计算机科学 ›› 2017, Vol. 44 ›› Issue (12): 64-67.doi: 10.11896/j.issn.1002-137X.2017.12.012
汤璘,刘俊霞,赵丽,齐兴斌
TANG Lin, LIU Jun-xia, ZHAO Li and QI Xing-bin
摘要： 针对分布式认知无线电网络(DCRN)中节点时间同步的问题,提出一种基于M&S同步模型的节点协作式时间同步机制。首先,选定的主用户(PU)通过控制信道将其空闲频谱列表广播到邻居节点,以确定节点对之间的可用公共信道；然后,邻居节点以该PU节点为参考,在公共信道上发送同步信息,并通过M&S同步模型调整内部计时器,从而实现时钟同步；经过多次迭代,最终实现全网时间同步。实验结果表明,该方案能够实现DCRN的时间同步,同时具有较快的收敛速度和较低的开销。
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