KEYWORDS: Satellites, Image processing, Personal digital assistants, Data processing, Telecommunications, Geography, Global Positioning System, Global system for mobile communications, Mobile communications, General packet radio service
This paper presents several key technologies in the Mobile Location Based Service (MLBS) system of Shanghai. In the paper, the author presents a solution of handset mobile terminal, PDA+GPS+GSM/GPRS. The paper particularly introduces the hardware of the terminal and the acquirement of GPS information at the terminal. The paper also
introduces how the terminal communicates with the special service center.