| 摘要 |
<p>The invention relates to a communication system comprising a transmission medium, users connected in groups to the transmission medium through a convergence point, and a main station designed to receive data transmitted by the users over the transmission medium. The access to the transmission medium is limited for one and the same group of users at any given moment. According to the invention, the main station comprises means for assigning to the users access rights to the transmission medium by taking into account their membership of a group of users.</p> |
