Priority-Based Control Channel Coding for Reliable 5G NR Signaling
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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 system 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 joint encoding and decoding of multiple control information types.
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 acquisition deteriorates
Solution Approach 1:
The patent segments control information into multiple groups based on priority levels (first group, second group, third group, fourth group). Each group contains control information of similar importance, allowing differentiated error protection strategies. This segmentation resolves the contradiction by organizing complex control information into manageable segments that can be protected at appropriate levels without uniformly complicating the entire transmission process.
Solution Approach 2:
The patent applies different error protection qualities to different groups of control information. Higher priority groups receive stronger error correction coding, while lower priority groups receive lighter protection. This local quality differentiation improves overall reliability where needed without unnecessarily increasing complexity across all control information transmissions.
2Reliability
If all control information is protected with equal error correction, then the reliability is uniform, but the use of energy increases
Solution Approach 1:
The patent applies differentiated error correction strength to different control information groups based on their priority. Critical control information (first and second groups) receives stronger error protection, while less critical information (third and fourth groups) receives lighter protection. This resolves the energy-reliability contradiction by concentrating energy resources where they are most needed rather than uniformly distributing them across all control information.
Solution Approach 2:
The patent applies partial error correction action - not all control information receives maximum error protection. Only the most critical groups receive excessive error correction, while other groups receive appropriate but reduced protection. This partial action approach maintains reliability for essential control information while reducing overall energy consumption compared to uniform maximum protection.
3Reliability
If control information is sorted and grouped by priority, then the delivery reliability improves, but the processing time increases
Solution Approach 1:
The patent performs sorting and grouping of control information as a preliminary action before transmission and error correction. By organizing control information into priority groups in advance, the system establishes a structured framework that facilitates efficient error protection application during transmission. This preliminary organization reduces the processing burden during time-critical transmission phases, resolving the contradiction between preparation time and delivery reliability.
4Measurement precision
If multiple CRC checks are applied selectively to different control information groups, then the error detection capability improves, but the device complexity increases
Solution Approach 1:
The patent segments control information into four distinct groups and applies cyclic redundancy check (CRC) protection selectively to different segments. This segmentation allows the system to attach CRC checks to specific priority groups based on their error detection requirements, improving overall error detection precision without requiring uniform CRC application across all control information, thereby managing complexity through structured segmentation.
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.