Dynamic channel allocation performance under uneven traffic distribution conditions

We study the performance of dynamic and fixed channel allocation methods in an interference-limited cellular system under unbalanced load conditions. In the model developed, the channel assignment process is distributed and is governed by the interference environment (C/I). In addition, power control is used in a distributed manner to improve the C/I of an active (call in progress), or inactive channel ( for call admission). System performance is addressed through blocking probability, throughput and call quality. The effect of interference on the efficiency of the above system as compared to FCA is explored under various load imbalances. The sensitivity of the system to load imbalance is also assessed. It is concluded that DCA offers improved throughput performance, responds well to load variations and mobility, and is suitable for distributed implementation.