The Design And Realization Of Wireless Sensor Network Time Synchronization Package

Wireless sensor network is the technology that is concerned by world, and time synchronization is an important component of it.This paper implements a time synchronization software package of wireless sensor network. The software package consists of four components: Level based time synchronization component, Flooding time synchronization component, Event driven based time synchronization component (proposed by this paper) and rapid time synchronization component. This paper extends two functions: Timer and Alarm to apply the request of nodes coordinated action.This paper implements the software package on real sensor nodes—the Hawk node. The operation system it uses is TinyOS, and the language is nesC. This paper gives the data structures that these components use, also gives the details of the implementation and designs of configurations, modules and interfaces.This paper designs the bottom software of system clock. Designs and implements the time-stamping function according to the hardware specialties.Finally, this paper gives the experiments results ,and points out lacks and the directions of further research.