###### Abstract  
The low coverage of public networks in pristine forest areas prevents on-site firefighters from communicating directly with remote command centers during forest fires, reducing firefighting efficiency. In this study, we designed a vehicle-mounted emergency communication system Using BeiDou RSMC (Regional Short Message Communication) for firefighting operations in forest areas without a public network to establish a satellite communication network and Zigbee self-organizing network technology to establish a local self-organizing network. Beidou RSMC is a satellite communication service developed and operated independently by China, and its signals now cover the entire globe. The combination of these two components ensures emergency communication in the event of a fire in a forest area without public network coverage. The performance of the system was tested by simulating a fire, and it was able to establish a reliable communication link between the firefighters on the scene and the remote command center in the absence of a public network. The proposed system solves the emergency communication problem that arises when a fire occurs in a forest area without a public network, enabling the remote command center to monitor fire information and dispatch various resources in real time, thereby improving firefighting efficiency and reducing casualties. forest fires; no public network; RSMC; Zigbee self-organizing network technology; emergency communication 20  
of forest fires globally [11]. China is also actively exploring and building an emergency communication system for fighting forest fires [11; 12]. Examples include the SatSee satellite fire watching system, provided by the Institute of Remote Sensing and Digital Earth of the Chinese Academy of Sciences [13]; the GEOVIS forest fire monitoring system, developed by CSTAR, based on the GEOVIS digital earth foundation platform [14]; and an integrated sky and earth forest fire monitoring system, provided by the Territorial Satellite Remote Sensing Application Center of the Ministry of Natural Resources. Each system utilizes different satellite remote sensing data and technical means to provide scientific methods and tools for early warning, monitoring, assessment, and management of forest fires [12; 14]. Experts and scholars from all over the world have also conducted studies on emergency communication in case of fire in ungazetted forest areas. [PERSON] et al. designed a fire mapping methodology that uses next-day active fire and thermal anomaly satellite retrievals to develop a high-resolution wildfire growth dataset, which led to important advances in fire behavior and fire weather research, as well as model development efforts, smoke modeling, and near-real-time fire monitoring [15]. [PERSON] et al. established a geostationary satellite system for 24 h monitoring of forest fires in the Korean Peninsula, with ground stations processing the data received from satellites to analyze the monitoring data [16]. [PERSON] et al. designed a new conceptual framework for disaster monitoring and proposed a viable disaster monitoring system that relies heavily on accessible satellite data [17]. [PERSON] et al. proposed four special requirements for satellite disaster monitoring: multi-band area, three-dimensional request, fixed angle request, and real-time download request [18]. [PERSON] et al. presented a methodology for GNSS radio-navigation field parameter monitoring and integrity assessment that uses a monitoring system that facilitates differential correction of satellites [19]. Several scholars in China began to discuss the application of remote sensing satellites a long time ago and provided ideas for satellite communications to be applied in forest fires [20]. [PERSON] et al.