The lower PER leads to the improvement of throughput performance as shown in Fig. 18b. The network-wide throughput improves at most 17 percent. The collision avoidance effect of the RTS/CTS scheme does not lead to throughput improvement, since it causes the exposed terminal problem which leads to reduced transmission attempts. So our channel allocation approach without the RTS/CTS scheme shows the best performance. This leads us to conclude that the RTS/CTS scheme lowers PER at the expense of throughput. Fig. 18c shows throughput fairness performance. The RTS/CTS scheme does not have a significant impact on the performance while the channel allocation approach has