BeiDou Satellite Message IDs Using Timestamps to Save Packet Space
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Solution Overview
Problem
The existing BeiDou satellite communication system has limitations in message capacity, with a maximum of 400 bits per message, which restricts the amount of information that can be transmitted, including recipient number, location information, and user-entered content, due to the large occupation of space by the message identifier.
Innovation Solution
Generate a unique identifier for BeiDou satellite messages based on timestamp information, using modulo processing to reduce the message capacity occupation, allowing association of multiple messages through the identifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a general message identifier is used in BeiDou satellite messages, then message association capability is improved, but message capacity occupation increases
Solution Approach 1:
The patent changes the parameter of message identifier from a general format to a timestamp-based format. By using timestamp information as the basis for generating the message identifier, the system reduces the number of bits required to represent the identifier while maintaining its ability to associate related messages. This parameter change directly addresses the contradiction by optimizing the balance between identification capability and space consumption.
2Quantity of substance
If message capacity is increased to accommodate more information, then information content capability is improved, but satellite communication rate limitation is worsened
Solution Approach 1:
The patent applies partial action by implementing compression only for the message identifier portion of the message, rather than compressing the entire message content. This selective compression approach allows the system to free up message capacity without requiring complex compression algorithms that would consume additional communication resources. The partial application of compression directly addresses the rate limitation while still achieving the goal of increased information capacity.
3Quantity of substance
If message identifier length is reduced to save space, then message capacity efficiency is improved, but identifier uniqueness reliability is worsened
Solution Approach 1:
The patent introduces timestamp information as an intermediary element that mediates between the need for short identifiers and the requirement for uniqueness. The timestamp serves as a reliable temporal reference that, when combined with other message parameters, generates a unique identifier without requiring a large number of bits. This intermediary approach ensures identifier uniqueness while maintaining space efficiency.
Data Source
AI summary
This application provide a satellite message transmission method, a system, and a terminal device, so that an identifier of a satellite message may be indicated in the satellite message, and occupation of space may be reduced. The identifier of the satellite message may facilitate association of relationships among a plurality of messages. In the method, a first terminal device generates an identifier of a satellite message based on timestamp information in response to an operation indicating to send the satellite message, and then sends the identifier of the satellite message together with message content of the satellite message. Compared with generating the identifier of the satellite message by using a general technology, generating the identifier of the satellite message based on the timestamp information may occupy less space.