Design and analysis of multi-channel MAC protocol with channel grouping
in wireless ad-hoc networks <Abstract> This paper presents Multi-channel MAC protocol with channel grouping ( McMAC-CG) for multi-channel ad-hoc networks. The proposed protocol has both concepts of the multiple rendezvous and the single control channel protocols, which were proposed as a MAC protocol for multi-channel ad- hoc network without centralized stations. In the McMAC-CG, all channels are divided into some groups and each group has a control channel. Network nodes circulate among the groups and channel negotiations are carried out on a control channel of the groups. By applying the channel grouping, it is possible to enhance network throughput without reducing the channel-usage probability. Because there is an optimum group number for obtaining the highest throughput., this paper gives analytical expressions of maximum network throughput for McMAC-CG as a function of system parameters. The optimum group number and contention window size are predicted by solving throughput-maximization problem from analytical expressions. The effectiveness of the proposed protocol is shown from simulation results. In addition, the validity of the analytical expressions is confirmed from quantitative agreements between analytical predictions and simulation results. |