detection. The route update unit (28) receives a route response packet transmitted from a center node or a node that will be the target station or a station with a valid route to the target station, and changes the original communication route to another communication route on the basis of the route response packet. A route storage unit (24) is connected to the route update unit (28), and stores a communication route table updated by the route update unit. |
