L1 SRS-RSRP Reporting for Cross-Link Interference Management

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Solution Overview

Problem

Current wireless communication systems face inefficiencies in managing cross-link interference (CLI) between user equipment (UE) due to the reliance on higher-level messages for SRS-RSRP measurements, which can degrade system performance.

Innovation Solution

Implementing mechanisms for UE to transmit SRS-RSRP measurements using the physical layer (L1) to provide an efficient indication of CLI between UEs, allowing for standalone reports without additional reference measurements, and configuring channel state information (CSI) to optimize SRS-RSRP processing and reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If SRS-RSRP measurements are transmitted using higher-level messages (RRC layer), then the measurement reporting mechanism is established, but system performance degrades and efficiency is reduced

Engineering Contradiction:

ImproveCLI management accuracyVSAvoidmeasurement reporting efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent inverts the conventional approach by transmitting SRS-RSRP measurements upward from physical layer (L1) to higher layers, rather than the traditional downward or lateral messaging. This inversion enables direct L1 reporting of CLI measurements to the base station, achieving both improved accuracy and efficiency simultaneously

Inventive Principle:

Principle #13The other way round (Inversion)

2Quantity of substance

If standalone SRS-RSRP measurement reports are implemented without additional reference measurements, then reporting overhead is reduced, but measurement completeness may be affected

Engineering Contradiction:

Improvereporting overheadVSAvoidCLI indication accuracy

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent extracts the SRS-RSRP measurement reporting function from the bundle of comprehensive CSI reports, creating a standalone measurement report that focuses specifically on CLI indication. This extraction reduces reporting overhead while maintaining sufficient accuracy for CLI management purposes

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20240251271A1Sounding reference signal (SRS) reference signal received power (SRS-RSRP) reporting in wireless systems

Publication Date: 2024.07.25 APPLE INC

AI summary

Some aspects relate to apparatuses and methods for a wireless system implementing mechanisms to transmit a measurement report using physical layer (L1) carrying a sounding reference signal (SRS) reference signal received power (SRS-RSRP) measurement to provide an indication of cross link interference (CLI) between a first user equipment (UE) and a second UE. The first UE can determine a channel state information (CSI) configuration received from the base station; and configure, based on the CSI configuration, a channel measurement resource (CMR) to include a SRS received from the second UE. The first UE can measure the SRS to obtain a SRS-RSRP measurement, generate a measurement report having the SRS-RSRP measurement, and transmit the measurement report to the base station using L1.