An efficient channel allocation scheme in cell overlapping systems

With higher requirement for communications and tremendous growth of mobile subscribers, maximizing bandwidth utilization in cell overlapping systems has been attracting much attention. This work develops an efficient channel allocation scheme based on the cell order and channel order to improve the channel capacity in an overlapping cellular system. Experimental results demonstrate that the channel selection order from picocells to macrocells outperforms other schemes in terms of call blocking rate, primary channel utilization rate, and assignment latency. Besides, in order to improve the performance of channel allocation, it is preferred to allocate more channels to smaller cells under a fixed channel capacity in an overlapping system. Furthermore, experimental results demonstrate that the call blocking rate decreases with the increasing of the utilization rate of primary channels.