Cell-Specific SRS Configuration for Cross-Link Interference Sensing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing cross-link interference during dynamic time division duplex operations, particularly in identifying interference levels from neighboring cells without excessive sounding overhead, due to half-duplex constraints of user equipment (UEs).
Innovation Solution
A cell-specific sounding pattern configuration is provided for UEs, specifying resource slots, blocks, and power control parameters, allowing UEs within the same cell to sound simultaneously using the same resources, reducing sounding overhead and enabling interference level identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cell-specific SRS and CSI measurement configurations are implemented, then uplink channel estimation accuracy is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent segments the SRS resource configuration into cell-specific parameters and UE-specific parameters. The base station configures cell-specific SRS resources once for all UEs in a cell, while UE-specific SRS resources are configured individually. This segmentation allows accurate per-UE channel estimation while reducing overall configuration complexity through reuse of cell-level settings.
Solution Approach 2:
The patent implements universal SRS resource configurations at the cell level that can be reused by multiple UEs. The cell-specific SRS configuration serves as a template that reduces the need for individual UE-specific configurations, thereby reducing overall system complexity while maintaining measurement precision through UE-specific adjustments where necessary.
2Measurement precision
If SRS resources are configured per UE, then channel measurement accuracy is improved, but signaling overhead and configuration time increase
Solution Approach 1:
The patent performs preliminary configuration of cell-specific SRS resources before UE-specific configurations. The base station pre-configures common SRS parameters at the cell level, which serves as a foundation for subsequent UE-specific configurations. This preliminary action reduces the time required for individual UE configuration while maintaining measurement accuracy.
Solution Approach 2:
The patent merges cell-specific SRS configurations with UE-specific configurations into a unified framework. By combining common cell-level parameters with UE-specific adjustments, the system reduces total configuration time through parameter reuse while maintaining per-UE measurement accuracy through selective UE-specific customization.
3Adaptability or versatility
If multiple SRS resource types are supported, then system versatility is improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent implements a dynamic SRS configuration system where the base station can flexibly switch between cell-specific and UE-specific SRS resource configurations based on network conditions and UE requirements. This dynamic approach enables the system to adapt to different scenarios (improving versatility) while using a unified configuration framework that manages implementation complexity through consistent processing logic.
Data Source
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AI summary
Aspects directed towards a cell-specific configuration for sounding transmissions and measurements are disclosed. In one example, scheduled entities served by a scheduling entity are identified and a cell-specific sounding pattern configuration uniformly applicable to each of the scheduled entities is generated such that the cell-specific sounding pattern configuration has a different pattern than a cell-specific sounding pattern configuration associated with at least one other cell. The cell-specific sounding pattern configuration is then transmitted to each of the scheduled entities to facilitate an identification of cell-specific resources to use for at least one of a sounding transmission or a sounding measurement. In another example, a cell-specific sounding pattern configuration is received and cell-specific resources associated with the cell-specific sounding pattern configuration are identified. At least one of a sounding transmission or a sounding measurement is then configured according to the cell-specific resources associated with the cell-specific sounding pattern configuration.