In CSMA/CA communication qualities management system and method

摘要

PROBLEM TO BE SOLVED: To improve radio communication use efficiency by determining the quality of a plurality of radio stations connected to a network to perform radio communication based on a CSMA/CA method.SOLUTION: A CSMA/CA communication quality management system includes: management radio stations 1-1 to 1-N which collect identification information of each detectable radio station in the surroundings among radio stations to output to an information collection unit 4. The information collection unit, based on the identification information collected from the management radio stations, sets up graph information which indicates the detection relationship of the mutual radio stations, to output to a link evaluation unit 3. The link evaluation unit includes means for defining, from the graph information, a radio station which satisfies a condition that an adjacent radio station exists and all of the adjacent mutual radio stations can mutually detect or no adjacent radio station exists, or a condition 2, to be a highly reliable link, whereas a radio station not satisfying a condition 1 to be a low reliable link, to determine one or both of the highly reliable link and the low reliable link. The use of the CSMA/CA method is determined based on the information on the highly reliable link or on the low reliable link.SELECTED DRAWING: Figure 1