UE-to-UE Crosslink Interference Measurement Reporting
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Solution Overview
Problem
Current wireless communication systems lack efficient mechanisms for measuring and reporting User Equipment (UE) to UE crosslink interference (CLI), which can significantly impact network performance and user experience.
Innovation Solution
The proposed solution involves configuring a measurement object to include cross-link sounding reference signal (SRS) resources or cross-link received signal strength indicator (RSSI) resources, allowing for the determination of CLI levels between UEs. This measurement object can trigger reports when predetermined thresholds are exceeded, enabling timely interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE-to-UE crosslink interference measurement and reporting mechanisms are implemented, then network reliability and user experience are improved, but device complexity and measurement configuration complexity increase
Solution Approach 1:
The measurement mechanism is segmented into distinct components: CLI-RSSI measurements for detecting interference from other UEs, and SRS-RSRP measurements for measuring reference signal power. These segmented measurement types can be configured and reported independently, allowing the system to implement CLI measurement without requiring complete redesign of the entire measurement framework, thus improving reliability while managing complexity.
Solution Approach 2:
The network configures measurement objects, reporting configurations, and resource allocations in advance before CLI measurement is needed. This preliminary configuration includes setting up CLI-RSSI and SRS-RSRP measurement parameters, threshold values, and reporting triggers. By preparing these measurement frameworks beforehand, the system enables reliable CLI detection when needed without creating complexity during actual interference events.
2Measurement precision
If CLI measurement resources are allocated for all UEs, then measurement precision is improved, but loss of energy and resource overhead increase
Solution Approach 1:
CLI measurement resources and configurations are applied locally and selectively to specific UEs based on their actual interference conditions rather than uniformly to all UEs. The network can configure CLI-RSSI and SRS-RSRP measurements for UEs experiencing crosslink interference while leaving other UEs with standard measurement configurations. This localized approach ensures measurement precision for affected UEs without causing unnecessary energy consumption across the entire network.
Solution Approach 2:
The system implements partial CLI measurement by selecting specific UEs and specific time-frequency resources for measurement rather than comprehensive measurement for all UEs at all times. Measurement objects can be configured to monitor only certain SRS resources or RSSI measurements in specific conditions, providing sufficient measurement precision for interference management while reducing overall energy consumption and resource overhead.
3Loss of time
If event-triggered reporting is implemented, then loss of time for interference management is reduced, but device complexity for event monitoring increases
Solution Approach 1:
The system implements event-triggered reporting where UEs continuously monitor CLI measurements (CLI-RSSI and SRS-RSRP) against configured thresholds and report only when events occur. This feedback mechanism compares measured values with threshold values and triggers reports only when interference conditions exceed acceptable levels. This approach reduces time loss for interference management by ensuring timely reporting of actual interference events while avoiding unnecessary reporting, and the event monitoring complexity is managed through standardized threshold comparison logic.
Data Source
AI summary
Disclosed are apparatuses and methods for measuring and/or reporting UE-to-UE crosslink interference (CLI). Techniques of realizing efficient L3 CLI RSSI and SRS-RSRP reporting and triggering mechanisms are disclosed. The disclosed apparatuses and methods can configure a measurement object to include a cross-link sounding reference signal (SRS) resource or a cross-link received signal strength indicator (RSSI) resource. A level of cross-link interference (CLI) between a first user equipment (UE) and a second UE based is determined, at least in part, on the configured measurement object. Then, in response to occurrence of a predetermined event, a report is generated that includes the level of CLI. The measurement object is configured to include a resource configuration parameters for a cross-link interference received signal strength indicator (CLI-RSSI) measurement and sounding reference signal (SRS) resource configurations for a cross-link SRS reference signal received power (SRS-RSRP) measurement. One of the first or second UEs can transmit the report.