Polar Sequence Extension With Nested Reordering for Larger 6G Payloads
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Solution Overview
Problem
Existing 5G NR polar codes are inadequate for handling larger payload sizes and varying channel conditions in 6G wireless communications, particularly in frequency range FR3 and with extra-large MIMO, requiring enhanced polar code constructions that maintain performance and manage computational and memory efficiency.
Innovation Solution
A hybrid online/offline method for generating polar reliability sequences, where a partial-order-based design extends the sequence on demand based on code block length, SNR, and other parameters, preserving the nesting property of the original sequence to support larger payloads while reducing memory overhead and computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing 5G NR polar codes are used, then current payload sizes are handled adequately, but larger payload sizes in 6G scenarios cannot be supported
Solution Approach 1:
The polar code construction is segmented into base sequences (defined in 5G NR) and extension sequences (added for larger payloads). The encoding process divides information bits into segments that fit within the base code capacity, with extension bits handling the remaining larger payload requirements. This segmentation allows support for both current and future 6G payload sizes without redesigning the entire code structure.
Solution Approach 2:
The patent implements nesting by embedding the 5G NR base polar code sequences within a larger extended polar code structure. The base sequences are nested as the core component, with extension sequences wrapped around them to accommodate larger payloads. This nested architecture maintains compatibility with existing 5G implementations while enabling 6G payload requirements.
2Adaptability or versatility
If polar code sequences are extended to support larger payloads, then payload capacity increases, but memory overhead increases
Solution Approach 1:
The patent pre-defines base polar sequences for common payload sizes in 5G NR specifications. These pre-computed base sequences are stored in memory and serve as the foundation for extended codes. When larger payloads are needed, extension sequences are generated on-demand by combining base sequences with additional bits, rather than storing all possible extended sequences. This preliminary preparation significantly reduces memory overhead while maintaining support for variable payload sizes.
3Adaptability or versatility
If polar code sequences are extended to support larger payloads, then payload capacity increases, but computational complexity increases
Solution Approach 1:
The patent applies partial extension by adding only the necessary extension bits beyond the base code length, rather than creating completely new codes for all payload sizes. The extension process uses partial reordering of bit channels based on reliability metrics, applying computational effort only to the extension portion. This partial action approach enables larger payload support while keeping computational complexity proportional to the extension amount rather than the total code length.
4Reliability
If bit-channel reordering is applied to maintain reliability, then link performance is maintained, but processing complexity increases
Solution Approach 1:
The patent applies reordering operations locally to specific portions of the bit channel sequence rather than the entire sequence. Localization areas are identified where reordering is most beneficial for maintaining reliability, and permutation matrices are applied only to these localized regions. This local quality approach maintains link performance in critical areas while minimizing processing complexity by avoiding global reordering of all bit channels.
Data Source
AI summary
Various aspects of the present disclosure relate to methods, apparatuses, and devices for wireless communication. A transmitting device may determine, based on a first polar sequence of a code having a first length and one or more code parameters, a second polar sequence of the code having a greater length. The transmitting device may further determine, in accordance with a nesting property of the first polar sequence and at least one of the code parameters, a reordering of extension sequence subchannels. The transmitting device may then encode information using the second polar sequence and transmit the encoded information.