无线传感器网络中干扰定义方法改进与拓扑优化

MODIFYING INTERFERENCE DEFINITION IN WIRELESS SENSOR NETWORK AND OPTIMISING ITS TOPOLOGY

在无线传感器网络中,拓扑控制对于降低能耗,减小干扰,延长网络的寿命等具有重要作用。近年来,对拓扑结构的干扰、鲁棒性问题研究逐渐增多。提出一种拓扑优化方法,在保证不增加节点间通信干扰的前提下,提高网络的鲁棒性。首先,分析现有各类干扰定义方法,并进行修改。在新定义的基础上,以增加双向可增链路的方法对拓扑结构进行优化。最后,通过分析与仿真说明该方法能够提高拓扑结构鲁棒性。

Topology control has the important role in energy consumption reduction,interference decrease and network lifetime extension, etc.for wireless sensor network.The studies on the interference and robustness of the topology structure has been popularising during the past years.In this study,we will put forward a topology optimisation method for improving the robustness of the networks under the premise of not increasing the communication interference between the nodes.First,we will analyse various existing methods in regard to the interference definition,and make the modification on them.Based on the new definitions,we then optimise the topology structure in the way of adding the bidirectional incremental links.At last,it is shown by the analysis and simulation that the method can effectively improve the robustness of topology structure.