Performance of multiple access protocols for data communication in PMR systems

One of the main areas of interest in these systems is the optimisation of the use of the return link between mobiles and their base station. Users expect to receive a good response; operators aim to pack the highest possible number of users on a single channel to maximise utilisation and make efficient use of spectrum. This paper describes results from a simulation model that encapsulates the generic aspects of multiple access methods for a range of PMR systems. The first phase of the work has concentrated on the medium access protocols for a single channel in a cell. The second phase considers the system aspects for a range of channels over many cells and the related teletraffic issues