Research Of Vehicle Monitoring System In Security And Data Communications

M2M (Machine to Machine) communications is an emerging technology in recent years. It is a type of communication between non-IT machine systems and IT systems on the platform of existing mobile communication and IP network technology. This dissertation studies two key problems of data communications of the vehicle supervisory system which is a specific M2M system. These two problems are the throughput and the security of data communications, and this dissertation is devoted to the researches of them and gives solutions. The main work of this dissertation is as follows:1. This paper studies the development status of M2M, five important techniques of M2M communication system and necessary conditions to communicate. Besides, it analyzes two key problems' about data communications of the vehicle supervisory system which is a specific M2M system. It studies low throughput and security of data communications, and puts forward a general solution.2. This paper proposes to solve the problem of throughput from the angle of optimizing the cdma2000 1x network, and selects the TCP solving mechanism over the wireless link layer to optimize it. But there is a disadvantage of the selected TCP solving mechanism, so this paper puts forward an adaptive TCP solving mechanism over the wireless link layer to avoid it. This paper implements adaptive TCP solving mechanism on the CDMA wireless communication module, and proves it to be able to enhance the throughput of data communications.3. By devoting to the researches of the data transmission security of the vehicle supervisory system, this paper proposes the thought of actualizing secure strategies on the wired and wireless network respectively. By adopting the thought of module design, this paper implements the SSL protocol on the CDMA wireless communication module, and resolves the security of the data transmission in the wireless channel.The work this paper finished solved data communications of cdma2000 1x perfectly, and methods it used could provide references to other M2M communication systems which used other wireless communication networks such as GRPS, WLAN to communicate.