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Analysis of the call blocking rate of two-hop-relay cellular system in the dead spots

The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 46-52页

作者： LU Wei-feng WU Meng Communication and Information Engineering Institute Nanjing Universityof Posts and Telecommunications Nanjing 210003 China

In a traditional cellular system, the call requests initiated by mobile stations （MSs） must be carded through a base station （BS） via the cellular interface, but when MSs are located in the dead spots, their call requests will be blocked because the MSs cannot communicate with the BS. It is considered to relay these blocked calls requested using Ad-hoc network, which will improve the performance of the system as a whole. This article first introduces a novel architecture of the two-hop-relay cellular system in the dead spots, and then analyzes and compares the call blocking rate of the traditional cellular and the two-hop-relay cellular system respectively under three different conditions. The first and second conditions are the traditional cellular system without and with taking account of the effect of the dead spots. The third condition is the two-hop-relay cellular system with taking account of the effect of the dead spots. Numerical analytical result shows that the two-hop-relay cellular system can obtain lower call blocking rate than the traditional cellular system when considering the effect of dead spots. Consequently, this novel architecture can resolve the problem of coverage limitation of a traditional cellular system effectively.

关键词： two-hop-relay cellular system call blocking rate,dead spots

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