Layer-1 Cross-Link Interference Collision Management

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Solution Overview

Problem

Wireless communications systems face challenges in managing cross-link interference (CLI) due to collisions between CLI measurements and downlink transmissions, particularly in Layer-1 signaling, which can lead to inefficient resource allocation and reduced communication reliability.

Innovation Solution

Implementing prioritization schemes at the user equipment (UE) to manage collisions between CLI measurements and downlink transmissions, where the UE receives control signaling from the base station to prioritize downlink transmissions over CLI measurements, especially in cases of periodic scheduling configurations, and adjusts based on priority levels indicated by the base station for specific CLI measurements and transmissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the UE performs CLI measurements in resources scheduled by Layer-1 signaling, then CLI measurement accuracy is improved, but downlink transmission reliability deteriorates due to resource collisions

Engineering Contradiction:
ImproveCLI measurement accuracyVSAvoiddownlink transmission reliability
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent changes the parameter of resource allocation by introducing priority levels that dynamically adjust the timing and resource assignment of CLI measurements versus downlink transmissions. The base station configures different priority levels (e.g., priority 0 for CLI measurements, priority 1 for downlink transmissions) to resolve collisions, ensuring that critical downlink transmissions are not compromised while still enabling accurate CLI measurements at appropriate times.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the UE prioritizes downlink transmissions over CLI measurements, then downlink transmission reliability is improved, but CLI measurement accuracy deteriorates due to missed or delayed measurements

Engineering Contradiction:
Improvedownlink transmission reliabilityVSAvoidCLI measurement accuracy
Core Design Contradiction:
ReliabilityVSMeasurement precision

Solution Approach 1:

The patent introduces dynamic priority adjustment mechanisms where the base station can flexibly assign priority levels based on current network conditions, traffic patterns, and interference scenarios. This dynamic approach allows the system to switch between prioritizing downlink transmissions and CLI measurements as needed, rather than using a static priority scheme, thereby maintaining both transmission reliability and measurement accuracy under varying conditions.

Inventive Principle:
Principle #15Dynamics

3Reliability

If the base station schedules frequent CLI measurements, then CLI monitoring effectiveness is improved, but resource allocation efficiency deteriorates due to increased collisions with downlink transmissions

Engineering Contradiction:
ImproveCLI monitoring effectivenessVSAvoidresource allocation efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent implements periodic CLI measurement scheduling with configurable intervals and priority levels. Instead of continuous or overly frequent measurements that would cause constant collisions, the system schedules CLI measurements at periodic intervals determined by network conditions and interference patterns. This periodic approach maintains effective CLI monitoring while minimizing resource conflicts with downlink transmissions, thereby improving overall resource allocation efficiency.

Inventive Principle:
Principle #19Periodic action

Data Source

PatentUS20250016819A1Layer 1 cross-link interference collision management
Publication Date: 2025.01.09 QUALCOMM INC
  • US20250016819A1 patent drawing
  • US20250016819A1 patent drawing
  • US20250016819A1 patent drawing

AI summary

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for prioritization schemes for prioritizing colliding cross-link interference (CLI) measurements scheduled via Layer-1 signaling and a downlink transmissions scheduled according to periodic configurations. In some examples, a user equipment (UE) may prioritize downlink transmissions over CLI measurements. A UE may not monitor for or may not decode downlink control information scheduling CLI measurements in resources that the UE has a scheduled downlink reception according to a periodic scheduling configuration. In some examples, the UE may prioritize a colliding CLI measurement and downlink transmission based on an indicated priority of each, a type a CLI measurement, a type of downlink transmission, and/or a location of the UE within the cell. The UE may either monitor for the downlink transmission or perform the CLI measurement based on the priority scheme.