CSMA/CA METHOD FOR AUTONOMOUS DISTRIBUTED SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an access control method which can obtain a high data transmission efficiency without taking a long time for return of a reach confirmation signal from a terminal even in the case of execution of error control like the FEC with respect to the radio medium access control technique in an autonomous distributed system. SOLUTION: An access point(AP) is provided in a service area, and a terminal directly communicates with another terminal in the service area in accordance with a frame synchronizing beacon signal 5 transmitted from the access point at the beginning of each frame and communicates with a terminal in another service area through the access point. In the autonomous distributed system constituted in this manner, reach confirmation signals (Ack or Nack) 14-1 to 14-3 to transmitted data are collectively transmitted in the leading part of the next frame, and a poll signal 10 is variably inserted between the reach confirmation signals and normal data with respect to each frame.