| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption at a mobile body and to increase the number of satellite lines by mutually reporting control information through a common control line between a fixed station and a mobile station and allocating an idle satellite line from the fixed station to a requesting station or receiving the position information of the mobile station so as to map it onto the effective radiation power (EIRP) contour of the satellite. SOLUTION: Mobile stations 3 and 6 detect their own positions through GPS receivers at the time of installation, report them from transmission/reception parts through a satellite 1 to a fixed station 2 and manually set transmission power values. At the fixed station 2, the movement information of all the mobile stations under expansion in a position information storage part is mapped together with the EIRP contour of the satellite. Afterwards, when a call is originated from any mobile station to the mobile station 6, the connection is requested through the common line to the fixed station 2, and any satellite line is allocated by a fixed station control part. Besides, a power correction amount is calculated by the control part, transmission power control signals are sent from the fixed station 2 to the mobile stations 3 and 6, and communication between mobile stations is performed while changing transmission power at the mobile stations. |
