CSI Reporting Framework Reducing Overhead via Resource Sharing

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Solution Overview

Problem

Current communication networks face challenges in reducing energy consumption, particularly in 5G networks which require more advanced services and applications, leading to increased energy costs and environmental impact.

Innovation Solution

The proposed solution involves an enhanced CSI reporting framework that optimizes CSI-RS resource configuration and reporting, allowing for the sharing of PMI across multiple sub-configurations associated with the same CSI-RS resource, thereby reducing the number of indicators reported.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If UE-specific CSI-RS resources are configured for each UE, then measurement precision and channel state acquisition are improved, but DL overhead increases linearly with the number of UEs

Engineering Contradiction:

Improvechannel state measurement accuracyVSAvoidDL overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent applies universality by enabling a single CSI-RS resource to serve multiple UEs through report configuration grouping. Instead of dedicating separate CSI-RS resources to each UE, the system allows multiple UEs to share common CSI-RS resources while maintaining individual channel state measurements through coordinated reporting mechanisms, thereby reducing overall DL overhead while preserving measurement precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple CSI report configurations are implemented per component carrier, then adaptability and service support are improved, but device complexity and processing burden increase

Engineering Contradiction:

Improveservice support capabilityVSAvoidCSI computation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies merging by combining multiple CSI report configurations into grouped structures that share common CSI-RS resources. Instead of independently processing each report configuration, the system merges configurations that can utilize the same CSI-RS resource, allowing the UE to perform measurements once and reuse the results across multiple report configurations, thereby reducing computation complexity while maintaining adaptability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies partial action by selectively processing only the necessary portions of CSI report configurations. When multiple configurations share common CSI-RS resources, the system performs partial measurements and computations only for the shared resources, avoiding redundant processing of identical resources across different configurations, thus reducing overall computational burden while preserving full service support capability.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250055536A1Enhanced CSI reporting framework

Publication Date: 2025.02.13 NOKIA TECHNOLOGIES OY

AI summary

An apparatus configured to: determine whether CSI of at least one first sub-configuration of a CSI report configuration and CSI of at least one second sub-configuration of the CSI report configuration are associated to a CSI-RS resource; determine to transmit at least one indicator in the CSI of the at least one first sub-configuration, in response to the CSI of the at least one first sub-configuration and the CSI of the at least one second sub-configuration being associated to the CSI-RS resource; and determine to not transmit at least one indicator in the CSI of the at least one second sub-configuration, in response to the CSI of the at least one first sub-configuration and the CSI of the at least one second sub-configuration being associated to the CSI-RS resource.