Aperiodic CSI Reporting via Indication Signaling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing aperiodic report scheme for channel state information in CoMP technology is not flexible enough, resulting in high feedback overhead, as user equipment needs to report information from all transmission points, whereas the base station often requires data from only a subset, leading to inefficient resource management.

Innovation Solution

A method is introduced where user equipment receives indication signaling from the base station with identification information to determine a measurement set for reporting aperiodic channel state information, allowing for selective reporting of channel state information from specific transmission points, using DCI signaling and RRC configuration to trigger and configure the report.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If user equipment reports channel state information from all transmission points in the measurement set, then the base station obtains complete channel state information for scheduling decisions, but the feedback overhead increases significantly

Engineering Contradiction:

Improvechannel state information completenessVSAvoidfeedback overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent extracts and reports only the necessary channel state information from specific transmission points rather than all transmission points. The base station configures which transmission points should be reported through indication signaling, allowing selective extraction of relevant CSI data to reduce feedback overhead while maintaining scheduling effectiveness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of reporting complete CSI from all transmission points (excessive action), the system implements partial reporting where only the required subset of transmission point CSI is reported. This partial action approach reduces feedback overhead while providing sufficient information for base station scheduling decisions.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If the base station configures a large measurement set including multiple coordinated transmission points, then the system achieves better CoMP performance and coverage, but the channel state information feedback complexity increases

Engineering Contradiction:

ImproveCoMP transmission performanceVSAvoidfeedback signaling complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the feedback signaling into configured measurement set information (configured by base station) and indication signaling (triggering specific reports). This segmentation allows the system to maintain a large measurement set for CoMP performance while using indication signaling to selectively trigger reports only when needed, reducing overall feedback complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements dynamic triggering of CSI reports through indication signaling. Rather than continuous reporting from all transmission points, the base station dynamically triggers reports based on scheduling needs, making the feedback mechanism adaptive and reducing complexity while maintaining performance.

Inventive Principle:

Principle #15Dynamics

3Quantity of substance

If aperiodic reporting is used to reduce feedback overhead, then the feedback overhead decreases, but the flexibility to report specific transmission point information is insufficient

Engineering Contradiction:

Improvefeedback overheadVSAvoidreporting flexibility

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent introduces indication signaling as an intermediary between the base station and user equipment for aperiodic reporting. This intermediary mechanism allows the base station to flexibly trigger reports for specific transmission points by setting indication bits, providing both overhead reduction and reporting flexibility without requiring continuous feedback.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system changes the reporting parameters dynamically through indication signaling. By modifying the indication bits in DCI formats, the base station can change which transmission points are reported, the reporting timing, and the report type, providing flexibility within the aperiodic framework without increasing overhead.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10897333B2Method for reporting channel state information, user equipment and base station

Publication Date: 2021.01.19 1FINITY INC

AI summary

A method for reporting channel state information, user equipment and base station. Including receiving, by user equipment, an indication signaling transmitted by a base station, the indication signaling comprising identification information for triggering report of aperiodic channel state information; determining a measurement set of the report of the aperiodic channel state information according to the identification information; and reporting corresponding channel state information to the base station according to the measurement set.