Multi-TRP Cross-Link Interference Measurement With TCI States
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Solution Overview
Problem
Wireless communications systems face challenges in accurately measuring and reporting cross-link interference in multiple transmission and reception point (TRP) systems, particularly when communication devices operate in full-duplex mode, leading to interference that degrades network performance.
Innovation Solution
Configuring communication devices with transmission configuration indicator (TCI) states for cross-link interference measurement and reporting, enabling them to perform measurements using multiple TCI states and report corresponding metrics, thereby enhancing interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication devices operate in full-duplex mode to enable concurrent transmission and reception, then communication efficiency and data rates are improved, but cross-link interference is generated that degrades network performance
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures cross-link interference on uplink resources, determines whether the interference exceeds a threshold, and reports this information back to the network entity. The network entity then uses this feedback to adjust scheduling decisions, preventing or rescheduling uplink transmissions that would cause harmful interference to downlink receptions.
Solution Approach 2:
The patent performs preliminary cross-link interference measurement and reporting before actual data transmission scheduling. The UE is configured with measurement resources and performs interference assessment in advance, allowing the network to proactively adjust scheduling to avoid interference scenarios before they occur, rather than reacting after interference has degraded performance.
2Measurement precision
If multiple TCI states are configured for cross-link interference measurement, then measurement precision and interference detection accuracy are improved, but device complexity increases
Solution Approach 1:
The patent segments the cross-link interference measurement process by configuring multiple TCI states, each associated with specific downlink reference signals and uplink resources. Each TCI state represents a separate spatial filter or beam configuration, allowing the UE to measure interference independently for different spatial directions and transmission points, thereby improving measurement precision through divided measurement tasks.
Solution Approach 2:
The patent creates a universal measurement framework where TCI states serve multiple functions: they define spatial filters for downlink reception, identify associated uplink resources for interference measurement, and enable reporting of interference metrics. This multi-functionality allows the same TCI state configuration to support both normal communication and interference measurement without requiring separate dedicated configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a message indicating a configuration for measurement of cross-link interference associated with the UE. The configuration may indicate one or more TCI states for the UE to use for performing one or more cross-link interference measurements. The UE may perform the one or more cross-link interference measurements in accordance with the configuration. The UE may perform the one or more cross-link interference measurements over a set of cross-link interference resources using the one or more TCI states. The UE may transmit a cross-link interference report indicating one or more cross-link interference metrics corresponding to the one or more cross-link interference measurements.