CSI Reporting During Small Data Transfer Sessions

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) reports during small data transfer sessions, particularly in reducing power consumption and processing resources for user equipment (UE) in radio resource control (RRC) inactive states.

Innovation Solution

The system configures user equipment (UE) to measure and report CSI based on reference signals indicated by the base station during small data transfer sessions, allowing the base station to adjust parameters for improved communication quality and reliability, even in RRC inactive states by using periodic, semi-persistent, or aperiodic CSI reference signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If CSI reporting is performed during SDT sessions, then communication reliability is improved, but power consumption and processing resources increase

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic CSI reporting by allowing the UE to selectively perform CSI measurements and reports based on whether SDT sessions are actively occurring. The system transitions between different reporting states (active during SDT, inactive during idle periods) to match actual communication needs, preventing continuous power consumption while maintaining reliability when required

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system employs periodic SDT sessions rather than continuous communication, with CSI reporting activated only during these periodic windows. This allows the UE to enter low-power states between sessions while ensuring channel state information is freshly updated when communication actually occurs, resolving the trade-off between continuous monitoring power cost and reliability

Inventive Principle:

Principle #19Periodic action

2Reliability

If CSI reporting is performed during SDT sessions, then communication quality is improved, but processing resources increase

Engineering Contradiction:

Improvecommunication qualityVSAvoidprocessing resources

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements partial CSI reporting by selectively measuring and reporting only certain channel state parameters during SDT sessions rather than performing complete CSI analysis continuously. This partial action approach provides sufficient communication quality for small data transfers while significantly reducing processing resource requirements compared to full CSI reporting

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system uses self-service by leveraging existing reference signals (CSI-RS, SRS) that are already being transmitted for other purposes during SDT sessions. The UE performs CSI measurements on these existing signals without requiring additional dedicated measurement resources, thus improving communication quality while minimizing additional processing overhead

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250008362A1Channel state information reports during a small data transfer session

Publication Date: 2025.01.02 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication of a set of reference signals for measurement during a small data transfer (SDT) session associated with the UE. Accordingly, the UE may transmit, to the base station and during the SDT session, a channel state information report based at least in part on measuring the set of reference signals during the SDT session. Numerous other aspects are described.