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由节点的位置和传输范围确定的无线网络拓扑结构对网络的性能有着重大的影响.拓扑控制通过调节节点的传输功率能够优化网络的性能,减少节点的功率消耗,延长网络的生存时间.文中提出一个分布式的拓扑控制算法,由该算法产生的拓扑结构具有最小能量特性,并且在网络的组成发生动态变化时,算法可以以响应的方式维护全网的连通性和全局的最小能量特性.该算法不仅适用于同质的无线Ad Hoc网络,也适用于异质的网络.仿真研究表明,提出的算法在平均节点度、传输功率的效率以及响应拓扑变化的平均节点数等方面均优于基于直接传输区域的拓扑控制算法.
The topology of the wireless network, which is determined by the location and transmission range of the nodes, has a significant impact on the performance of the network. Topology control can optimize the performance of the network by adjusting the transmission power of the nodes, reduce the power consumption of the nodes and prolong the lifetime of the network. A distributed topology control algorithm, the topological structure generated by the algorithm has the minimum energy characteristics, and the algorithm can maintain the connectivity of the whole network and the global minimum energy characteristics in a responsive manner when the composition of the network changes dynamically. The algorithm is not only applicable to homogeneous wireless Ad Hoc network but also to heterogeneous networks.The simulation results show that the proposed algorithm is superior to other algorithms based on average node degree, transmission power efficiency and average number of nodes responding to topology changes Topology Control Algorithm in Direct Transmission Area.