CLI Measurement Reporting for Dynamic TDD Interference Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in measuring and reporting cross-link interference (CLI) due to dynamic time division duplexing (TDD) configurations, particularly in 5G new radio (NR), where layer 3 measurements are not flexible enough to handle dynamic CLI effectively.
Innovation Solution
Implementing layer 1 (PHY layer) CLI measurement and reporting, allowing UEs to measure and report CLI without knowing the TDD configurations of aggressor UEs, using higher layer configurations and channel state information (CSI) reporting, with specified parameters and resource settings for efficient CLI measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If layer 3 measurements are used for CLI reporting, then the system maintains simplicity in measurement architecture, but the system loses flexibility in handling dynamic TDD configurations and aggressive CLI scenarios
Solution Approach 1:
The patent implements dynamic CLI measurement and reporting by allowing UEs to perform measurements at layer 1 (PHY layer) rather than being constrained to layer 3 measurements. This enables the system to adapt to dynamic TDD configurations where uplink and downlink directions change over time, as the UE can measure CLI on both uplink and downlink resources regardless of the current TDD state. The measurement configuration can be dynamically adjusted by the network to match changing TDD patterns.
2Measurement precision
If UEs require knowledge of aggressor UE TDD configurations for accurate CLI measurement, then measurement accuracy improves, but system complexity and signaling overhead increase
Solution Approach 1:
The patent enables UEs to perform self-service CLI measurements by measuring interference from aggressor UEs without requiring the aggressor UE's TDD configuration information. The UE measures CLI on resources configured by the network, including both uplink resources (where the UE measures downlink interference from aggressor UEs) and downlink resources (where the UE measures uplink interference). This eliminates the need for complex signaling to exchange TDD configuration information between UEs while maintaining measurement accuracy.
3Loss of information
If CLI measurements are performed on all component carriers, then comprehensive interference information is obtained, but measurement time and processing load increase
Solution Approach 1:
The patent segments the CLI measurement process by component carrier, allowing the network to configure UEs to perform measurements on specific component carriers rather than requiring measurements on all carriers simultaneously. The measurement configuration includes component carrier identifiers and can be tailored to prioritize carriers with higher interference potential or greater traffic importance. This segmentation reduces measurement time and processing load while still capturing the most critical interference information across the carrier aggregation setup.
Data Source
AI summary
Aspects described herein relate to receiving a configuration for cross-link interference (CLI) measurement reporting, wherein the configuration includes, for each component carrier of one or more component carriers, one or more parameters for measuring signals on the component carrier, and a resource setting indicating resources of the component carrier over which to measure signals. One or more measurements of signals received on the resources indicated by the resource setting for the component carrier can be measured based at least in part on the one or more parameters, and reported to a base station.