| 摘要 |
PURPOSE:To collect a data of inter-mobile stations in on-line by using a laser beam between the mobile stations and using a radio wave for a central station ary station. CONSTITUTION:Digital code transmission reception by a laser beam is applied among mobile stations A1-An and B1-Bn with in an optical distance. A central stationary station X1 is placed at a location ensuring a radio line to decentralized entire mobile stations. When the central station X1 collects informa tion by a simultaneous call system through a radio line and sends an initial setting data to the mobile stations A1-An, each mobile station is in the standby state according to a prescribed format and sets the absolute time at start at the same time. When a call code is received, each mobile station sends informa tion to the central station X1 according to a prescribed order. Thus, the informa tion exchange is attained in on-line without giving effect mutually through the utilization of a laser beam and a radio frequency. |
