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随着传感器技术的快速发展以及在各行业的广泛应用,能量约束问题逐渐显现,成为制约无线传感器网络技术发展与应用的瓶颈之一,因此,网络环境中的状态估计必须考虑网络能耗所带来的新问题。首先从提高网络能效、延长网络寿命的角度,讨论了无线传感器网络中能量消耗的主要因素和已有的几种节能策略,包括优化介质访问控制(MAC)技术、数据融合技术与节能路由协议等。进一步,基于对状态估计问题的考虑,给出分布式传感器网络中的状态估计框架图,在考虑节点失效、链接失败等原因的基础之上,分析了基于节约能耗的传感器调度策略及无线传感器网络系统中存在的不确定性问题。最后,总结能量约束下分布式状态估计进一步研究的关注点。
With the rapid development of sensor technology and the widespread application in various industries, the problem of energy constraint gradually becomes one of the bottlenecks restricting the development and application of wireless sensor network technology. Therefore, the state estimation in network environment must consider the network energy consumption New question coming. Firstly, the main factors of energy consumption in wireless sensor networks and several existing energy saving strategies are discussed from the viewpoints of improving network energy efficiency and extending network life span, including optimizing medium access control (MAC) technology, data fusion technology and energy saving routing protocol . Furthermore, based on the consideration of the state estimation problem, the state estimation framework in distributed sensor networks is given. Based on the reasons such as node failure and link failure, the sensor scheduling strategy based on energy saving and wireless sensor Uncertainty in network system. Finally, the focus of further research on distributed state estimation under energy constraints is summarized.