UE CSI-RS Reporting with Network-Configured CRI Selection

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Solution Overview

Problem

Existing wireless communication systems lack the ability for the network to actively specify which CSI-RS resources indicators (CRIs) need to be reported by the user equipment, leading to inefficient CSI reporting and increased signaling overhead.

Innovation Solution

Implementing a communication method where the network configures a set of X CRIs and uses DCI to trigger aperiodic CSI reporting, allowing the user equipment to selectively report M-X CRIs based on a CSI-RS resource set associated with the aperiodic trigger state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the UE selects all M CRIs from K CRIs independently, then the UE has full flexibility in CSI reporting, but the network cannot actively specify which CRIs to report based on demand

Engineering Contradiction:

Improvenetwork control flexibilityVSAvoidCSI reporting configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the CRI selection process into two parts: the network configures a subset of X CRIs from the total K CRIs, and the UE selects M-X CRIs from the remaining. This segmentation allows network control flexibility while maintaining UE autonomy in the selection process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic configuration where the network can actively specify which CRIs to report based on real-time demand through RRC signaling and DCI triggers. The configured set of X CRIs can be dynamically adjusted according to network conditions.

Inventive Principle:

Principle #15Dynamics

2Productivity

If the network configures a configured set of X CRIs and uses DCI to trigger aperiodic reporting, then CSI reporting efficiency is improved, but the signaling configuration becomes more complex

Engineering Contradiction:

ImproveCSI reporting efficiencyVSAvoidsignaling configuration

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements aperiodic trigger states that can be activated through DCI signaling. The network can trigger CSI reporting at specific intervals or events rather than continuously, improving efficiency while managing complexity through event-driven activation.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent establishes a feedback mechanism where the network receives CSI reports based on configured sets and triggers. This feedback loop allows the network to optimize future configurations based on actual channel conditions and reporting needs.

Inventive Principle:

Principle #23Feedback

3Loss of energy

If all M CRIs are selected by the UE without network indication, then the UE operates autonomously, but unnecessary signaling overhead increases

Engineering Contradiction:

Improvesignaling overheadVSAvoidUE autonomy

Core Design Contradiction:

Loss of energyVSEase of operation

Solution Approach 1:

The patent extracts the network's CRI selection capability from the traditional UE-only selection model. By separating the selection process into network-configured X CRIs and UE-selected M-X CRIs, the system reduces unnecessary signaling while maintaining UE operational autonomy.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250337543A1Communication method, user equipment and modem chip using the same

Publication Date: 2025.10.30 MEDIATEK INC

AI summary

A communication method, a user equipment and a modem chip using the same are provided. The communication method comprises: receiving, through RRC (Radio Resource Control) signaling, a first configuration of an aperiodic trigger state and a second configuration of a value of M from a network, wherein the first configuration provides a configured set of X CRI(s); receiving a DCI (Downlink Control Information) indicating the aperiodic trigger state by a CSI (Channel State Information) request field in the DCI; and reporting, to the network, M-X CRI(s) based on a CSI-RS resource set associated with the aperiodic trigger state.