The Method Of Accessing Remote Database Based On Mobile Agent

Some statistics show that 80 percent of information relates to spatial position in daily life. It often consumes a great deal of energy to locate some person or some place. As the pace of modem life is accelerating, current geography information is becoming one of the most desirous information. Location Based Service (for short LBS), based on Geography Information System (for short GIS) just be able to meet with the people's need.At first, this paper introduces the development and functions of LBS compendiously. And then analyses the insufficient of LBS: some portable facilities that are the main medium of various spatial information, such as, cellphone, PDAs etc, can't reach the standards of normal PC in computing speed of CPU, capacity of RAM, size of screen or runtime and multi-task coordination of operating system. Moreover current wireless network technique still stays at the stage of 2.5G and disqualifying the transportation standards required by various graphs or images in bandwidth and stability. In addition, the cost of wireless connection is expensive at present. On the basis of researching on how to make fully use of the functions of portable devices and limited wireless network resources, the paper presents a method of accessing remote database by employing Agent technique and introduces the development and features of the technique. It summarizes the experience about Agent technique applied to GIS/LBS system. Finally, it design and implement a simple mobile agent system based on JADE-LEAP platform as the subject.