Control Information Coding with Priority-Based CRC Protection
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Solution Overview
Problem
In 5G new radio (NR) systems, unreliable acquisition of control information impacts performance, data rate, latency, and MIMO operations, particularly affecting scheduling, link adaptation, HARQ, and MIMO performance due to unreliable scheduling grants, CQI, ACK/NACK, and RI/PMI.
Innovation Solution
Priority-based channel coding for control information using polar codes, where control information is sorted, grouped, and prioritized based on importance levels, with selective application of cyclic redundancy checks (CRC) and mapping to bit channels, enabling efficient and reliable transmission of control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted without priority-based sorting and grouping, then the transmission process is simple, but the reliability of control information delivery deteriorates
Solution Approach 1:
The patent segments control information into multiple groups based on priority levels (first control information group, second control information group, etc.). Each group contains control information of similar importance, allowing differential treatment in encoding and transmission. This segmentation enables the system to allocate more robust coding resources to high-priority control information while using simpler coding for low-priority information, thereby improving overall reliability without uniformly increasing complexity.
Solution Approach 2:
The patent applies local quality by assigning different coding schemes and error protection levels to different groups of control information based on their priority. High-priority control information receives more sophisticated error correction and redundancy, while low-priority information uses simpler coding. This localized differentiation of quality ensures that critical control information is reliably delivered without wasting resources on less important data.
2Productivity
If all control information is coded with the same priority, then the coding process is simple, but the data rate and latency performance deteriorates
Solution Approach 1:
The patent divides control information into priority-based segments (groups) that can be processed and transmitted differently. This segmentation allows the system to optimize transmission parameters for each group, such as allocating more bandwidth or using faster coding schemes for high-priority information, thereby improving overall data rate and reducing latency for critical control data without uniformly complicating the entire system.
Solution Approach 2:
The patent performs preliminary sorting and grouping of control information by priority before the actual coding and transmission processes. This preliminary organization enables subsequent processing stages to operate more efficiently on already-categorized data, improving throughput and reducing latency. The upfront classification prevents the need for complex real-time prioritization during transmission, balancing complexity and performance.
3Reliability
If control information is not sorted by priority, then the processing is faster, but the MIMO system operations and performance deteriorates
Solution Approach 1:
The patent segments control information into priority-based groups that can be processed in parallel or in a predetermined sequence. This segmentation allows the MIMO system to handle high-priority control information with more rigorous processing and verification, ensuring reliable MIMO operations, while low-priority information receives expedited but simpler processing. The structured grouping prevents processing bottlenecks by allowing simultaneous handling of different priority levels.
Data Source
AI summary
Systems, methods, and instrumentalities are disclosed for priority-based channel coding for control information. A wireless transmit/receive unit (WTRU) may sort control information associated with a first control information type into a first control information group and the control information associated with a second control information type into a second control information group, for example, based on respective priorities associated with the first and second control information types. The WTRU may group one or more bits of the first control information group into a first bit level control information group and a second bit level control information group based on priority. The WTRU may selectively apply a cyclic redundancy check (CRC) to the first control information group, the second control information group, the first bit level control information group, and/or the second bit level control information group.