| 摘要: |
| 无线传感器网络中的"瓶颈节点"是指那些由于随机部署的原因而不得不成为连接两个或多个区域的孤立的节点.相对于其他节点,这类节点对网络的生存期有着更大的影响.如何找出这些"瓶颈节点"在图论中是一个找到最小割集的问题.基于实际部署的可行性,提出了一个新的"准瓶颈节点"的概念,它对网络具有与"瓶颈节点"类似的影响,但是可以很容易地通过分布式算法找出来.通过分析和仿真,证明了"准瓶颈节点"对网络行为(包括能量消耗速率、丢包率)的巨大影响.最后,提出了一种分布式算法来发现这些节点,并提出了两种有效的解决思路来减小它们的不利影响. |
| 关键词: 网络生存期 准瓶颈节点 能量消耗 |
| DOI： |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.90204003, 60402012 (国家自然科学基金); the Collaborative Construction Program of Beijing Municipal Commission of China under Grant No.XK100130438 (北京市重点学科资助项目); the Nokia (China) Research Center (诺基亚中国研究中心资助项目) |
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| Study on Bottleneck Nodes in Wireless Sensor Networks |
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TIAN Le,XIE Dong-Liang,HAN Bing,ZHANG Lei,CHENG Shi-Duan
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| Abstract: |
| “Bottleneck Nodes” are those connecting two or more areas alone with the reason of the deployment. Compared to other nodes, this kind of nodes are more important to the lifetime of the whole network. How to find these nodes is a problem about how to find the minimum cut set in graph theory, and is difficult to implement in a distributed way. In this paper, a new kind of nodes named “quasi-Bottleneck Nodes” which have similar effect on the performance of the wireless sensor network and can be found out much more easily is introduced. Theoretical analysis and extensive simulation show that “quasi-Bottleneck Nodes” have a significant impact on the performance of the whole network (including the speed of energy consumption and packet lost ratio), and a distributed algorithm to find out all the “quasi-Bottleneck Nodes” and two effective solutions to eliminate the bad effect of these nodes are presented. |
| Key words: network lifetime quasi-bottleneck node energy consumption |
