Cross-link interference measurement via QCL reference signals
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Solution Overview
Problem
Conventional wireless communication systems face challenges in accurately measuring cross-link interference (CLI) due to the lack of quasi-co-location (QCL) information for serving reception beams, which hinders effective interference mitigation.
Innovation Solution
Incorporating QCL information into reference signal measurement configurations, such as SRS measurements, to enable UE devices to report CLI metrics based on precise serving reception beam measurements, allowing base stations to better identify and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If QCL information is not included in reference signal measurement configurations, then device complexity is reduced, but CLI measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring QCL information in the reference signal measurement configuration before CLI measurements are performed. This allows the UE to have advance knowledge of the spatial relationship between reference signals, enabling more accurate CLI measurements without requiring complex real-time calculations. The QCL information is provided in advance through RRC signaling or MAC CE, preparing the measurement apparatus beforehand.
2Measurement precision
If QCL information is incorporated into measurement configurations, then CLI measurement precision is improved, but information processing overhead increases
Solution Approach 1:
The patent applies copying by transmitting QCL information through efficient signaling mechanisms (RRC signaling or MAC CE) that create a copy of the spatial relationship data without requiring full duplication of measurement procedures. The QCL information serves as a compact representation of spatial relationships that can be reused across multiple measurements, reducing overall information processing overhead while maintaining measurement precision.
3Reliability
If multiple serving reception beams are measured, then interference mitigation effectiveness is improved, but measurement time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring QCL information for multiple serving reception beams before measurements are performed. This allows the UE to efficiently measure multiple beams by utilizing the pre-provided spatial relationship information, reducing the time required for each measurement while still achieving comprehensive interference mitigation across multiple beam directions.
Solution Approach 2:
The patent applies dynamics by enabling the network to dynamically select and configure which serving reception beams should be measured based on current network conditions and interference patterns. The base station can adaptively adjust the measurement configuration to focus on the most critical beams, optimizing the balance between measurement comprehensiveness and measurement time consumption.
Data Source
AI summary
A method of wireless communication is presented. The method includes receiving, at a user equipment (UE) from a base station, a measurement configuration comprising quasi-co-location (QCL) information for a serving reception beam. The method also includes measuring cross-link interference experienced on the serving reception beam. The method further includes transmitting the QCL information for the serving reception beam and a corresponding sounding reference signal-reference signal received power (SRS-RSRP) or cross-link information-received signal strength indicator (CLI-RSSI) to the base station.