Asymmetrical Round Trip Based Synchronization-Free Localization in Large-Scale Underwater Sensor Networks
Asymmetrical Round Trip Based Synchronization-Free Localization in Large-Scale Underwater Sensor Networks
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DOI：
10.1109/twc.2010.090210.100146
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发表时间：
2010-11-01
影响因子：
10.4
通讯作者：
Poor, H. Vincent
中科院分区：
文献类型：
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作者：
Bin Liu;Chen, Hongyang;Poor, H. Vincent
水下传感器网络（UWSNs）已被提出用于许多与位置相关的应用，如海洋数据收集、污染监测、地雷侦察等。准确的节点定位对于实现这些应用的潜在收益起着重要作用。虽然近年来针对地面传感器网络提出了许多定位算法，但由于UWSNs缺乏快速可靠的通信信道，这些算法无法直接应用于UWSNs。此外，由于其收敛速度慢和通信开销高，为小型UWSNs设计的分布式定位算法不适用于大型水下传感器系统。为了在大规模UWSNs中实现准确、节能的节点定位，提出了一种基于不对称往返定位（ARTL）算法。该算法具有较低的计算复杂度和良好的可扩展性。在不需要时间同步的情况下，该算法可以在大规模uwsn中实现高精度测距。仿真结果证明了该设计在定位精度和能耗方面的有效性。
Underwater sensor networks (UWSNs) have been proposed for many location-dependent applications such as oceanographic data collection, pollution monitoring, mine reconnaissance, etc. Accurate node localization plays an important role in realizing the potential gains of these applications. Although many localization algorithms have been proposed for terrestrial sensor networks in recent years, it is not feasible to directly use these algorithms in UWSNs since UWSNs lack a fast and reliable communication channel. Further, due to their slow convergence speeds and high communication overhead, distributed localization algorithms designed for small-scale UWSNs are not practical for large-scale underwater sensor systems. To achieve accurate and energy efficient node localization in large-scale UWSNs, an asymmetrical round trip based localization (ARTL) algorithm is proposed in this paper. This algorithm has low computational complexity and excellent scalability. Without time synchronization, this algorithm can achieve highly accurate ranging in large-scale UWSNs. Simulation results demonstrate the effectiveness of our design in terms of both localization accuracy and energy consumption.