ON-VEHICLE DEVICE, GROUND DEVICE AND WIRELESS COMMUNICATION METHOD

• Main Author: NABEYA TOSHIHISA
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSMISSION; TRANSPORTING; VEHICLES IN GENERAL; WIRELESS COMMUNICATIONS NETWORKS

To improve robustness to an error in radio communication which is performed between an on-vehicle device and a ground device.SOLUTION: An on-vehicle device is mounted on a vehicle, and comprises at least one directional variable antenna, a calculation part, a control part, and a vehicle radio part. The calculation part acquires a travel position of the vehicle. The control part determines an antenna pattern of the directional variable antenna on the basis of an installation position of a ground device as a communication object and the acquired travel position. The vehicle radio part transmits vehicle information including the travel position via the directional variable antenna to which the determined antenna pattern has been set, or receives vehicle control information from the ground device.SELECTED DRAWING: Figure 1 【課題】車上装置と地上装置との間で行われる無線通信の誤りに対するロバスト性を高める。【解決手段】本発明の実施形態としての車上装置は、車両に搭載される車上装置であって、少なくとも１つの指向性可変アンテナと、演算部と、制御部と、車両無線部とを備える。前記演算部は、前記車両の走行位置を取得する。前記制御部は、通信対象となる地上装置の設置位置と、取得した前記走行位置とに基づき、前記指向性可変アンテナのアンテナパターンを決定する。前記車両無線部は、前記決定されたアンテナパターンを設定した前記指向性可変アンテナを介して、前記走行位置を含む車両情報を送信する、又は前記地上装置から車両制御情報を受信する。【選択図】図１