SENSOR TERMINAL, ABNORMALITY DECISION INFORMATION TRANSMISSION METHOD FOR SENSOR TERMINAL, ABNORMALITY DECISION METHOD FOR CONTROLLER AND SENSOR FOR CONTROLLER

摘要

PROBLEM TO BE SOLVED: To accurately decide abnormality in a wireless sensor terminal.;SOLUTION: Sensor terminals 120a, 120b periodically update an adjacency table, having information on communication possibility with other nodes and estimated distance (502, 512). A controller 101 periodically receives the sensor information acquisition request response, including the adjacency table from the sensor terminals 120a, 120b (521, 531) and updates the integrated table having the information on the communication possibility with the other nodes and the estimated distance for each of the nodes (540). The controller 101 updates the past information table, having the past information created based on the information which the integrated table updated in the past has in accordance with the update of the integrated table (541). Based on the comparison result of the integrated table and the past information table, the controller 101 decides the abnormalities (destructed/disrupted, or moved) of the sensor terminals 120a, 120b by using the communication availability with the controller 101 and other sensor terminals, and the information on the estimated distance (542).;COPYRIGHT: (C)2011,JPO&INPIT