RADIO COMMUNICATION DEVICE, CW MAXIMUM VALUE ACQUISITION DEVICE, CW MAXIMUM VALUE ACQUISITION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a CW maximum value acquisition device capable of acquiring the CW (Contention Window) maximum value that can satisfy desired communication quality while restraining increase in collision of radio signals.SOLUTION: A CW maximum value acquisition device 2 comprises: an unused rate acquisition unit 21 for acquiring an unused rate indicating a rate of an idle time of radio resources; a request period acquisition unit 22 for acquiring a request period which is a period necessary to succeed in radio transmission once or more in radio communication using a random back-off period; and a maximum value acquisition unit 23 for acquiring the CW maximum value which is the maximum value of a contention window so as to be the maximum value within a range of succeeding in radio transmission within a request period using the unused rate.