BeiDou Short Message Encoding via Text Labels Under 400 Bits
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Solution Overview
Problem
The existing BeiDou short message communication service is limited by a maximum 400-bit message capacity, with recipient information, position data, and user input content occupying significant space, restricting the amount of information that can be sent and degrading user experience.
Innovation Solution
A method that maps common text labels to preset codes occupying less character space, allowing users to input more content by selecting preconfigured or user-defined labels, and encoding the information for transmission via satellite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If users input text content directly in BeiDou short messages, then the message can convey information, but the message capacity is limited to 400 bits which restricts the amount of information that can be sent
Solution Approach 1:
The message content is segmented into two parts: fixed structured fields (recipient number, position information) and variable text content. The text content is further segmented into common text labels that can be mapped to compact codes, separating frequently used information from user-specific input.
Solution Approach 2:
Common text labels are pre-defined and stored in the terminal device. When users need to send common information, they select from these pre-stored labels rather than typing each time, effectively copying proven message templates that optimize space usage.
2Loss of information
If recipient number, position information, and user input content all occupy message capacity, then the message can be sent, but the user input content space is significantly reduced
Solution Approach 1:
Common text labels are pre-configured and stored in the terminal device before actual message sending. This preliminary preparation allows users to quickly select from pre-defined labels during message composition, reducing the time and space needed for user input while maintaining ease of operation.
Solution Approach 2:
The system changes the parameter representation of text content by mapping common text labels to compact codes. This parameter transformation reduces the character space required for common information while preserving the full meaning, effectively increasing the space available for user input content.
3Adaptability or versatility
If the message capacity is limited to 400 bits, then the satellite uplink communication rate limitation is respected, but the application scenarios are restricted and user experience is degraded
Solution Approach 1:
The system changes the encoding parameters of text content by mapping common text labels to compact codes. This parameter transformation reduces the average character space required for message content, allowing more information to be transmitted within the 400-bit limitation without requiring additional satellite communication resources.
Data Source
AI summary
The application provides example communication methods and systems, and example terminal devices without network service, in which more information content is allowed to be input in a short message. In one example method, in response to a first operation instruction on a first interface, the first terminal device displays a second interface including multiple text labels. In response to a selection operation for at least one text label in the multiple text labels, the first terminal device displays a third interface including message preview information obtained based on the at least one text label. In response to a second operation instruction on the third interface, the first terminal device sends information to a recipient based on the message preview information, and displays a fourth interface indicating an information interaction interface between the first terminal device and the recipient, where the information interaction interface is displayed after the information is sent.