ALARM SYSTEM, ALARM DEVICE, COMMUNICATION METHOD, PROGRAM

• Main Authors: OHASHI TETSUYA, YOSHIDA SHO, HARADA KENJI, HARA YUTA
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; WIRELESS COMMUNICATIONS NETWORKS

To provide a technique capable of switching a relay route smoothly in a multi-hop network.SOLUTION: A fifth fire alarm device 600e receives a signal from a relay device 700 via a third fire alarm device 600c. The fifth fire alarm device 600e is configured so as to, when reception of a signal from the relay device 700 via the third fire alarm device 600c has failed, receive the signal from the relay device 700 via a first fire alarm device 600a. The fifth fire alarm device 600e is also configured so as to, when having switched the relay route that includes the third fire alarm device 600c to the relay route that includes the first fire alarm device 600a, transmit a route switching notification to notify the relay route switching to the relay device 700 to the first fire alarm device 600a.SELECTED DRAWING: Figure 1 【課題】マルチホップネットワークにおいて中継ルートをスムーズに切りかえる技術を提供する。【解決手段】第５火災警報器６００ｅは、第３火災警報器６００ｃを介して中継装置７００からの信号を受信する。第５火災警報器６００ｅは、第３火災警報器６００ｃを介した中継装置７００からの信号の受信に失敗した場合、第１火災警報器６００ａを介して中継装置７００からの信号を受信する。第５火災警報器６００ｅは、第３火災警報器６００ｃを含む中継ルートを、第１火災警報器６００ａを含む中継ルートに切りかえた場合、中継ルートの切替を中継装置７００に知らせるためのルート切替通知を第１火災警報器６００ａに送信する。【選択図】図１