水下传感器网络冗余设计

Study of Reliability Redundancy Design of Underwater Sensor Networks

冗余设计可以有效地延长水下传感器网络寿命和提高网络可靠性,基于可靠性理论,考虑水下传感器网络环境及节点垂直移动等约束,在对冗余非共享方案研究的基础上,结合水下传感器网络特点,提出了适合于水下传感器网络特点的冗余共享设计方案,并给出了冗余共享方案的可靠性模型,通过数值计算,研究了网络可靠性变化曲线及冗余节点数与网络寿命的关系。经过MATLAB软件仿真,表明在同一网络寿命情况下,相对于冗余非共享方案,冗余共享方案所需冗余节点数更少,降低了网络部署成本,达到了冗余优化的目的。

It is very important to prolong network＇ s lifetime and increase reliability in USN, redundancy design could prolong network~ s lifetime and increase reliability. This paper proposes the redundancy design for USN based on reliability theory. It takes vertically moving leash of USN sensors and renovating periods leash into account and based on the studying the redundant unshared scheme. At the same time,The redundant share scheme was proposed. And the reliability model is also proposed. The relationship between the number of redundant sensors and network lifetime is researched by a typical calculation, The simulation results of matlab simulation shows that redundancy share scheme need fewer redundancy sensors and could achieve the effect of prolonging network~ s lifetime and increasing reliability.