TERMINAL POSITION REPORTING SYSTEM

PROBLEM TO BE SOLVED: To obtain a terminal position reporting system which displays the newest position information of a terminal station existing in a radio communication network by a small lag time including terminal stations which exist out of a radio wave attainment range of a central office. SOLUTION: The central office 2 and a plurality of terminal stations 3 compose a communication group of multicasting in a radio communication network, the respective terminal stations 3 send position reporting messages to the central office 2. At this time, each terminal station 3 distinguishes existence of the terminal station 3 which is possible to repeat based on difference of registered terminal station names in a terminal list in an own region 35 and a terminal list in the central office region 36, edits a position reporting message for repeating, and periodically carries out multicasting transmission in a predetermined time interval. The central office 3 graphically displays a position of each terminal station 3 and radio wave status based on the position reporting message from the terminal station. COPYRIGHT: (C)2006,JPO&NCIPI