| 摘要 |
<p>PURPOSE:To decrease the crosstalks and to reduce the deterioration of the certainty of communication by setting proviously the number of receiving timings with which a base station receives the discrimination codes and at the same time setting again at random the timing by which each slave station sends back the discrimination code every time a specific code is received. CONSTITUTION:The number of receiving timings with which the discrimination codes sent back after a base station calls an unspecified station (slave station) are received is synchronous with the transmitting timing of the discrimination code of the slave station. However the timing available at the slave station is limited to just one of those receiving timings and this timing is decided at random. In an example shown in the diagram, the discrimination codes of slave stations A and D are coincident with each other by change at the timing '1'. While the discrimination codes of the slave stations B and C are divided at timings '3' and '4' and transmitted. Then no station has transmission at timing '2'. Therefore the discrimination codes of both stations A and D are received with crosstalk at he timing '1'. Then the discrimination codes of both stations B and C are received in a correct way at the timings '3' and '4'.</p> |
