RADIO COMMUNICATION METHOD, SYSTEM, AND DEVICE

PROBLEM TO BE SOLVED: To autonomously increase opportunities of transmission when a collision occurs in a state where mobile nodes are close to each other, and to reduce the number of nodes which try to transmission at a time by increasing nodes which stop transmission. SOLUTION: An arbitrary period within a super frame period of a fixed cycle is defined as an active period, and the rest periods are defined as a sleep period, and the active period is divided into a plurality of time slots. When a plurality of nodes 10 respectively use each time slot to perform two-way communication with time division, and if the plurality of nodes 10 respectively detect a collision in each time slot, a collision advertisement message is transmitted to a prescribed time slot among a plurality of time slots of the next active period or the present active period, and the next active period or the present active period is extended. COPYRIGHT: (C)2009,JPO&INPIT