Ais And Its Key Technical Studies

Making a comprehensive survey of the developing shipping technology history, there are mainly two ways to increase the security of the vessels' navigating in the sea recently: one is depending on the VTS when ships arrive at harbors; the other one is depending on the rules of vessel collision when ships navigating in the sea. Radar is regarded as the mainly observation equipment of the two approaches which is used to supervise and identify ships. Although the function of radar keeping on being improved, its disadvantages are still exist. With the rapid developing of technology of communication and computers, AIS is born to live and will be stronger and stronger.The main application field of AIS is the vessel collision and VTS. AIS has provided the unprecedented vessels tag information and high real time and accurate parameter of ships navigating. It can provide more information, better real time and stronger anit-jamming than radar, also it has other virtues such as transmitting over obstacles. In a word, AIS can bring the revolutionary progress to the supervision of the vessels navigating in the sea.In foreign countries, many research works have been taken on the AIS technology, so the criterion of AIS has been updated continually. But in our nation, this aspect research is so poor and the relevant information is lack. In order to keep up with the international AIS's developing trends and master the applications of AIS technology, the article will research the component realization and is focus on the researches of transmission protocol, then according to the internationally published criterion of AIS, the article will establish a testing simulation system, by the way it will do preparative works for the latter productions. Through the theories researching, analyzing and testing simulation, it is concluded that:1 , The article is focusing on the researching of the transmission protocol of AIS and of the every parameter changing in them, so it is good for the latter production's manufacture, especially for the software developing aspect.2, The AIS simulation system is composed by the shipbom AIS and server application. The shipborn AIS can simulate many kind of work status and the sever application can analyze all kind of status of the AIS network's communication to decide the appropriate system capability. It has great meaning to the base station site selecting.3, The simulation in this article will provide a testing platform for the latter AIS relevant researches. For example, in the research of amalgamation problem between AIS and radar target in VTS, the simulation system can provide AIS simulation data.