| 摘要 |
<P>PROBLEM TO BE SOLVED: To evenly guarantee transmission quality of all terminals at a low cost without remarkably changing a configuration with respect to a line design supporting apparatus for specifying a proper transmission system to be applied to a radio transmission path, and a radio device equivalent to a radio base station or a terminal into which the line design supporting apparatus is incorporated, in the radio transmission system in which transmission service is provided to the terminal via the radio transmission path. <P>SOLUTION: The system is configured so as to be provided with a margin calculating means for obtaining a system margin of the radio transmission path and a required rainfall margin on the basis of a station establishing condition of both or any one of a radio station and an own station which face each other via the radio transmission path; and a transmission system selecting means for selecting a transmission system in which the deterioration of transmission quality generated in the radio transmission path is reduced, or compensated on the basis of the difference between the system margin and the required rainfall margin, as a transmission system of the radio transmission path. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
