Conditional CSI Reporting for Uplink Resource Efficiency

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Solution Overview

Problem

In wireless communication systems, periodic channel state information (CSI) reporting can lead to unnecessary power consumption and resource wastage when channel conditions remain stationary, as devices continue to transmit redundant information, increasing interference and reducing uplink throughput.

Innovation Solution

Implementing a method where user equipment (UE) skips CSI reporting on allocated physical uplink control channel (PUCCH) resources when certain conditions are met, and instead transmits enhanced scheduling information, allowing for more efficient use of resources and reduced power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If periodic CSI reporting is implemented, then channel state information is continuously updated, but power consumption increases and resources are wasted when channel conditions are stationary

Engineering Contradiction:

Improvechannel state information accuracyVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements conditional periodic CSI reporting where the UE transmits CSI reports only when channel conditions change significantly, rather than transmitting periodically regardless of channel state. The network configures reporting periods and thresholds, and the UE evaluates channel variations against these thresholds to determine whether to transmit, thereby reducing unnecessary transmissions during stationary channel conditions while maintaining reliable CSI updates when conditions change.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent introduces dynamic adaptation of CSI reporting behavior based on real-time channel conditions. The UE dynamically adjusts its reporting activity by evaluating whether channel variations exceed configured thresholds, transitioning between reporting and skipping states. This dynamic approach allows the system to maintain reliable CSI information when needed while reducing power consumption during periods of channel stability.

Inventive Principle:

Principle #15Dynamics

2Reliability

If periodic CSI reporting is implemented, then channel state information is continuously updated, but uplink interference increases and throughput decreases

Engineering Contradiction:

Improvechannel state information accuracyVSAvoiduplink throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements conditional periodic CSI reporting where transmissions occur only when channel conditions warrant updates. By evaluating channel variations against configured thresholds before each reporting instance, the system reduces unnecessary uplink transmissions during stationary conditions, thereby decreasing uplink interference and preserving throughput while maintaining accurate CSI information when channel conditions change.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent extracts and removes redundant CSI transmissions from the uplink communication stream. By identifying and eliminating reports that would convey no new information (when channel conditions are stationary), the system reduces uplink resource consumption and interference while maintaining the essential function of CSI reporting when actual channel changes occur.

Inventive Principle:

Principle #2Taking out (Extraction)

3Use of energy by moving object

If CSI report skipping is implemented, then power consumption is reduced, but scheduling information may be lost

Engineering Contradiction:

ImproveUE power consumptionVSAvoidscheduling information

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

The patent enables the PUCCH resources to serve multiple functions: transmitting CSI reports when channel conditions change and transmitting scheduling requests when CSI reporting is skipped. This multi-functionality ensures that the uplink control channel remains active and useful even when CSI reporting is reduced, preventing loss of scheduling information while maintaining power savings from conditional reporting.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces an intermediary mechanism where the UE transmits scheduling requests on PUCCH resources when CSI reporting is skipped. This intermediary approach ensures that scheduling information is not lost during periods of reduced CSI reporting, as the same uplink control channel resources can carry alternative control information to maintain communication coordination.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250089037A1Enhanced schedule request for skipped channel state information

Publication Date: 2025.03.13 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for enhanced scheduling request (SR) transmission for skipped channel state information (CSI) reports. An example method, performed at a user equipment (UE), generally includes receiving first signaling configuring the UE with physical uplink control channel (PUCCH) resources for periodically transmitting channel state information (CSI), wherein the first signaling indicates at least one condition for CSI report skipping, and transmitting enhanced scheduling information on the PUCCH resources if the at least one condition is met.