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引用次数: 0
摘要
由于无线传感器网络是能量约束网络，在选择同步方案时，如何消除传输冲突并保持高能量效率与时钟精度同等重要。为了实现这一目标，我们提出了一种新的同步方案——fdss (Follow Data Stream synchronization)。在FDSS中，当选定节点(SN)与参考节点通信时，在数据帧和ACK帧中加入时间戳，其他正常节点通过监听这两帧并利用其中的时间信息实现同步。没有用于同步的特殊帧，FDSS可以将通信开销降至最低。介绍了FDSS的基本概念，研究了在确定性调度的wsn中，如何根据传感器所需的同步周期和数据包间隔选择携带时间戳的选定节点。
The Follow Data Stream Synchronization protocol for deterministic wireless sensor networks
As WSNs are energy constraint networks, how to eliminate transmission collisions and keep high energy efficiency are as crucial as the accuracy of a clock when selecting synchronization scheme. To achieve the goal, we propose a novel synchronization scheme-FDSS (Follow Data Stream Synchronization). In FDSS, time stamp will be added into the data and ACK frame when a selected node (SN) communicates with the reference node, while other normal nodes will achieve synchronization by overhearing the two frames and using the time information in them. There are no special frames for synchronization, and FDSS can reduce the communication overhead to the minimum. This paper introduces the basic concept of FDSS and investigates how to choose the selected node (SN) to carry time stamp in deterministic scheduled WSNs according to sensors' demanded synchronization period and data packet interval.
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