Energy-Efficient Data Forwarding for State Estimation in Multi-HopWireless Sensor Networks
Energy-Efficient Data Forwarding for State Estimation in Multi-HopWireless Sensor Networks
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DOI：
10.1109/tac.2015.2461831
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发表时间：
2016-05-01
影响因子：
6.8
通讯作者：
Xie, Lihua
中科院分区：
文献类型：
--
作者：
Cheng, Peng;Qi, Yifei;Xie, Lihua
状态估计在基于无线网络控制系统的各种应用中具有重要意义。无线传感器节点通常通过一系列中继节点将其数据转发到远程接收器，以节省其有限的能量。在本技术说明中，我们研究了多跳无线网络中用于精确远程状态估计的数据转发策略设计。根据中继节点计算能力的不同，本文首先提出了两种中继策略，即直接转发策略（DFS）和本地处理转发策略（LFS）。从理论上分析了两种算法的稳定性条件、估计性能和能量效率。我们进一步提出了一个事件触发转发策略（EFS），这是能够平衡的估计精度和中继能量消耗。数值例子证明了我们设计的有效性。
State estimation is of great importance in various applications based on wireless networked control systems. Wireless sensor node usually forwards its data to a remote receiver through a series of relay nodes in order to save its limited energy. In this technical note, we investigate the data forwarding strategy design for accurate remote state estimation in multi-hop wireless networks. Based on different computational capability of relay nodes, we first propose two relay strategies, namely, Direct Forwarding Strategy (DFS) and Local Processing and Forwarding Strategy (LFS). Stability condition, estimation performance and energy efficiency of both the two strategies are theoretically analyzed. We further propose an Event-triggered Forwarding Strategy (EFS) which is able to balance the estimation accuracy and relay energy consumption. Numerical examples are employed to demonstrate the effectiveness of our design.