COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION PROGRAM

• Main Authors: NAKATSU NAOHIRO, FUKUI KIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 03.08.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

To make it possible to perform transmission processing according to a transmission order while avoiding signal collision even when there is a slave station that does not receive information indicating granting of a transmission right in underwater communication.SOLUTION: The present invention is a communication device that performs underwater communication with a plurality of slave stations. The communication device includes: propagation time derivation means for deriving an underwater propagation time with each of the plurality of slave stations on the basis of position information on each of the plurality of slave stations; transmission order derivation means for deriving a transmission order to be assigned to a plurality of slave stations and a time to acquire a transmission right for each of the plurality of slave stations on the basis of, the underwater propagation time of each of the plurality of slave stations; transmission order information creating means for creating transmission order information including the transmission order among the plurality of slave stations and the time to acquire a transmission right for each of the plurality of slave stations; and communication means for transmitting the transmission order information to each of the plurality of slave stations.SELECTED DRAWING: Figure 1 【課題】水中通信で送信権の付与を示す情報を受信しない子局で存在するときでも、信号衝突を回避しながら送信順序に従った送信処理を行えるようにする。【解決手段】本発明は、複数の子局と水中通信を行なう通信装置において、複数の子局のそれぞれの位置情報に基づいて、複数の子局のそれぞれとの間の水中伝搬時間を導出する伝搬時間導出手段と、複数の子局のそれぞれの水中伝搬時間に基づいて、複数の子局に対して割り当てる送信順序と、複数の子局のそれぞれの送信権を得る時刻とを導出する送信順序導出手段と、複数の子局の間の送信順序と、複数の子局のそれぞれの送信権を得る時刻とを含む送信順序情報を作成する送信順序情報作成手段と、送信順序情報を、複数の子局のそれぞれに送信する通信手段とを備える。【選択図】 図１