论文标题:分布式MANET的多址技术及抗毁性研究
Study on MAC Protocol and Roubustness of Distributed MANET
论文作者
论文导师 李建东,论文学位 硕士,论文专业 军事通信学
论文单位 西安电子科技大学,点击次数 86,论文页数 67页File Size882K
2007-01-01论文网 http://www.lw23.com/lunwen_852558672/
MANET ;TDMA ;Synchronization; Compensation algorithm
本文设计了一种适用于分群分布式MANET的多址接入协议,并提出了一种提高网络抗毁性的补偿算法。 分群的分布式MANET是由具有移动性的节点组成的自组织的网络,这种网络中有若干群,群内有群首节点、普通节点和网关节点三种类型的节点。针对这样的特点,本文提出了一种适用于该网络的TDMA协议,运行该协议的节点的入网过程包括以下几个部分:节点开机、节点同步及节点开始正常工作。本文研究的一个重点是节点同步,因为这里的同步是完全面向多跳的分布式网络的,它不需要GPS定时信号的支持,因此,它是节点入网的关键所在。本文研究的另一个重点是提高网络的抗毁性,按照网络中节点的类型,讨论了各类节点失效对网络的影响,并提出了相应的补偿算法,使得在通信受阻时网络具有自适应性,能够立刻补偿,尽快恢复其正常化。最后,本文对提出的协议及算法进行了仿真,并对结果分析、比较,结果表明,该接入协议具有较好的性能,补偿算法能在一定程度上提高网络的抗毁性。
A TDMA protocol used for the cluster-based distributed MANET (Mobile Ad hoc Network) is designed, and a compensation algorithm to improve the robustness is proposed in this paper. The cluster-based distributed MANET consists of several clusters, in which three kinds of nodes are included: cluster heads, ordinary nodes and gateway nodes, and the nodes in it are self-organized. According to these characteristics, a TDMA protocol is proposed for this MANET. The whole operation process includes three parts: power on, synchronization and working. Since it applies to a distributed wireless network without GPS timing signals, synchronization, which includes a gross synchronization and an accurate synchronization, is an emphasis in this paper, in order to get accurate timing information from its cluster head. Besides, the robustness is another emphasis. The influence of nodes failure on the network is discussed in terms of the node type mentioned above. A compensation algorithm is put forward in order to compensate the network. Finally, both the proposed protocol and the algorithm are simulated, and their results are analyzed. The results show that the MAC protocol can better fulfill the needs of the network, and the compensation algorithm provides some degree of improvment to the robustness.
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