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多信道所带来的MCC(Multiple Channel Coordination)问题是影响多信道系统性能的重要因素。文章针对无线Ad Hoc网络,提出了一种多信道协同MAC(Media Access Control)协议。该协议扩展了协同通信的概念,邻节点不再转发发送节点的数据,而是帮助发送节点发现和避免多信道中的MCC问题。文章还对经典二维Markov模型进行了改进,加入了多信道和协同机制,对所提协议进行了建模,分析了协同机制对系统性能的影响,并推导出了吞吐量性能和时延性能的表达式。仿真结果表明,采用协同机制可以有效解决MCC问题,文章中所提协议相对传统多信道MAC协议可以大大提高吞吐量和时延性能。
Multi-channel MCC (Multiple Channel Coordination) problem is an important factor affecting the performance of multi-channel system. Aimed at wireless Ad Hoc networks, this paper proposes a multi-channel collaborative MAC (Media Access Control) protocol. This protocol extends the concept of cooperative communication. Instead of forwarding the data of the sending node, the neighboring node helps the sending node to discover and avoid the MCC problem in the multi-channel. The article also improved the classical two-dimensional Markov model by adding multi-channel and cooperation mechanism, modeling the proposed protocol, analyzing the influence of cooperative mechanism on system performance, and deducing the throughput performance and delay performance Expression. The simulation results show that the cooperative mechanism can effectively solve the MCC problem. Compared with the traditional multi-channel MAC protocol, the proposed protocol can greatly improve the throughput and delay performance.