Compensated Time Synchronization in WSN with Multiple Reference Nodes
Compensated Time Synchronization in WSN with Multiple Reference Nodes
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DOI：
10.1109/ncm.2008.225
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
Woo Hyuk Jang;Youngmi Kwon
中科院分区：
文献类型：
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作者：
Woo Hyuk Jang;Youngmi Kwon
最近的技术进步，如MEMS和低功耗无线传感器设备的普遍部署，导致了大规模的无线传感器网络。时间同步在大规模部署的传感器节点中非常重要，用于各种目的，包括传感器数据融合和能源效率。TIME_SYNC_ERROR是由多种因素造成的。在多跳无线传感器网络中，最主要的影响因素是随着跳数的增加而累积的时间误差。在多个参考节点的环境中，在网络中开始节点同步之前，需要精确地同步参考节点。通过设置多个时间参考节点(MTRN)来补偿多个参考节点之间的时间差，从而提高了TSync算法在多个参考节点环境下的精度。仿真结果表明，该协议减少了累积的时间同步误差，从而提高了无线传感器网络的整体精度。
Recent technological advances such as MEMS and pervasive deployment of low-power wireless sensor devices have led to large-scaled wireless sensor networks. Time synchronization is important in largely deployed sensor nodes for various purposes including sensor data fusion and energy-efficiency. The time_sync_error is occurred to many factors. The main factor is that accumulated time error as hop count increases in multi-hop wireless sensor network. In the environment of multiple reference nodes, the reference nodes should be synchronized exactly before starting the node synchronization in the network. This paper suggests improved accuracy of the TSync algorithm in the environment of multiple reference nodes, by setting Multi time reference node (MtrN) to compensate the time differences among multiple reference nodes themselves. The simulation shows that proposed protocol reduces the accumulated time_sync_error; so improves the overall accuracy in WSN.