SBFD CLI Measurement Patterns for Multiplexed Downlink Reception
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Solution Overview
Problem
Wireless communication systems employing subband full duplex (SBFD) face challenges with cross-link interference (CLI) that existing technologies have not adequately addressed, leading to inefficiencies in CLI measurements and reporting.
Innovation Solution
A method and apparatus for wireless communication devices to receive configuration signals for multiple candidate resource patterns and rate matching patterns, enabling simultaneous CLI measurement and data reception, followed by reporting measured CLI to a network entity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CLI measurements are performed in SBFD systems, then CLI management accuracy is improved, but measurement efficiency and resource utilization deteriorate due to existing technology limitations
Solution Approach 1:
The patent segments the downlink data channel resources into first resources for CLI measurements and second resources for data signals. Multiple rate matching patterns are defined to selectively map resources based on measurement needs, allowing efficient separation of measurement and data transmission functions without requiring complete resource reallocation.
Solution Approach 2:
The patent introduces dynamic rate matching patterns that can be configured based on measurement requirements. The network entity can dynamically select different rate matching patterns (first pattern for measurements only, second pattern for multiplexed measurements and data) to adapt resource allocation in real-time, improving measurement efficiency without sacrificing data transmission.
2Measurement precision
If multiple rate matching patterns are configured for CLI measurements, then measurement flexibility and accuracy are improved, but system complexity increases
Solution Approach 1:
The patent designs rate matching patterns that serve multiple functions: the first rate matching pattern enables CLI measurements alone, the second rate matching pattern enables multiplexed CLI measurements with data signals, and these patterns can be applied across different downlink data channels. This multi-functionality reduces the need for separate dedicated measurement resources while maintaining measurement accuracy.
Solution Approach 2:
The patent changes the rate matching parameters (mapping between first resources and second resources) to create different measurement scenarios. By adjusting these parameters, the system can switch between measurement-only mode and multiplexed mode, providing flexibility without requiring fundamental system redesign.
3Productivity
If data signals are multiplexed with CLI measurements, then resource utilization is improved, but measurement interference and accuracy deteriorate
Solution Approach 1:
The patent applies local quality by creating spatial and temporal separation between CLI measurement resources and data signal resources through rate matching. The first resources allocated for measurements are mapped to specific second resources for data transmission, ensuring that measurements and data coexist in the time-frequency grid without mutual interference, thus maintaining measurement accuracy while improving overall resource utilization.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. The method may include receiving a signal configuring the user equipment (UE) with one or more resource mappings associated with cross link interference (CLI) measurements and one or more rate matching patterns associated with receiving a data signal multiplexed with the cross link interference measurements. The method may further include measuring CLI in first resources of a downlink data channel in accordance with a rate matching pattern and receiving the data signal via second resources of the downlink data channel in accordance with the rate matching pattern. The method may further include transmitting a report indicating the measured CLI.