Dual mode multiple access method for common radio channel

摘要

In a radio communications system wherein a common channel is accessed from multiple terminals, any of the terminals is allowed to transmit a packet through the common channel to a base station on a random access mode when the packet received at the base station has a low error rate, and a specified one of the terminals is allowed to transmit a packet on a controlled access mode when the packet received at the base station has a high error rate.