Patent ID: 7412250

Claim:
A wireless communication system comprising a plurality of wireless terminal devices and a wireless communication management device for managing communication between the wireless terminal devices, wherein: said wireless communication management device comprises beacon transmission means for transmitting main beacons at a fixed interval to perform synchronization in said wireless communication system and for transmitting sub beacons between said main beacons, wherein said main beacon and said sub beacon include beacon time period information indicating a period of time until said main beacon is transmitted next, and at least one of idle information to allow an unspecified wireless terminal device of said wireless terminal devices to perform transmission, polling information to make a specified wireless terminal device of said wireless terminal devices perform transmission, transmission notification information to make an advance notice of transmission of data after transmission of said beacon to a specified wireless terminal device of said wireless terminal devices, and transmission acknowledgement information indicating for a specified wireless terminal device of said wireless terminal devices whether reception of data transmitted from the wireless terminal device was successful or unsuccessful; and said wireless terminal device comprises: data division means for comparing said beacon time period information included in said main beacon or said sub beacon received, with a required transmission time of transmission data, and then dividing the transmission data so that transmission of the transmission data divided is finished before next transmission of said main beacon is started when the required transmission time is the beacon time period information or longer; and data transmission means for transmitting said transmission data.