Routing method based on the routing protocol based on the link availability ratio, and program node device

摘要

PROBLEM TO BE SOLVED: To provide a route control method and the like with which a route of stable communication quality is automatically set by monitoring a route updating message based on a route control protocol through a normal sequence.;SOLUTION: First of all, a node device records in a path recording table a path list constituted of continuous specific identification numbers of relayed node devices for each transmission source address of a route updating message, measures an available time, during which the route updating message is passed, for each link between neighboring node devices, and records in a link recording table the number of available links based on the available time. Next, the node device calculates a link available rate based on the number of available links regarding an evaluation time T and calculates a path available rate by multiplying the link available rate for each path list. Then, the node device sets a value corresponding to a level of the path available rate to a priority parameter for a packet of the transmission source address for a route map setting section which sets a priority route.;COPYRIGHT: (C)2010,JPO&INPIT