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Hybrid channel assignment and reuse partitioning in a cellular mobile telephone system

Radio bandwidth for mobile communications is very scarce. Therefore, attempts are made to increase spectrum efficiency. Investigations of these attempts have so far concentrated mainly on systems with small reuse patterns containing a relative small number of channels, and few comparisons between these systems and systems with larger number of channels have been performed. In this paper, hybrid channel allocation and reuse partitioning are investigated with respect to blocking probabilities and channel utilization. It is shown that the effects of hybrid allocation are less pronounced in small reuse patterns than in large. This is true for the advantages at low load as well as the disadvantages at high load. Reuse partitioning can on the other hand give substantial capacity increase, and the usual and unwanted side effect of unequal service over the system area can be decreased by the introduction of state protection.