DETERMINATION DEVICE, DETERMINATION METHOD, AND DETERMINATION SYSTEM

To determine the position of a target device with higher accuracy.SOLUTION: A determination device is provided that includes a determination unit that determines an area where a portable apparatus is located, based on wireless communication between each of a plurality of first wireless communication devices placed at different positions from each other in a target space in which a plurality of areas are defined and a second wireless communication device mounted on the portable apparatus, in accordance with a prescribed communication standard. The determination unit determines the area where the portable apparatus is located using a determination formula that differs depending on the area to be determined and the first wireless communication device that has successfully calculated the RSSI of a signal received from the second wireless communication device in the wireless communication in accordance with the prescribed communication standard.SELECTED DRAWING: Figure 7 【課題】対象装置の位置をより精度高く判定する。【解決手段】複数のエリアが定義された対象空間において互いに異なる位置に配置される複数の第１の無線通信装置の各々とポータブル機器に搭載される第２の無線通信装置との間における規定の通信規格に準拠した無線通信に基づいて、前記ポータブル機器が位置するエリアを判定する判定部、を備え、前記判定部は、判定の対象となるエリアおよび前記規定の通信規格に準拠した無線通信において前記第２の無線通信装置から受信した信号のＲＳＳＩの算出に成功した前記第１の無線通信装置に応じて異なる判定式を用いて前記ポータブル機器が位置するエリアを判定する、判定装置が提供される。【選択図】図７