无线传感器网络中标签节点要求体积小、功耗小.标签节点接收信号所需要的同步信息由标签节点的同步电路提取.精确同步方案会增加标签节点的复杂度,因此提出用锚节点主动同步标签节点这一方案,这个方案可以在不考虑锚节点复杂度的情况下,减小标签节点的复杂度,进而力求减小标签节点的功耗.分析了这个方案的捕获条件和实现的算法,评估了算法的平均捕获时间和需要标签节点确认反馈的平均次数,仿真结果验证了理论分析的准确性,表明这个方案是可行的.%The tag node demand small volume and low consumption in wireless sensor network. Synchronal information which is used for the tag node receiving signals is extracted by the synchronizer in the tag node. The precise synchronization scheme will increase the complexity of the tag node, so a scheme that the anchor node synchronizing the tag node actively is introduced. This scheme can reduce the complexity of tag node and strive to reduce energy consumption under taking the complexity of anchor node no account. Acquisition conditions and an algorithm are analyzed about this scheme. The performance of the proposed scheme is evaluated in terms of mean acquisition time and mean times which are required by the tag node confirming feedback. Finally, the simulation results verify the accuracy of theoretical analysis, and show that the scheme is feasible.
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