We explored the joint effect of synchronization window and offset/drift mode selection on the time synchronization of linear wireless sensor networks (LWSNs). Recent advances in the field along with the availability of capable hardware led to adoption of LWSNs in diverse areas like monitoring of roads, pipelines, and tunnels. The linear topology applications are susceptible to single point of failure; therefore, energy efficient operation of LWSNs is even more important than the traditional WSNs. To address the challenge, we investigate the time synchronization mode selection for the optimum operation of a multi-hop and low-overhead LWSN. We investigate two modes of synchronization: synchronization by using only offset and synchronization by using offset in addition to the clock drift. Furthermore, we investigate the effects of synchronization window size. Our experimental results reveal that computation of offset alone for smaller window sizes and resynchronization periods is sufficient in achieving acceptable degree of synchronization.

我们探讨了同步窗口和偏移/漂移模式选择对线性无线传感器网络（LWSN）的时间同步的联合影响。随着该领域的最新进展以及功能强大的硬件的可用性，LWSN在诸如道路，管道和隧道的监控等各个领域得到了采用。线性拓扑应用易受单点故障的影响。因此，LWSN的节能运行比传统的WSN更为重要。为了解决这一挑战，我们研究了时间同步模式的选择，以实现多跳和低开销LWSN的最佳操作。我们研究了两种同步模式：仅使用偏移量进行同步，以及使用时钟漂移以外的偏移量进行同步。此外，我们研究了同步窗口大小的影响。我们的实验结果表明，对于较小的窗口大小和重新同步周期，仅计算偏移量就足以实现可接受的同步度。