Ad Hoc网基于负载感知的多信道MAC协议研究

Study on Load Awareness Multi-Channel MAC Protocol for Ad Hoc Networks

对现有的多信道MAC协议进行了分类,并特别分析了基于负载感知的多信道MAC协议(LAMM)。LAMM协议能够根据网络流量动态地调整信道的分配,在网络时延和吞吐量上都有显著改善。但LAMM协议对多信道中存在的丢失接受者问题(missing receiver problem)无法很好地解决。针对这一问题提出了解决机制,很好地完善了LAMM协议。其中"成功退避"机制概念的提出,用来减轻由于丢失接受者问题产生的不公平现象。

This paper classifies existing multi-channel MAC protocols into different categories, especially analyzes Load Awareness Multi-Channel MAC protocol （LAMM）. LAMM protocol is ahie to dynamically adjust the number of channels being used according to the network Ioad and has great improvement on transmissJon delay and throughput. There is still missing receiver proWem existing in LAMM. To improve LAMM, corresponding mechanism is proposed to resolve this problem in the paper. The concept of “success backoff ” is proposed by author to alleviate unfairness caused by missing receiver problem.