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DCS: Distributed Asynchronous Clock Synchronization in Delay Tolerant Networks

机译:DCS:延迟容忍网络中的分布式异步时钟同步

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摘要

In this paper, we propose a distributed asynchronous clock synchronization (DCS) protocol for Delay Tolerant Networks (DTNs). Different from existing clock synchronization protocols, the proposed DCS protocol can achieve global clock synchronization among mobile nodes within the network over asynchronous and intermittent connections with long delays. Convergence of the clock values can be reached by compensating for clock errors using mutual relative clock information that is propagated in the network by contacted nodes. The level of clock accuracy is depreciated with respect to time in order to account for long delays between contact opportunities. Mathematical analysis and simulation results for various network scenarios are presented to demonstrate the convergence and performance of the DCS protocol. It is shown that the DCS protocol can achieve faster clock convergence speed and, as a result, reduces energy cost by half for neighbor discovery.
机译:在本文中,我们提出了一种用于时延容忍网络(DTN)的分布式异步时钟同步(DCS)协议。与现有的时钟同步协议不同,提出的DCS协议可以通过具有较长延迟的异步和间歇连接来实现网络内移动节点之间的全局时钟同步。通过使用相互联系的时钟信息补偿时钟误差,可以达到时钟值的收敛,该相互相对的时钟信息在网络中由联系的节点传播。时钟准确性的水平相对于时间而降低,以便解决接触机会之间的长时间延迟。提出了针对各种网络场景的数学分析和仿真结果,以证明DCS协议的收敛性和性能。结果表明,DCS协议可以实现更快的时钟收敛速度,从而将邻居发现的能源成本降低一半。

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