Out-Degree Based Clock Synchronization In Wireless Networks Using Precision Time Protocol
TL;DR: An extension of Precision Time Protocol to enable energy-efficient clock synchronization between the nodes within Wireless Sensor Network (WSN) to reduce clock convergence time and energy needed by considering out-degree of clocks without sacrificing synchronization accuracy is proposed.
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.
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References
197 citations
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...Each boundary clock creates a branch point in the hierarchy tree, while the leaves of the tree are formed by ordinary clocks [6]....
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136 citations
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...Though most of the PTP implementations have already been done in wired networks such as Ethernet [8]- [10] nevertheless, it is still an active research area....
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...Another work reported in [12] achieves microsecond accuracy using COTS hardware and software generated timestamp....
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...11 for industrial use cases, in particular, is given in survey paper [21]....
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...The authors of [11] present kalman filter preprocessor with skew-PI for wireless networks to get better precise synchronization than offset-PI based on conventional filter....
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