WIRELESS NETWORK, ITS PATH CONTROL METHOD AND WIRELESS COMMUNICATION CONTROLLER

摘要

PROBLEM TO BE SOLVED: To enhance the performance and the reliability of a wireless network by stably transferring data in the wireless network whose channel quality changes every moment. SOLUTION: In the wireless network adopting a logical configuration where transfer paths are in existence among a plurality of wireless communication controllers in the case of transferring data from an optical sender to an optical destination, a control section 200 of a wireless communication controller being the sender transmits a path investigation frame to paths leading to the destination prior to start of transmission and discriminates paths such as those received earlier by the destination, paths with less retrial number of times or paths with a small channel load to decide the path to be used for the transmission. The wireless communication controllers acting like relay stations in each path obtain number of retrial times/channel load of its own and apply update processing to the path investigation frame and store the result. Moreover, the wireless communication controller acting like the destination acquires path information (retrial times/channel load) on the way by data frames during communication, detects a fault when a value of the path information received by the destination exceeds a value stored in a threshold value storage section 211, and informs the sender about the occurrence of the fault in the path in use to allow the sender to select other path.