Data Collection and Transmission Technology for Emergency Environment Monitoring Based on Integration of LoRa and BDS

  Objectives  The existed problems of post-disaster rapid emergency response system include the short communication distance between nodes in conventional wireless sensor networks, and the over-reliance on ground stations for front-end and back-end long-distance communication.

  Methods  The emergency environment monitoring system based on long range wireless transmission technology and BeiDou navigation satellite system (BDS) is designed and developed. The proposed system takes unmanned aerial vehicle as bearing platform of emergency devices, and the collected environmental parameters are transferred through the relay nodes to the gateway nodes equipped with BDS modules. Users can use the hand-held emergency terminal to acquire and receive the collected environmental monitoring data in real time.

  Results  The results show that the proposed system can realize real-time data collection and reliable transmission in different environments with the communication distance of 8 km. The packet loss rates of short message in urban area and in mountainous area are 7.450% and 18.395%, respectively.

  Conclusions  The proposed system has certain application value for complete or partial absence of conventional communication network.