After a strong earthquake occurs, the communication network facilities in the disaster-stricken area are often damaged. Therefore, quickly establishing an effective and wide-ranging emergency communication network to promptly transmit disaster information is of great significance for the on-site organization of disaster relief and command and dispatch of rescue operations. Wireless networks have technical characteristics such as simple networking and fast deployment, as well as low costs. They are suitable as the network platform for on-site emergency communication. The emergency plan proposed by our company is an emergency communication method for earthquake sites based on wireless Mesh network technology. It can quickly establish a wireless local area network on the disaster site, thereby achieving information transmission and sharing. The entire system has a fast networking speed and good robustness, and through satellite communication technology, the local area networks can be combined to form a wide area network in the disaster area and further connected to the Internet. This method can meet the basic requirements for emergency communication information transmission at the earthquake site.

Strong earthquakes often cause damage or even destruction to the basic communication facilities, resulting in the interruption of external communication in the disaster-stricken area and creating an information isolation zone. This, in turn, poses significant difficulties for emergency rescue efforts. Therefore, at the earthquake site, it is necessary to quickly and effectively establish a large-scale temporary emergency communication network to achieve real-time transmission and reporting of disaster information, thereby providing strong support for organizing relief efforts, assisting in decision-making, and coordinating operations, in order to minimize disaster losses and maintain social stability to the greatest extent.

This special emergency communication network not only needs to meet the requirements of suddenness in time, uncertainty in location, urgency in business, and diversity in information, but also must possess the characteristics of rapid deployment, easy installation, good robustness, strong scalability, and reasonable cost, to ensure the provision of reliable information transmission services. In recent years, earthquakes of magnitudes 8.0 in Wenchuan, 7.1 in Yushu, and 7.0 in Ya'an have occurred successively and have had a significant impact. The demand for emergency communication has become even more urgent.

Our company has recently launched a new wireless MESH self-organizing network device, which adopts a mesh topology structure and is a self-organizing network without a central point. It has the advantages of simple network establishment, strong mobility, and low cost. According to the specific usage scenarios on site, there are various appearance structures such as handheld, backpack, vehicle-mounted, and airborne types. The transmission distance ranges from several hundred meters to tens of kilometers. It is fully IP-based, flexible in installation and use, and convenient for operation and maintenance. It can provide multiple frequency band customization, expand WIFI, GPS, 3G/4G functions, and support integrated communication needs. It can be flexibly applied to military communication dedicated networks, public security dedicated networks, emergency communication dedicated networks, industry information dedicated networks, regional broadband dedicated networks, wireless monitoring dedicated networks, collaborative management dedicated networks, and intelligent transmission dedicated networks, etc. It provides stable, reliable, and timely high-definition video, multi-channel data, clear voice, and visualized command and dispatch services for military communication, counter-terrorism and emergency response, police law enforcement, security activities, rescue operations, fire command, forest fire prevention and monitoring, forest area monitoring, civil defense / earthquake, power inspection, digital oilfield, unmanned aircraft groups, fleet intercommunication, ship formation, maritime communication, airport ground support, subway emergency, highway construction, hydrological monitoring, mobile capture and broadcasting, medical care, and other fields.