PUCCH UCI Transmission with Segmented CSI Parts
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving uplink control information on the physical uplink control channel (PUCCH), particularly in determining the appropriate resource allocation and coding rates for channel state information (CSI) reports, which affects resource utilization and decoding complexity.
Innovation Solution
A method for a user equipment (UE) to determine the number of coded bits and resource blocks for transmitting CSI reports on the PUCCH by receiving control information from the base station, partitioning CSI into fixed and variable parts, and using specific parameters to configure the maximum coding rate and modulation order, allowing efficient multiplexing of multiple UCI on the PUCCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the UE transmits multiple UCI on PUCCH with variable-size CSI reports, then the information transmission capacity is improved, but the resource allocation complexity and decoding complexity increase
Solution Approach 1:
The CSI report is divided into two distinct parts: Part 1 with fixed size and Part 2 with variable size. This segmentation allows the base station and UE to handle fixed and variable portions separately, simplifying resource allocation while maintaining the ability to transmit comprehensive CSI information. The fixed Part 1 can be allocated deterministic resources, while Part 2 can be allocated based on actual needs.
Solution Approach 2:
The patent introduces specific parameters (first parameter for number of coded bits, second parameter for size of first part, third parameter for maximum coding rate, fourth parameter for modulation order) that dynamically control the resource allocation. By changing these parameters based on the actual CSI report size and channel conditions, the system optimizes resource utilization while managing complexity.
2Ease of operation
If the UE determines PUCCH resources by assuming specific rank for CSI reports, then the resource determination is simplified, but the adaptability to different CSI sizes is reduced
Solution Approach 1:
By segmenting CSI into fixed Part 1 and variable Part 2, the patent enables the base station to determine PUCCH resources based on the fixed Part 1 size (which corresponds to a specific rank assumption), while still accommodating variable-size reports through Part 2. This maintains operational simplicity while preserving adaptability.
Solution Approach 2:
The base station determines PUCCH resources in advance based on the assumption of a specific rank (related to the size of Part 1). This preliminary resource determination simplifies the operation, and the actual variable-size Part 2 is then transmitted within the allocated resources without requiring complex re-allocation.
3Reliability
If the UE prioritizes decoding of critical UCI components (HARQ-ACK and CSI), then the reliability of critical information is improved, but the overall decoding time increases
Solution Approach 1:
The segmentation of CSI into Part 1 and Part 2, combined with the structured UCI transmission format, enables the base station to prioritize decoding of critical components (HARQ-ACK and CSI Part 1) first. The fixed-size Part 1 contains essential CSI information that can be decoded independently and prioritized, while Part 2 is decoded subsequently if resources permit.
Data Source
AI summary
A method for transmitting multiple uplink control information (UCI) on a physical uplink control channel (PUCCH) in a wireless communication system is disclosed. More specifically, the method performed by a user equipment (UE) includes receiving, from a base station, first control information related to the PUCCH for transmitting the multiple UCI; determining a first parameter representing a number of coded bits for the multiple UCI based on the first control information, wherein the multiple UCI includes channel state information (CSI) including at least one of a first part or a second part; determining a size of the first part based on the first parameter and second control information related to the size determination of the first part; and transmitting, to the base station, the multiple UCI on the PUCCH.