Unified TCI Signaling for Cross-Link Interference Measurement
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Solution Overview
Problem
Wireless communications systems face challenges in accurately measuring cross-link interference (CLI) due to the lack of clear indication of a unified transmission configuration indicator (TCI) state, leading to unclear receive beams used for CLI measurement, which affects network resource allocation and interference management.
Innovation Solution
A UE receives control signaling indicating a CLI measurement resource and an associated TCI state, using the indicated TCI state to generate and transmit a CLI report, with options for unified TCI states or dedicated downlink channels, and supports communication with multiple TRPs through associated CORESET pools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no unified TCI state indication is provided for CLI measurement, then the system maintains simpler signaling, but the CLI measurement precision deteriorates due to unclear receive beam specification
Solution Approach 1:
The patent applies universality by indicating a unified TCI state that serves multiple functions: it specifies the receive beam for CLI measurement and simultaneously indicates the quasi-co-location (QCL) relationship between the CLI measurement resource and downlink channels. This single TCI state indication replaces what would otherwise require separate signaling for beam specification and QCL relationship, thereby improving measurement precision without proportionally increasing signaling complexity.
2Adaptability or versatility
If multiple TCI states are configured for different TRPs with separate CORESET pools, then the system supports more flexible multi-TRP communication, but the device complexity increases due to multiple beam management configurations
Solution Approach 1:
The patent applies segmentation by dividing the multi-TRP system into separate CORESET pools, where each pool is associated with a specific TRP and its own TCI state configuration. This segmentation allows independent beam management for each TRP, enabling flexible multi-TRP communication while organizing the complexity into manageable, isolated units rather than requiring unified complex management across all TRPs.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple TCI states and associating them with different CORESET pools before CLI measurement occurs. The network entity prepares the TCI state indications in advance, so when CLI measurement is triggered, the UE already has the appropriate receive beam configurations ready, reducing the complexity of real-time beam management and selection.
3Reliability
If dedicated TCI states are used for each downlink channel, then the system achieves precise beam control, but the loss of information increases due to multiple separate configurations
Solution Approach 1:
The patent applies merging by combining the TCI state indication for CLI measurement with the QCL relationship indication between the CLI measurement resource and downlink channels. Instead of separately configuring TCI states for each downlink channel and for CLI measurement, the unified TCI state indication merges these functions, reducing configuration information overhead while maintaining reliable beam control through the established QCL relationships.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling (e.g., from a network entity) indicating a CLI measurement resource and an associated transmission configuration indicator (TCI) state. The UE may generate and transmit a CLI report to the network entity using the CLI measurement resource and the beam associated with the indicated TCI state. In some cases, the control signaling may indicate to use the same TCI state as another dedicated downlink channel configured for the UE. In some cases, the control signaling may indicate a unified TCI state to apply for the CLI measurement. In some cases, a UE may be configured to communicate with multiple transmission and reception points (TRPs). The TCI state to apply to the CLI measurement may be based on the TRP scheduling the CLI measurement.