MASTER STATION IN COMMUNICATIONS SYSTEM AND ACCESS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a master station and access control method in which interference between communications systems is easily avoided and QoS of communication bands for each communication system can be guaranteed without performing transmission power control in a plurality of communications systems sharing the same channel. SOLUTION: A communication band is divided into: a beacon period in which every master station transmits a beacon packet in competition with one another; a guaranteed-band period (e.g., a TDMA region or an FDMA region) in which only a specific permitted station is allowed access; and a CSMA region in which every station is allowed access in competition with one another and classifies into three regions. Each master station exchanges information of a communication band used in the guaranteed-band region, and based on the respective information, a communication band available to the master station's own communications system in the guaranteed-band period is calculated. COPYRIGHT: (C)2005,JPO&NCIPI