An Efficient Channel Allocation Scheme in Cell Overlapping Systems

• Main Authors: Yi-Hsung Li, 李宜勳
• Other Authors: Chyi-Ren Dow
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/46847r

碩士 === 逢甲大學 === 資訊工程所 === 91 === With higher requirement for communications and tremendous growth of mobile subscribers, maximizing bandwidth utilization in cell overlapping systems has attracted 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. Various possible allocation orders of channel sets are investigated and compared with each other. Experimental results demonstrate that the scheme in which primary channel sets have higher priority than secondary channel sets, and the channel selection order is from picocells (small cells) to macrocells (big cells) outperforms other schemes in terms of call blocking rate, primary channel utilization, 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 an increase of the primary channels utilization rate.