Patent ID: 6778557
Filing Date: 2004-08-17
Classification: H04J,H04L

Abstract:
A point-to-multipoint communication system, in which a master unit and a plurality of slave units are connected by means of a transmission line, and point-to-multipoint communication is performed between the master unit and the plurality of slave units, characterized in that:the slave units each comprise information amount reporting means for presenting the master unit with reports regarding information amount necessary to transmit signals; and the master unit comprises calculation means for determining a maximum transmittable information amount of each currently active slave unit by allocating among the currently active slave units the maximum transmittable information amount that can be transmitted from the slave units to the master unit, calculating as a transmission-enabling information amount the information amount reported by the slave units if the information amount thus reported does not reach the maximum transmittable information amount, and calculating as the transmission-enabling information amount the maximum transmittable information amount if the information amount reported by the slave units exceeds the maximum transmittable information amount, and signal transmission instruction means for instructing each of the slave units to transmit signals on the basis of the transmission-enabling information amount calculated by the calculation means.