| 摘要 |
PURPOSE:To attain effective utilization of a frequency and to simplify a slave station device by using the communication system of scanning beam and assigning the operating frequency upon request without using an exclusive control channel. CONSTITUTION:When a master station 10 constitutes correspondence with plural slave statios 21a... existing in regions obtained by dividing the range of an angle H into 5, an antenna 11 of the master station 10 consisting of the electronic scanning antenna 11, a master station radio equipment 12 and a digital terminal station device 13 is switched with a phase shifter group operated electronically in high speed so that the antenna beam 15 of width theta in five directions. The equipment 12 adops plural transmission/reception frequencies in pair with each other and the line is constituted by the request assignment system with slave stations in each region by means of the time division multiple address connection. |
