CSI Reporting With Time-Domain DMRS Bundling Assumptions

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Solution Overview

Problem

Existing wireless communication systems face challenges in accurately reporting channel state information (CSI) due to uncertainties related to time-domain reference signal bundling configurations, leading to underreporting of channel conditions and reduced throughput.

Innovation Solution

Implementing a time-domain reference signal bundling configuration assumption for CSI reporting, where a UE determines CSI based on a configured bundling assumption, allowing for improved CSI feedback and reporting, thereby enhancing network efficiency and throughput.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If time-domain reference signal bundling is used for downlink transmissions, then channel estimation accuracy is improved, but uncertainty in CSI reporting increases leading to underreporting of channel conditions

Engineering Contradiction:

Improvechannel estimation accuracyVSAvoidCSI reporting accuracy

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The base station configures the UE with a time-domain reference signal bundling assumption before CSI reporting occurs. This preliminary configuration allows the UE to understand how reference signals are bundled across multiple slots, enabling accurate CSI calculation that accounts for the actual channel conditions under bundling operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE calculates CSI based on the configured bundling assumption and provides feedback to the base station. This feedback mechanism allows the base station to understand the actual channel conditions as perceived by the UE, enabling the base station to adjust future transmissions to match the UE's channel conditions more accurately.

Inventive Principle:

Principle #23Feedback

2Reliability

If conservative CSI reporting is used to account for bundling uncertainty, then reliability is improved, but throughput is reduced due to underreporting of channel conditions

Engineering Contradiction:

ImproveCSI reporting reliabilityVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system changes the parameter of CSI calculation by introducing a configurable time-domain reference signal bundling assumption. This parameter allows the UE to adjust its CSI calculation method based on the actual bundling configuration, enabling accurate CSI reporting that reflects true channel conditions without requiring conservative underreporting.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If the base station does not know the UE's bundling assumption, then device complexity is reduced, but adaptability decreases leading to mismatched transmissions

Engineering Contradiction:

Improvesystem complexityVSAvoidtransmission adaptability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The base station configures the UE with a time-domain reference signal bundling assumption through RRC signaling or MAC CE before CSI reporting and data transmissions occur. This preliminary configuration ensures both the base station and UE operate with the same understanding of the bundling configuration, enabling adaptive transmissions without requiring complex real-time negotiation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12567936B2Channel state information report for bundled downlink shared channel

Publication Date: 2026.03.03 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a channel state information (CSI) report configuration indicating a time-domain reference signal bundling configuration assumption for CSI reporting in accordance with the CSI report configuration; and transmit a CSI report based at least in part on the time-domain reference signal bundling configuration assumption.