Performance analysis for common hopping multi-channel protocol

In order to accurately analyze the throughput performance of common hopping (CH) multi-channel protocol in IEEE 802.11, the performance analysis model for CH is proposed and mathematical normalized throughput is analyzed. On the basis of new understanding of distributed coordination function mechanism throughput formula under the saturated conditions proposed by Giuseppe Bianchi, the throughput formula of the CH multi-channel protocol is derived. The number of channels with maximum multiples is found by analysis. When the number of channels increases to the number of channels with maximum multiples, CH will reach the optimal state to enhance the throughput. At last the effect of data rate, channel switching time, the number of channels and the number of stations on CH throughput performance is illustrated by simulation. The main conclusions are that with the increase of channel switching time and/or data rate, the number of channels with maximum multiples shows a serious decline in trend. When the number of channels with maximum multiples declines to 1, CH multichannel protocol can not enhance the throughput any more.