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Satellite short message and information cooperative transmission method

A technology of cooperative transmission and short messages, applied in the field of communication, can solve the problems of low efficiency, achieve the effect of increasing hiding capacity, increasing information hiding capacity, and avoiding uncertainty

Active Publication Date: 2019-10-11
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

The efficiency is relatively low; in addition, if the short message channel is occupied, if it is possible to embed some secret information or sensitive information in the short message of Chinese characters without increasing the amount of data, there must be a very good application occasion

Method used

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  • Satellite short message and information cooperative transmission method

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Embodiment Construction

[0050] (1) First preprocess the character range:

[0051]Adjust the range of GB2312 national standard Chinese characters to high byte H and low byte L, and adjust the range of H from 0-8 and 15-86 to 0-80 in order, the method is as follows:

[0052] ·If H is between 0-8, H will not change;

[0053] · If H is between 15-86, then H=H-6;

[0054] After preprocessing, each character A can be uniquely expressed as (H, L), where H ranges from 0-80 and L ranges from 0-93;

[0055] (2) Encoding the character A to obtain A1, which can be expressed as (H1, L1), the steps are as follows:

[0056] If the high byte H is between 0-80 and the low byte L is between 0-63, then H and L are unchanged, that is, H1=H, L1=L; A is coded as (H1, L1), equal to (H , L), wherein H1 is between 0-80, and L1 is between 0-63;

[0057] ·If the high byte H is between 0-63 and the low byte L is between 64-93, then H1=L+17, L1=H; A is coded as (H1,L1), where H1 is between 81-110, L1 is between 0-63;

[00...

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Abstract

According to a satellite short message and information cooperative transmission method provided by the invention, information hiding processing is carried out in a navigation short message, and cooperative transmission of information and the short message is carried out by utilizing the characteristics of short message data. The method is applied to the framework of the national Chinese charactercoding standard GB2312. Through information preprocessing and encoding and decoding methods, the 3 / 16 lossless information hiding and embedding rate is realized, nearly 20% of characters can be hiddenand transmitted in any standard character by utilizing a short message transmission channel on the basis of not increasing the transmission data volume, the hidden character information and the original short message can be recovered in a lossless manner, and the security and confidentiality are realized. According to the method, the practicability of a satellite short message system is expanded,the application range of satellite communication and navigation satellite systems in China is expanded, and new value-added short message information service can be provided for millions and tens ofmillions of users.

Description

technical field [0001] The invention relates to a data transmission method, in particular to a satellite short message and information cooperative transmission method, which belongs to the communication field. Background technique [0002] With the development of science and technology, people have more and more demands for various information, among which short message (short message) is a kind of commonly used information, and there are more and more transmission means of short message. [0003] Satellite navigation is a method to accurately determine the position and time of any point on the earth through the Global Navigation Satellite System (GNSS). There are currently four major satellite navigation systems in the world, namely the GPS system of the United States, the GLONASS system of Russia, the Galileo system of Europe and the Beidou satellite navigation system of China. Only China's Beidou satellite navigation system has the short message function and can transmit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/14H04L1/00
CPCH04L1/0014H04W4/14
Inventor 周诠张怡呼延烺刘娟妮冯新岗李小军黎军魏佳圆梁薇
Owner XIAN INSTITUE OF SPACE RADIO TECH
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