摘要
通过分析传感器节点的功耗模型和无线信道的传输模型,从理论上说明节点功耗控制的重要性以及如何确定最优的发射功率。文中介绍了基于动态路由协议和信道评估的网络拓扑控制方法的实现。首先通过动态路由建立树型拓扑,其次根据RSSI和LQI指标对信道进行评估后调整传感器节点的发射功率,最后阐述了网络拓扑结构的维护,保证网络的连通性和可靠性。实验结果表明,基于功率控制的拓扑控制算法可以提高系统的稳定性,延长网络的生命周期。
By analyzing the power model of sensor node and transmission model of wireless channel, the importance of node power consumption control and how to determine the optimal transmission power was illustrated in theory.The paper gived a detailed introduction about topology control method based on dynamic routing and channel assessment.Firstly,it constructed the topology of the network through dynamic routing protocol.Mter topology was established ,the index of RSSI and LQI were used to estimate the channel and adjust transmit power ofsensor node based on assessment results.Finally, WSN was needed to maintain its topology to ensure the connectivity and reliability of the network.The experiment results show that the topology control is an essential approach to improve the stability of WSN and prolong the network span.
出处
《仪表技术与传感器》
CSCD
北大核心
2016年第11期106-109,共4页
Instrument Technique and Sensor
