基于信噪比-虚拟力算法的水下传感网络节点移动策略研究

Research on Mobile Strategy for Nodes in Underwater Wireless Sensor Networks Based on the SINR Virtual Force Algorithm

针对水下传感器网络节点移动过程中造成网络拓扑结构变化导致的节点能耗不均衡、网络吞吐量和生存时间下降的问题,提出一种基于信噪比的虚拟力算法。首先,考虑水下网络信道传输特性,构建信道信噪比数学模型;然后,以信噪比和节点度双指标修正传统虚拟力模型,讨论节点移动策略;最后,建立数值仿真环境验证移动策略的有效性。结果显示:相比于传统节点移动策略,本文所提出的移动策略可以有效提升网络吞吐量,延长网络生存时间。

For the problem of the uneven node energy consumption,the decline of network throughput and survival time caused by variable network topology in the nodes movement of Underwater Wireless Sensor Network.A virtual force algorithm basedon signal-tonoise ratio is proposed.Firstly,the channel transmission characteristic of underwater network is considered to establish the channel signal-to-noise ratio(SNR)mathematical model.Then the traditional virtual forcemodel is modified by SNR and node degree to determine the node mobility strategy of the UWSN.Finally,a numerical simulation environment is established to verify the effectiveness of the mobile strategy.The simulation results show that the node mobile strategy proposed can effectively improve the network throughput and prolong the network lifetime comparing with the traditional node mobility strategies.