Civil air defense emergency alert information message compression encoding method based on Beidou communication functions

Abstract

The invention provides a civil air defense emergency alert information message compression encoding method based on Beidou communication functions. The method comprises: a civil air defense common word code library is built; words included in the code library are expressed with corresponding codes and the codes are encapsulated into subframes; characters not included in the code library are expressed with corresponding computer codes; the computer codes and the subframes are connected according to the order of the original message to form a message text, and a message header and a message tail are added to the message text to form a to-be-sent message; it is determined if the length of the to-be-sent message is greater than the maximum length, L bytes, permitted by the Beidou system, and if so, the to-be-sent message is segmented into a plurality of sub-messages, the length of which is no greater than L bytes, for sending, each sub-message having a message header and a message tail; otherwise, the to-be-sent message is sent directly. The method can reduce the length of the message and the sending times of a long message. The alert information notifying time is shortened, and the flow is saved. The method is simple and easy to implement with good reliability.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for compressing and encoding civil air defense emergency warning information messages based on the Beidou communication function. Background technique [0002] In order to ensure civil air defense command and communication during wartime, carry out effective evacuation, and minimize casualties, emergency mobile command vehicles, mobile alarm vehicles, "communication in motion", "communication in static", maritime satellite phones, mobile short-wave and ultra-short-wave radio stations, etc. High-tech communication equipment has been applied to the civil air defense information communication system, but these equipments have problems such as small coverage, limited capacity, and slow response speed, making it difficult to ensure smooth communication with the civil air defense command center. [0003] At present, the civil air defense emergency alarm notification s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of civil air defense emergency warning information message compression coding method based on the Beidou short message communication function, to solve the situation that the civil air defense emergency warning notification system based on the Beidou short message communication function is interrupted in communication, broadcasting and television , the number of characters of the civil air defense emergency alarm message is limited by the length of the short message of the Beidou system

Images