Polar Coding With Transmission Diversity for URLLC Outages
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Solution Overview
Problem
Conventional error correction methods, such as ARQ and HARQ, are not compatible with the low latency requirements of Ultra Reliable Low Latency Communications (URLLC) over wireless channels prone to fading and interference, necessitating a need for error correction coding integrated with transmission diversity to ensure extreme reliability without retransmissions.
Innovation Solution
The integration of error correction coding with transmission diversity using a diversity transform and polar codes, incorporating redundancy and algebraic constructions optimized for channel outage scenarios, avoids interleaving and uses strictly rectangular diversity transform matrices to shield against extreme channel outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional error correction methods (ARQ and HARQ) are used, then error correction capability is improved, but latency increases due to retransmissions
Solution Approach 1:
The patent applies preliminary action by pre-encoding data with error correction codes and mapping encoded bits to multiple diverse channels before transmission. This prepares redundant information in advance across multiple channels, allowing the receiver to reconstruct data without retransmissions even when some channels experience outages, thus achieving low-latency URLLC.
2Reliability
If transmission diversity is integrated with error correction coding, then reliability under channel outage is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the encoded bit sequence into multiple segments and mapping each segment to different transmission channels. This segmentation approach distributes information across multiple channels, enabling the system to tolerate channel outages while maintaining manageable complexity at both transmitter and receiver through structured segment-based processing.
Solution Approach 2:
The patent applies universality by designing a unified error correction coding framework that simultaneously provides error correction and transmission diversity functions. The same coding structure serves multiple purposes: protecting against errors within channels and against complete channel outages, reducing the need for separate diversity mechanisms and simplifying overall system complexity.
3Productivity
If polar codes are used for error correction, then coding efficiency is improved, but performance in fading channels deteriorates without diversity
Solution Approach 1:
The patent applies dimensionality change by extending polar codes from single-channel transmission to multi-channel transmission diversity. By mapping encoded bits across multiple independent channels, the system adds a spatial dimension to the error protection, transforming polar codes into a multi-dimensional error correction scheme that maintains high coding efficiency while achieving robustness against channel fading and outages.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure discloses a method and an apparatus for error correction coding in a communication system, more specifically, to error correction coding integrated with transmission diversity.