TCI-State Interference Measurement in Multi-TRP Full-Duplex Links
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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 wireless communications.
Innovation Solution
Configuring communication devices with one or more transmission configuration indicator (TCI) states for cross-link interference measurement and reporting, enabling them to perform measurements and report interference metrics using indicated TCI states, which can be associated with multiple receive beams and time offsets.
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 is improved, but cross-link interference occurs that degrades wireless communications
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures cross-link interference on uplink resources using downlink TCI states and feeds back interference metrics (such as RSRP or RSSI) to the network entity. This feedback enables the network to adjust resource allocation, TCI state configurations, or power settings to mitigate the interference while maintaining full-duplex operation.
Solution Approach 2:
The patent introduces TCI states as an intermediary mechanism that links downlink beam configurations to uplink interference measurement. By using downlink TCI states to configure uplink interference measurement resources, the system creates a reference framework that allows the UE to measure and report interference in a manner that the network can interpret and act upon to resolve the interference issue.
2Measurement precision
If TCI states are configured for cross-link interference measurement to improve measurement accuracy, then interference measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes TCI states multi-functional by using them for both downlink reception configuration and uplink interference measurement configuration. Instead of creating separate measurement configurations, the same TCI state framework is reused for interference measurement, reducing the need for additional complex configuration mechanisms while maintaining measurement accuracy.
Solution Approach 2:
The patent changes the parameters associated with TCI states to enable interference measurement functionality. By configuring TCI states to include uplink interference measurement resource indications and associated parameters (such as resource sets, power control settings), the system extends the existing TCI state framework to serve measurement purposes without requiring entirely new configuration structures.
3Reliability
If multiple TCI states are used for interference measurement to account for multiple receive beams, then reliability of wireless communications is improved, but configuration complexity increases
Solution Approach 1:
The patent segments the interference measurement process by associating different TCI states with different receive beams or spatial directions. Each TCI state can be configured with specific interference measurement resources tailored to its associated beam, allowing the system to measure interference from different directions independently and make more reliable decisions about resource allocation and interference mitigation.
Solution Approach 2:
The patent performs preliminary configuration of TCI states with interference measurement parameters before actual interference measurement and communication operations begin. By pre-configuring multiple TCI states with their associated measurement resources, spatial relationships, and reporting settings, the system prepares the measurement framework in advance, reducing runtime complexity and enabling more reliable interference management during full-duplex operation.
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.