Ad Hoc网络时间同步技术研究  

Research on time synchronization in Ad Hoc networks

作　　者：杨海东[1] 邓勇[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《计算机工程与设计》2008年第21期5447-5450,共4页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2006AA701121)

摘　　要：通过分析影响时间同步性能的6类网络延时,对几种基本的无线传感器网络时钟同步协议进行了介绍和性能比较,提出了一种基于时延探测机制的Ad Hoc网络时间同步协议。协议通过构造特定的工作方式及信息格式,将各类时延误差作为一个整体来探测和消除。此外,由于时延探测过程和时间校正过程相互分离,减轻了时延探测过程中对于信息成功交互的时间要求,有利于降低网络的冲突和负担。分析表明,DMC-TS协议实现简单,扩展性好,由于针对所有的延时误差都进行了校正,因此能够提供较好的同步精度。By analyzing 6 kinds of delay time which influences the performance of synchronism, several main time-synchronization protocols for WSN are introduced and compared, and then a new time-synchronization protocol which based on delay-probing mechanism for Ad Hoc network is put forward. Through constructing specific structure and information form, the protocol can measures and eliminates all the delay time as a whole. Furthermore, because the delay-probing course is separated from the time-correcting course, the real-time requirement for information exchange can be lightened, it also help to reduce the conflicts and burdens of the network. It indicates by analyzing that DMC-TS protocol is simple to realize, but bearing a fine extending performance, in addition, it can offer better accuracy of synchronism because it has corrected all the delay time.

关 键 词：自组织网络 时间同步 时延探测 分离 实时性 

分 类 号：TN915.04[电子电信—通信与信息系统]