RELAY DEVICE, COMMUNICATION SYSTEM, CONTROL METHOD, AND CONTROL PROGRAM

To implement stable communication.SOLUTION: A gateway device 100 comprises: a transmission control unit 140 that, on the basis of transmission control information 114, transmits data to a server 200 via a communication channel in which an upper limit is set for an uplink communication amount; a storage unit 110 that stores the transmission control information 114, resource information 113 including a valid period and the uplink communication amount/day, and history information 112; and a management control unit 150 that calculates an uplink remaining communication amount on the basis of the remaining valid period and the uplink communication amount/day, calculates a total reception amount on the basis of the history information 112, assigns a communication amount to each of terminal devices 300a to 300c on the basis of the uplink remaining communication amount when the total reception amount is larger than the uplink remaining communication amount, calculates a transmission period and a transmission amount/transmission on the basis of an assigned communication amount that is a communication amount assigned for each of the terminal devices 300a to 300c, and updates the transmission control information 114 to information including the transmission period and the transmission amount/transmission.SELECTED DRAWING: Figure 3 【課題】安定した通信を実現すること。【解決手段】ゲートウェイ装置１００は、送信制御情報１１４に基づいて、上り通信量に上限が設定されている通信回線を介して、データをサーバ２００に送信する送信制御部１４０と、送信制御情報１１４、有効期間と、上り通信量／日とを含むリソース情報１１３、及び履歴情報１１２を記憶する記憶部１１０と、残りの有効期間と、上り通信量／日とに基づいて、上り残通信量を算出し、履歴情報１１２に基づいて、総受信量を算出し、総受信量が上り残通信量よりも大きい場合、上り残通信量に基づいて、端末装置３００ａ～３００ｃのそれぞれに通信量を割当て、端末装置３００ａ～３００ｃのそれぞれに割当てた通信量である割当通信量に基づいて、送信周期と送信量／回とを算出し、送信周期と送信量／回とを含む情報に送信制御情報１１４を更新する管理制御部１５０と、を有する。【選択図】図３