CRC Layout for Common and Private Transport Blocks in Rate Splitting
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Solution Overview
Problem
Wireless communication systems face challenges in accurately transmitting and decoding messages with rate splitting transmissions due to the lack of CRC parity bit computation and attachment procedures, leading to reduced accuracy and increased errors.
Innovation Solution
A method for generating and attaching CRC parity bits to code blocks and transport blocks associated with common and private portions of messages in rate splitting transmissions, using specific polynomials for error detection and correction, and transmitting these bits alongside the messages to ensure accurate decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rate splitting transmissions are performed without CRC parity bit computation and attachment, then device complexity is reduced and transmission speed is improved, but error detectability deteriorates and message accuracy is reduced
Solution Approach 1:
The patent segments the message into common and private portions, and further divides CRC generation into separate procedures for common transport blocks and private transport blocks. This segmentation allows parallel processing of CRC bits for different message portions, improving transmission speed while maintaining comprehensive error detection coverage for the entire message.
Solution Approach 2:
The patent performs preliminary action by generating and attaching CRC parity bits to transport blocks before transmission. The common CRC bits are generated based on the common portion, and private CRC bits are generated based on the private portion, ensuring error detection capability is established in advance before the actual data transmission occurs.
2Measurement precision
If CRC parity bits are generated and attached to each transport block, then error detection accuracy is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent merges the CRC generation process by utilizing the common portion of the message to generate common CRC bits that apply to both common and private transport blocks. This merging approach reduces redundant computations and processing complexity while maintaining accurate error detection for the entire message through the combined use of common and private CRC bits.
Solution Approach 2:
The common CRC bits serve a universal function by being applicable to both common and private transport blocks. This multi-functionality reduces the total number of CRC operations needed, as the same common CRC bits can verify errors in multiple different transport blocks, thereby reducing processing complexity while maintaining comprehensive error detection.
3Productivity
If common portions from multiple messages are combined into a single common transport block, then transmission efficiency is improved, but error detection complexity increases
Solution Approach 1:
The patent segments the error detection process into distinct common CRC generation and private CRC generation stages. By segmenting the CRC generation complexity into these separate, well-defined stages, the system can efficiently combine common portions from multiple messages into a single common transport block while managing the complexity through structured, modular processing steps.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A device may perform rate splitting on a first message for a first user equipment (UE) and a second message for a second UE, the first message comprising a first private portion and a first common portion, and the second message comprising a second private portion and a second common portion. The device may combine the first common portion and the second common portion into a third common portion. The device may generate cyclic redundancy check (CRC) parity bits associated with at least one of the first private portion and the third common portion and attach the generated CRC parity bits to one or more blocks associated with the transmission. The device may transmit the first private portion and the third common portion to the first UE, and the second private portion and the third common portion to the second UE.