CELLULAR RADIO SYSTEMS AND METHODS FOR THEIR OPERATION

摘要

A cellular radio system comprises a plurality of base stations, each base station having a first group of channels having a first re-use rate and a second group of channels having a second re-use rate less than the first re-use rate. The cellular radio system is operable upon receipt of a service request for communication with a radio terminal to monitor a parameter indicative of transmission performance between the terminal and one of the base stations of a channel of the first group of channels of the base station. When the monitored parameter indicates adequate transmission performance on the channel of the first group of channels and a channel of the first group of channels is available, the cellular radio system allocates a channel of the first group of channels to the terminal. When the monitored parameter indicates inadequate transmission performance on the channel of the first group of channels, the cellular radio system allocates a channel of the second group of channels to the terminal. When no channel of the first group of channels is available, the cellular radio system allocates a channel of the second group of channels to the terminal. The cellular radio system is useful where increased capacity is needed.