Cross-Link Interference Measurement via Shared Reference Signals
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Solution Overview
Problem
Existing wireless communications systems face challenges in managing inter-network entity cross-link interference, which can reduce throughput and increase overhead due to increased device density, particularly in full-duplex and time division duplexing scenarios.
Innovation Solution
Configuring network entities to transmit, receive, and report reference signals for cross-link interference measurements, enabling efficient CLI measurement and scheduling decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted for CLI measurements, then interference measurement capability is improved, but signaling overhead increases
Solution Approach 1:
The patent configures reference signals to serve multiple functions: they are used for both channel state information measurement and cross-link interference measurement. This multi-functionality allows the system to improve interference measurement capability without proportionally increasing signaling overhead, as the same reference signal resources are utilized for multiple measurement purposes.
Solution Approach 2:
The patent introduces configurable parameters including measurement bandwidth (partial or full bandwidth), measurement timing configurations, and reporting configurations. These parameters allow the system to adapt the reference signal transmission and measurement process to balance measurement accuracy requirements against signaling overhead constraints, enabling flexible optimization based on specific network conditions.
2Reliability
If CLI measurement configuration is implemented across multiple network entities, then interference management capability is improved, but system complexity increases
Solution Approach 1:
The patent introduces a centralized controller or coordinating network entity that manages the CLI measurement configuration across multiple network entities. This intermediary coordinates the configuration of reference signals, measurement parameters, and reporting requirements, thereby improving interference management capability while preventing system complexity from becoming unmanageable through centralized control and standardization.
Solution Approach 2:
The patent divides the CLI measurement functionality into distinct configurable components: reference signal transmission configuration, measurement parameter configuration, and reporting configuration. This segmentation allows each component to be independently optimized and configured, reducing the complexity burden on individual network entities while maintaining comprehensive interference management capability across the system.
3Measurement precision
If frequent CLI measurements are performed, then interference detection accuracy is improved, but processing overhead increases
Solution Approach 1:
The patent configures CLI measurements to be performed periodically with configurable measurement periods and timing. This periodic action allows the system to achieve adequate interference detection accuracy by sampling at appropriate intervals, rather than continuously, thereby reducing processing overhead while maintaining sufficient measurement precision for effective interference management.
Solution Approach 2:
The patent allows for partial bandwidth measurements where only specific frequency resources are measured for CLI rather than the entire bandwidth. This partial action approach reduces the processing overhead associated with full-bandwidth measurements while maintaining interference detection accuracy in the critical frequency regions where interference is most likely to occur.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For example, the described techniques provide for configuring a network entity to transmit reference signals for cross-link interference (CLI) measurements, receive reference signals for CLI measurements, or report CLI measurements. A first network entity may transmit an indication to a second network entity of a configuration for transmitting reference signals for CLI measurements. The first network entity may also transmit an indication to a third network entity of a configuration for monitoring for or receiving the reference signals for CLI measurements, and the first network entity may transmit another indication to the third network entity of a configuration for reporting the CLI measurements. The second network entity may then transmit the reference signals, and the third network entity may receive the reference signals, perform CLI measurements on the reference signals, and report the CLI measurements.