Beidou short message communication is a special service of Beidou navigation satellite System, which plays an important role in the field of emergency communication。The following are some applications and advantages of Beidou short message communication in emergency communication:

　　1. Wide coverage: The Beidou-3 short message communication service covers China and neighboring countries and regions, and can effectively supplement the ground mobile communication network, especially in the area without ground network coverage to provide emergency communication services。

　　Low cost and high reliability: Beidou short message communication has the characteristics of low cost, wide coverage and high reliability, which is suitable for emergency communication, search and rescue services in economic and social development。

　　Third, two-way communication capability: the Beidou system can not only carry out high-precision positioning, speed measurement and timing, but also send short messages through two-way communication between the user's computer and the satellite, which is especially suitable for emergency search and rescue and maritime communications。

　　4. Advantages in the field of emergency search and rescue: BDS-3 has global short message communication services and global search and rescue services, enhancing the advantages of BDS-3 in the field of emergency search and rescue。

　　5. Handling of false alarm: If a false alarm occurs, a description of the false alarm can be sent to the rescue coordination center through a short message to avoid unnecessary search and rescue operations。

　　6. Distress alarm business record: The coast station is responsible for recording the whole process of distress communication, and the Beidou equipment can save the received messages for subsequent review and analysis。

　　Support a variety of data types of transmission: The Beidou-3 short message system supports a variety of data types of transmission, including voice, image, etc., to provide users with more abundant communication services。

　　8, communication frequency and message length: Beidou-3 short message communication service has been upgraded and expanded, the maximum length of a single short message is 14,000 bits, equivalent to about 1,000 Chinese characters, and the communication success rate is high。

　　9, industry emergency communication products: suitable for border and coastal defense, emergency rescue, geological survey scenes, support Beidou No. 3 area short message, with short message voice broadcast function。

　　Emergency wireless communication applications: In the case of mobile communication interruption or power interruption in disaster areas, Beidou short messages can be used for communication and positioning, etc., which is suitable for emergency rescue, field operations, and Marine operations。

　　Because of its unique advantages, Beidou short message communication service plays an increasingly important role in the field of emergency communication, especially in the case of traditional communication infrastructure can not be covered or destroyed, and provides an effective guarantee for rescue work。