| 摘要 |
PURPOSE:To efficiently perform an allocation, by generating a probability reference value at a control station, generating a random number at a slave station, allowing the slave station having a generated random number less than the probability reference value to issue a channel allocation requesting signal, and decreasing or increasing the probability reference value sequentially. CONSTITUTION:First of all, the control station 1 issues a certain probability reference value signal Pa(0<Pa<1), and the slave stations 21-2n generate the different random numbers above zero and less than one independently. The control station selects the slave station generating the random number less than the probability reference value Pa out of the random numbers generated by the slave stations, and makes the slave station issue the channel allocation requesting signal. When two or more slave stations generate the random number less than the Pa, the control station issues the probability reference value Pb (0<Pb<Pa) at the next stage, and makes all of the slave stations requesting data channel allocation generate the random numbers. Thus, by decreasing the probability reference value which becomes reference to select the random number gradually, either one of slave stations can probably be selected. |
