Polar Bit Sub-Block Interleaving for 5G Control Channels
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Solution Overview
Problem
Existing coding schemes and processing mechanisms for transmission of control information and data in 5G mobile wireless communication systems are inadequate for achieving optimal performance in extreme Mobile Broadband, Ultra High Reliability and Low Latency Communications, and massive Machine Type Communications.
Innovation Solution
The system employs polar encoding and sub-block wise interleaving to enhance rate matching, where polar encoded bits are divided into sub-blocks and interleaved using a specific interleaver pattern, allowing for efficient bit selection and transmission based on a rate matching scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing coding schemes are used for transmission of control information and data, then the system maintains basic functionality, but the block error ratio performance is insufficient for 5G use cases
Solution Approach 1:
The polar encoded bits are divided into multiple sub-blocks of equal size, where each sub-block is then interleaved independently using a specific interleaver pattern. This segmentation allows the system to achieve better error performance by distributing errors across different sub-blocks while maintaining manageable complexity through standardized processing of each segment.
2Productivity
If polar encoding with sub-block wise interleaving is implemented, then the transmission efficiency is improved, but the processing complexity increases
Solution Approach 1:
The system performs preliminary polar encoding to generate the coded bit sequence before applying sub-block wise interleaving. By pre-organizing the bits into sub-blocks and preparing the interleaver pattern in advance, the system optimizes the subsequent transmission process and achieves better throughput without excessive real-time processing complexity.
3Adaptability or versatility
If rate matching scheme is applied for bit selection, then the transmission adaptability is enhanced, but the processing time increases
Solution Approach 1:
The rate matching scheme adjusts the code rate by selectively transmitting bits from the interleaved sub-blocks based on channel conditions and traffic requirements. By changing the transmission parameters (which bits to transmit, how many to repeat or puncture) without fundamentally altering the encoding structure, the system achieves adaptability while keeping processing time manageable.
Data Source
AI summary
Systems, methods, and instrumentalities are disclosed for interleaving coded bits. A wireless transmit/receive unit (WTRU) may generate a plurality of polar encoded bits using polar encoding. The WTRU may divide the plurality of polar encoded bits into sub-blocks of equal size in a sequential manner. The WTRU may apply sub-block wise interleaving to the sub-blocks using an interleaver pattern. The sub-blocks associated with a subset of the sub-blocks may be interleaved, and sub-blocks associated with another subset of the sub-blocks may not be interleaved. The sub-block wise interleaving may include applying interleaving across the sub-blocks without interleaving bits associated with each of the sub-blocks. The WTRU may concatenate bits from each of the interleaved sub-blocks to generate interleaved bits, and store the interleaved bits associated with the interleaved sub-blocks in a circular buffer. The WTRU may select a plurality of bits for transmission from the interleaved bits.