OPTICAL SPACE COMMUNICATION SYSTEM, COMMUNICATION STATION, AND ITS CONTROL METHOD

• Main Authors: YANAGIDA YOSHIO, AOKI KAZUHIKO, NISHIMURA SO
• Format: Patent
• Language: English; Japanese
• Published: 20.11.2014
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PROBLEM TO BE SOLVED: To increase a possibility that an optical antenna of a mobile station and an optical antenna of a fixed station that perform optical space communication are in a state of nearly facing each other even if the travel route of the mobile station is undefined.SOLUTION: An optical space communication system of the invention is made up of a fixed station and a mobile station. The mobile station includes: a first communication unit comprising a first optical antenna capable of adjusting its orientation direction; a second communication unit for transmitting information to the fixed station; and a mobile station control unit that determines the orientation direction of the first optical antenna on the basis of stored position information on the fixed station and a detected position of the mobile station, adjusts the orientation direction of the first optical antenna to the determined direction, and makes the second communication unit transmit mobile station information indicating the position of the mobile station to the fixed station. The fixed station includes: a third communication unit comprising a second optical antenna capable of adjusting its orientation direction; a fourth communication unit for receiving the mobile station information; and a fixed station control unit that determines the orientation direction of the second optical antenna on the basis of the mobile station information, and adjusts the orientation direction of the second optical antenna to the determined direction. 【課題】移動局の移動航路が不定の場合にも、光空間通信を行う移動局の光アンテナと固定局の光アンテナとが略対向状態となる可能性を高める。【解決手段】本発明の光空間通信システムは、固定局と移動局とからなり、移動局は、指向方向が調整可能な第１の光アンテナを備えた第１の通信部と、固定局に情報を送信する第２の通信部と、記憶している固定局の位置情報と検出した移動局の位置とに基づいて第１の光アンテナの指向方向を決定し、決定した方向に第１の光アンテナの指向方向を調整するとともに、移動局の位置を示す移動局情報を第２の通信部に固定局へ送信させる移動局制御部と、を有し、固定局は、指向方向が調整可能な第２の光アンテナを備えた第３の通信部と、移動局情報を受信する第４の通信部と、移動局情報に基づいて第２の光アンテナの指向方向を決定し、決定した方向に第２の光アンテナの指向方向を調整する固定局制御部と、を有する。【選択図】図１