Short Packet Merging for URLLC Coding Gain
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Solution Overview
Problem
In URLLC scenarios, achieving a high coding gain is challenging due to short data packet lengths, leading to reliability issues in industrial control and unmanned driving applications.
Innovation Solution
Generating a longer data packet by padding or concatenating shorter packets, followed by channel coding, to enhance coding gain and reduce bit error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing coding schemes are used for short data packets in URLLC scenarios, then device complexity remains low, but coding gain is insufficient and reliability deteriorates
Solution Approach 1:
The patent merges multiple short data packets into a single longer data packet for channel coding. By combining several short packets (e.g., 4 packets of 20 bits each) into one long packet (80 bits), the system achieves higher coding gain from the extended code length while maintaining low device complexity. The merging process allows standard channel coding schemes to be applied more effectively to short packet scenarios.
2Reliability
If data packet length is increased to improve coding gain, then coding gain improves, but transmission time and latency increase
Solution Approach 1:
Multiple short data packets are merged into a single long packet that is then channel coded and transmitted together. This approach achieves high coding gain from the long packet length while the actual transmission time is reduced because multiple packets are sent in one transmission opportunity rather than sequentially. The merging happens in the data domain before transmission, not by extending the transmission duration.
Solution Approach 2:
The system employs periodic merging and transmission cycles where multiple short packets accumulated during a period are combined and transmitted together in a periodic fashion. This periodic action pattern allows the system to balance between achieving sufficient coding gain through merging and maintaining low latency by transmitting the merged packet periodically rather than waiting for excessive accumulation.
Data Source
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AI summary
Embodiments of the present invention disclose a data transmission method and a related device. The method includes: After determining a first data packet to be sent to a receive end, a transmit end may generate a second data packet based on the first data packet, encode the second data packet, and send an encoded second data packet, where a length of the second data packet is greater than a length of the first data packet. In the embodiments of the present invention, when sending a data packet to the receive end, the transmit end may generate a longer data packet from a shorter data packet through combination, and send the longer data packet to the receive end after channel coding. In this way, a relatively high channel coding gain can be obtained during data transmission, and a relatively high bit error rate of short packet transmission is avoided, so that data transmission reliability can be improved.