The Technical Analysis and Design of The GPS Vehicle Position System Software

Basing on the vehicle position system using the SMS module,we analyse the requirements and bring forward a three-layered model,which is very appropriate for the communications softwareIt consists of the user interface layer,the communications services layer and the data services layerWe focus on the communications services layer that is the technical key of this modelA scheme is designed to combine the asynchronous communications and multithreading technologyIt will improve the efficiency,reliability and controllability greatly