Reducing connected dominating set size with multipoint relays in ad hoc wireless networks

Xiao Chen, Jian Shen
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引用次数: 34

Abstract

Broadcasting is an important communication mechanism in ad hoc wireless networks. The simplest way to do broadcasting is pure flooding, in which each node retransmits a packet after receiving it, thus generates many redundant retransmissions. The rule based on dominating sets can reduce the number of retransmissions. A dominating set is a set of nodes such that any node in the network is a neighbor of some element in the set. However, computing a minimum size connected dominating set is NP hard. Several existing algorithms use the idea of multipoint relays to reduce the size of the connected dominating set. The authors of this paper observed that these algorithms can be further improved. Thus, three improvements are introduced here. It is proved that these improvements can compute a connected dominating set of the network, and simulation results show that they can further reduce the size of the dominating set. Also, extensions to power-aware broadcasting algorithms are discussed.
利用多点中继减少自组织无线网络中的连接支配集大小
广播是自组织无线网络中一种重要的通信机制。最简单的广播方式是纯泛洪,即每个节点在接收到数据包后重新传输数据包,从而产生许多冗余重传。基于支配集的规则可以减少重传次数。支配集是节点的集合,使得网络中的任何节点都是集合中某个元素的邻居。然而,计算最小规模的连通支配集是NP困难的。现有的几种算法使用多点中继的思想来减小连接支配集的大小。本文作者观察到这些算法可以进一步改进。因此,这里介绍了三个改进。证明了这些改进可以计算出网络的连通支配集,仿真结果表明它们可以进一步减小支配集的大小。此外,还讨论了对功率感知广播算法的扩展。
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