TERMINAL DEVICE, SERVER, SYSTEM, AND PROGRAM

To provide a technique capable of minimizing an increase in battery consumption and avoiding a situation in which a user cannot acquire location information with high accuracy for a long period.SOLUTION: A terminal device (100) comprises a detection processing unit (142) and a transmission processing unit (144). The detection processing unit exists in a range in which it can perform radio communication with the terminal device (100) and detects a radio signal source transmitting identification information. The transmission processing unit transmits detection result information containing the processing results of a plurality of times of detection processing performed by the detection processing unit (142) to a server (200) which estimates location information of the terminal device (100) on the basis of the detection result information.SELECTED DRAWING: Figure 2 【課題】電池消費の増大を最小限に抑えつつ、ユーザが長い期間精度の高い位置情報を取得できない状況を避けることのできる技術を提供する。【解決手段】端末装置（１００）は、端末装置（１００）と無線通信可能な範囲に存在し、識別情報を送信する無線信号源を検出する検出処理を行う検出処理部（１４２）と、検出処理部（１４２）が検出処理を複数回行った結果を含む検出結果情報を、当該検出結果情報に基づいて端末装置（１００）の位置情報を推定するサーバ（２００）に送信する送信処理部（１４４）と、を備えている。【選択図】図２