Joint Error Correction Coding for Unequal Wireless Payload Protection
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Solution Overview
Problem
Current wireless communication systems fail to incorporate mechanisms for unequal error protection at the air interface, leading to inefficient error correction and latency management for diverse payloads with varying priority levels in 6G networks.
Innovation Solution
A joint coding scheme is implemented where high-priority and low-priority payloads are combined into a single longer codeword, utilizing error correction codes like Polar and LDPC codes, with prioritization based on bit positions and variable node degrees to provide differential error protection and latency management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate encoding is used for high-priority and low-priority payloads, then differential error protection can be provided, but overall coding gain is reduced due to shorter code lengths
Solution Approach 1:
The patent combines multiple payloads of different priorities into a single joint codeword, merging separate encoding operations into one unified encoding process. This allows the system to achieve longer code lengths and higher coding gain while still providing differential protection through strategic bit position allocation within the joint codeword.
2Reliability
If longer codewords are used to improve coding gain, then error correction performance improves, but decoding latency increases
Solution Approach 1:
The patent applies local quality by assigning different error protection levels to different bit positions within the joint codeword. High-priority payloads are placed in bit positions with stronger error protection characteristics, allowing the decoder to potentially terminate early once these critical bits are decoded, reducing overall latency despite the longer codeword length.
3Device complexity
If uniform error protection is applied to all payloads, then encoding complexity is reduced, but QoS requirements for different priority payloads cannot be met
Solution Approach 1:
The patent implements local quality by providing non-uniform error protection across different payloads within the same joint codeword. Through strategic allocation of bit positions and use of code freezing techniques, the system achieves differential QoS protection without requiring separate encoding schemes for each priority level, thus maintaining relatively simple encoding complexity while meeting diverse QoS requirements.
Data Source
AI summary
Systems and methods are provided that deliver unequal error protection for multiple payloads in a single forward error correction codeword at the air interface layer of wireless communication networks. To simultaneously solve the two problems of (i) providing differential treatment for high and low priority payloads (e.g. higher QoS for payload with higher priority), and (ii) enhancing the overall coding gain, a joint coding scheme is provided in which a high-priority payload is combined with a low priority payload, and a combined payload is jointly encoded to generate a single long codeword. For example, one or more small URLLC messages (e.g. from sensors) can be combined with a video payload or an eMBB payload.