Out-Degree Based Clock Synchronization In Wireless Networks Using Precision Time Protocol

Monika Bansal, Apurva Gupta
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引用次数: 4

Abstract

In this paper, an extension of Precision Time Protocol (PTP) to enable energy-efficient clock synchronization between the nodes within Wireless Sensor Network (WSN) is proposed. PTP is nanosecond accuracy clock synchronization protocol in which nodes are organized in master-slave hierarchy on the basis of clock accuracy by means of Best Master Clock (BMC) algorithm. The algorithm considers clock accuracy to select best clock in the system. A novel modification of IEEE 1588 BMC algorithm for energy-constraint multi-hop WSN has been proposed to reduce clock convergence time and energy needed by considering out-degree of clocks without sacrificing synchronization accuracy. The new algorithm results in energy efficient clock synchronization that makes it most appropriate for low-power multi-hop wireless sensor networks. We present NS-3 simulation data that confirms the effectiveness of work.
基于精确时间协议的无线网络外度时钟同步
本文提出了一种精确时间协议(PTP)的扩展,以实现无线传感器网络(WSN)节点之间的高效时钟同步。PTP是一种纳秒级精度的时钟同步协议,该协议采用BMC (Best Master clock)算法,根据时钟精度将节点组织成主从结构。该算法考虑时钟精度,在系统中选择最佳时钟。针对能量约束型多跳无线传感器网络,提出了一种改进的IEEE 1588 BMC算法,在不牺牲同步精度的前提下,通过考虑时钟外度来减少时钟收敛时间和所需能量。新算法实现了高能效的时钟同步,使其最适合于低功耗多跳无线传感器网络。我们给出了NS-3模拟数据,证实了工作的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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