PUCCH Resource Allocation for Mixed-Priority UCI
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Solution Overview
Problem
In New Radio (NR) Release 17, the multiplexing of uplink control information (UCI) with different priorities results in resource waste due to the high-priority UCI being transmitted with a coding rate lower than required, leading to inefficient use of physical resources.
Innovation Solution
A method for determining the number of physical resource blocks (PRBs) based on the total number of bits and maximum coding rates of both high-priority and low-priority UCI to ensure reliable transmission while optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PRBs are determined according to the low coding rate corresponding to high-priority UCI to ensure reliability, then the reliability of high-priority UCI is ensured, but the number of physical resources occupied by low-priority UCI becomes significantly greater than required, resulting in resource waste
Solution Approach 1:
The patent segments the UCI transmission resources by priority level. It divides the total PRBs into separate allocations for high-priority UCI and low-priority UCI, allowing each priority level to use appropriate coding rates and resource amounts independently, thus avoiding resource waste while ensuring high-priority reliability
Solution Approach 2:
The patent applies different resource allocation strategies to different priority levels. High-priority UCI receives resources allocated based on its strict reliability requirements, while low-priority UCI receives resources optimized for efficiency, creating locally optimized quality for each priority segment
2Productivity
If multiplexing transmission of information carried in overlapped channels with different priorities is supported, then system efficiency is improved, but the performance requirements of high-priority information may not be ensured if transmitted according to low-priority parameters
Solution Approach 1:
The patent implements dynamic resource allocation where the PRB allocation is adjusted based on the priority mix of multiplexed UCI. The system dynamically determines the number of PRBs by considering both high-priority and low-priority UCI characteristics, ensuring high-priority performance is maintained while enabling multiplexing for improved system efficiency
Data Source
AI summary
A method for wireless communication, a terminal device, and a network device are provided. The method includes the following. A terminal device determines a physical uplink control channel (PUCCH) resource, where the PUCCH resource is used for transmitting first uplink control information (UCI) and second UCI, and a priority of the first UCI is different from a priority of the second UCI. The terminal device determines a first number of physical resource blocks (PRB) according to a total number of bits of the first UCI, a total number of bits of the second UCI, a first maximum coding rate corresponding to the first UCI, and a second maximum coding rate corresponding to the second UCI, where the first number of PRBs is less than or equal to a number of PRBs MRBPUCCH in the PUCCH resource. The terminal device transmits target UCI according to the first number of PRBs.