WIRELESS COMMUNICATION METHOD AND SYSTEM THEREOF

摘要

A wireless communication method and its system are provided to consume a smaller amount of system resources by continuously transmitting two beacons by performing timing synchronization between a controller and a plurality of nodes. A plurality of nodes(1021-102N) receive communication channel allocation information at every frame to set their time slots, and perform communication via the allocated time slots. A controller(100) allocates a plurality of time slots constituting a frame as communication channels to the plurality of nodes, broadcasts the communication channel allocation information to the plurality of nodes via pre-set time slots at every frame, and performs communication with each of the plurality of nodes via the set time slots. The controller includes the communication channel allocation information in a beacon and broadcasts it on the first time slot of the frame twice continuously. Each of the plurality of nodes detects a delay time from a point when the first beacon was completely received to a point when the second beacon is completely received, and subtracts double the delay time from a cycle of the standby time to detect a standby time. After the standby time lapses, each of the plurality of nodes sets the second time slot after a start of the second time slot lapses, and synchronizes timing with the controller.