Intelligent Transportation (information) System Plug-in Platform Design And Implementation,

Intelligent Transportation System(ITS) is one of the field that has been paid much attention to nowadays. ITS play an important role in the field of Intelligent Transportation. As a large distributed database application, it has many difficulties, such as to communicate with different software, different hardware, different operating systems, different database system, to be overcome, transportation is the most important one.Considering the security and some other specialties, many ITS systems use message-oriented middleware(MOM) as a tool of network transportation. But because most MOM are designed to be general-purpose software, the users had to redesign their software, the use of MOM in ITS did not satisfy the users. We want to designed a new platform for ITS' data transportation.The platform is based on the thought that ITS should use its own platform, and ITS' applications can easily be integrated on it. And the platform mainly offers reliable network transportation.Many MOM use UDP as its transport protocol, and most of them use stop-and-wait protocol to achieve reliable and in-order transmission, and few use sliding-window protocol(SWP), for SWP should come with congestion control and avoidance. This platform use SWP over UDP, using flow control and congestion control mechanism to get the maximum throughput, and use RTT measurement, slow start, congestion avoidance, fast retransmit and fast recovery algorithms. The achievements of this research include the design and implementation of the platform prototype on WIN32 and Linux. And in the prototype, we focus on the reliable transmission over UDP and flow control and congestion control.