The Design And Implementation Of Emergency Rescue Communication System Based On Wireless Mesh Network

In recent years,various types of natural disasters or emergencies are commonall over the world,such as earthquake,landslides and fire accidents.These accidents canoften lead to the interruptions of normal communication.As we all know,only by keeping the communication unblocked,can we provide rescue for accidents at the first time to reduce losses,which shows the importance of emergency rescue communication system.This paper designs an emergency rescue communication system based on wireless Mesh network.The system can quickly form a network between a fixed station(command center)and a single soldier terminal.The functions of voice intercommunication,video sharing,text command and electronic map can be realized on the established network.The main work of this paper focuses on the following aspects:(1)The function and performance requirements of the whole emergency rescue communication system are analyzed,and the overall scheme design of the emergency rescue communication system based on wireless Mesh network is completed.The hardware platform uses mobile communication equipment to build a wireless Mesh network,and the system software includes command and dispatch software and handheld terminal software.(2)The wireless Mesh network equipment is used to build the hardware platform.The handheld terminal software of the system uses the existing Web RTC SDK to construct the Web RTC Android application program,the command and dispatch software uses Node.js as development platform,Express as the Web development framework,and EJS template engine as the rendering environment of the system.The two softwares establish a persistent peer-to-peer connection through the messages forwarded by the Web Socket signaling server,and use the new open source Web RTC technology to realize the functions of voice intercom,video sharing,text command,electronic map and so on.(3)The emergency rescue communication system based on wireless Mesh network is tested and analyzed from two aspects of system function and system performance.After testing,the system can run safely,stably and efficiently,and the audio and video pictures are clear and smooth,meeting the anticipated design requirements.The research content of emergency rescue communication system based on wireless Mesh network designed in this paper comes from the engineering application project of China Institute of Electronic Science and Technology,which has certain application value and broad market application prospect.