PUCCH Resource Determination for CSI Report Timing

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Solution Overview

Problem

The increasing demand for high data throughput and communication capacity in wireless communication systems, particularly due to the rise of M2M communication and high-density user equipment, poses challenges in efficiently managing limited radio resources and reducing latency in next-generation wireless communication systems.

Innovation Solution

A method for efficiently transmitting channel state information (CSI) reports in wireless communication systems by determining a physical uplink control channel (PUCCH) resource that does not start earlier than a specific time after receiving downlink control information and CSI reference signals, ensuring timely and optimized resource allocation for CSI reports.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the PUCCH resource is determined without considering the minimum CSI computation time, then the resource allocation is simplified, but the CSI report timing may be premature and inaccurate

Engineering Contradiction:

Improveresource allocation complexityVSAvoidCSI report timing accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent introduces timing parameter constraints (T+X and T'+Y) that dynamically adjust the PUCCH resource selection based on when DCI and CSI-RS are received. This parameter-based approach ensures the CSI computation time requirement is met while maintaining systematic resource allocation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent pre-configures multiple periodic PUCCH resources for the UE, and the UE selects from these pre-configured resources based on the timing constraints. This preliminary configuration approach simplifies real-time decision-making while ensuring timing accuracy

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If more PUCCH resources are configured for CSI reports, then the timing flexibility is improved, but the resource overhead increases

Engineering Contradiction:

ImproveCSI report timing flexibilityVSAvoidPUCCH resource overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent makes the PUCCH resource selection dynamic by allowing the UE to choose from multiple periodic resources based on real-time timing conditions (T+X and T'+Y constraints). This dynamic selection provides timing flexibility without requiring dedicated resources for every possible timing scenario

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The periodic PUCCH resources are configured to serve multiple purposes - they can be used for CSI reports, HARQ acknowledgments, and other uplink control information. This multi-functionality reduces overall resource overhead while maintaining timing flexibility for CSI reports

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20230396298A1Method, user equipment, processing device, storage medium and computer program for transmitting channel state information report, and method and base station for receiving channel state information report

Publication Date: 2023.12.07 LG ELECTRONICS INC

AI summary

A UE may receive DCI triggering a CSI report; receive a CSI-RS associated with the CSI report; determine a PUCCH resource for the CSI report; and transmit the CSI report on the basis of the PUCCH resource. Determining the PUCCH resource for the CSI report comprises: determining, among periodically allocated PUCCH resources configured for the UE, a PUCCH resource that does not start earlier than time point T+X and time point T′+Y as the PUCCH resource for the CSI report, wherein time point T is the end of the DCI, X is the minimum CSI calculation time from DCI reception, time point T′ is the end of the CSI-RS associated with the CSI report, and Y is the minimum CSI calculation time from CSI-RS reception.