Adaptive L3 Cross-Link Interference Measurement Framework

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Solution Overview

Problem

Current wireless communication systems face challenges in adaptively managing cross-link interference (CLI) and self-interference, particularly in full-duplex modes, due to inflexible interference measurement configurations and high control signaling overhead, which degrades downlink reception performance.

Innovation Solution

An adaptive Layer 3 (L3) CLI measurement and reporting framework is introduced, incorporating adaptive fields in L3 messages to configure and report CLI measurements, allowing for dynamic adaptation to interference conditions while reducing control signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If static or semi-static RRC signaling is used to configure periodic measurement resources, then control overhead is reduced, but flexibility and latency in reporting CLI feedback deteriorate

Engineering Contradiction:

Improvecontrol overheadVSAvoidflexibility in interference measurement configuration

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic fields within the L3 message structure that allow measurement and reporting parameters to be adjusted adaptively based on current interference conditions. This enables the system to transition from static configuration to dynamic adaptation while maintaining L3 signaling efficiency, resolving the contradiction between control overhead and flexibility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent modifies the L3 message structure by incorporating adaptive fields that allow parameters such as measurement bandwidth, reporting period, and threshold values to be dynamically changed based on interference conditions. This enables flexible adaptation without switching to higher-layer signaling, thus reducing control overhead while improving adaptability.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If L1/L2 CLI reporting is used to track dynamic changes in interference conditions, then adaptability improves, but control signaling overhead increases

Engineering Contradiction:

Improveability to track dynamic interference changesVSAvoidcontrol signaling overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent introduces an intermediary adaptive L3 framework that mediates between L1/L2 dynamic reporting and traditional static L3 configuration. This intermediary layer provides the flexibility of L1/L2 reporting while maintaining the lower overhead characteristics of L3 signaling, thus resolving the contradiction between adaptability and control overhead.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent enables dynamic adaptation within L3 signaling by incorporating fields that allow measurement and reporting parameters to be adjusted based on interference conditions, providing L3-level adaptability without requiring the higher overhead of L1/L2 reporting mechanisms.

Inventive Principle:

Principle #15Dynamics

3Loss of energy

If static measurement configuration is used, then control overhead is reduced, but latency in reporting CLI feedback increases

Engineering Contradiction:

Improvecontrol overheadVSAvoidlatency to report CLI feedback

Core Design Contradiction:

Loss of energyVSLoss of time

Solution Approach 1:

The patent introduces adaptive fields in L3 messages that allow reporting parameters such as periodicity and thresholds to be dynamically adjusted. This enables the system to reduce latency when interference conditions require rapid response while maintaining lower control overhead through L3 signaling, resolving the contradiction between overhead and latency.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If adaptive L3 fields are added to configure CLI measurements, then flexibility improves, but message complexity increases

Engineering Contradiction:

Improveflexibility in CLI measurement configurationVSAvoidL3 message structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the L3 message structure by introducing optional adaptive fields that can be selectively included or excluded based on deployment requirements. This segmentation allows flexibility to be added incrementally without requiring complete redesign of the message structure, thus managing complexity while improving adaptability.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11902816B2Adaptive cross-link interference measurement and reporting framework

Publication Date: 2024.02.13 QUALCOMM INC

AI summary

In a wireless network, a base station may configure a victim user equipment (UE) experiencing interference with a periodic measurement resource using Layer 3 (L3) signaling, and the UE may report cross-link interference (CLI) measurements to the base station using L3 messages. However, using L3 signaling to configure interference measurement and reporting may result in an inflexible interference measurement configuration and a long latency to report CLI and/or self-interference feedback. Furthermore, although Layer 1 and/or Layer 2 (L1/L2) CLI reporting may be more suitable to track and adapt to dynamic changes in interference conditions, L1/L2 signaling increases control signaling and CLI management overhead at the base station. Accordingly, some aspects described herein relate to an adaptive L3 CLI measurement and reporting framework, where L3 messages may include one or more adaptive fields to support flexibility in configuring CLI measurement and/or CLI reporting parameters.