基于时延探测机制的Ad Hoc网络时间同步协议  

Time synchronization protocol for Ad Hoc network based on delay-probing

作　　者：杨海东[1] 李建海[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《计算机应用》2008年第12期3041-3044,共4页journal of Computer Applications

基　　金：国家863计划项目(2006AA701121)

摘　　要：基于预约和动态时隙分配的MAC协议能够为实时业务传输提供良好的QoS保证,其关键技术之一是如何实现节点间的同步。通过分析影响时间同步性能的6类时延,构造了一种基于时延探测方式的Ad Hoc网络时间同步协议(DMC-TS协议),协议通过发送和转发少量的探测码来完成节点间时延的测定。由于协议中时延探测过程和时间校正过程相互分离,可以减轻网络的冲突和负担,有利于降低时延探测的时效性要求。分析及仿真表明,DMC-TS协议实现简单,精度能够和TPSN协议相比拟。The MAC protocol based on reservation and dynamic-slot distribution can offer fine QoS guarantee for real-time traffic. One of its key technologies is how to realize the synchronism among the nodes. Therefore. a new time synchronization protocol for Ad Hoc network by means of delay-probing was put forward, which combined the merits of DMTS protocol and TPSN protocol. Through transmitting and relaying a little probing code. the protocol could complete the retardation measuring. Owing to the separation between delay-probing course and time-correcting course, the conflict and burden of the network could be lightened. Analysis and simulation indicate that DMC-TS protocol is simple to realize, and possesses a precision which can be compared with TPSN protocol.

关 键 词：时延测量 探测 网络分层 时间同步 

分 类 号：TN393.04[电子电信—物理电子学]