LAN环境中的分布式同步方法研究  

On Distributed Internal Synchronization in a LAN Network

作　　者：王文[1] 杨磊[2] 

机构地区：[1]重庆电子工程职业学院,重庆401331 [2]中国科学技术大学计算机科学与技术学院,合肥230027

出　　处：《西南师范大学学报（自然科学版）》2014年第6期70-77,共8页Journal of Southwest China Normal University(Natural Science Edition)

摘　　要：为了满足LAN网络环境下各节点对于同步精度的要求,提出了一种分布式实时同步方法,该方法基于中间层的同步模型,具有基本的一致性约束和严格的同步误差控制.该方法在初次同步与后续的周期性再同步过程中,通过对进程进行功能划分与合理规划,为各节点提供了快速有效的通信环境.在RT Linux环境下应用该方法对实验节点进行同步,并对实验前后的时钟误差进行测量.结果表明,在小规模的分布式LAN环境下,该方法能够在长时间的运行中实现节点间的同步效果并将时钟误差严格控制在合理的范围内,有效地提升了同步效率,保证了LAN环境的实时性.To meet rising demands of synchronization precision in distributed nodes in LAN network, a specialized scheme has been proposed based on the intermediate-level modeling for initial synchronization and periodical resynchronizations with basic concurrency control and tight bounds. Several representative threads have been designed and well scheduled with definite and thorough functional partitioning inside to create a fast and efficient circumstance for communication between nodes. An experimental realization based on RT Linux kernel and corresponding measurements have been accomplished. The results indicate that in a small-scale distributed environment, the nodes are able to be well synchronized during in the long run with hundreds of resynchronizations and the deviations are significantly limited in a reasonable range. The proposed scheme effectively promotes the performance of clock synchronization in the LAN network.

关 键 词：时钟同步 中间层建模 线程规划 LAN网络 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]