Spatial Element Adaptation Using RS Group-Based CSI Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing spatial elements, such as antenna ports and TRUs, leading to high signaling overhead in CSI-RS configurations and reporting, which hinders efficient beam management and adaptation.
Innovation Solution
A method and apparatus for determining RS groups based on RS sets to optimize CSI and SSB measurements and reporting, reducing signaling overhead by configuring RS groups through MAC CE, group common DCI, or dynamic scheduling DCI, and performing differential reporting metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed CSI-RS configurations are provided for each spatial element, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent segments CSI-RS resources into groups (first CSI-RS resource set, second CSI-RS resource set, etc.) where each set contains multiple CSI-RS resources. This segmentation allows the system to configure and report spatial element information at the set level rather than at the individual resource level, reducing signaling overhead while maintaining measurement precision through group-based differential reporting.
Solution Approach 2:
The patent merges multiple CSI-RS resources into resource sets and further combines these sets into resource groups. By merging individual CSI-RS configurations into grouped structures, the system reduces the total number of separate signaling messages needed while preserving the measurement capabilities through the grouped configuration approach.
2Adaptability or versatility
If multiple CSI reports are configured for different spatial domain configurations, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic reporting mechanisms where the UE determines which CSI reports to generate and transmit based on the configured resource groups and sets. The reporting is triggered dynamically through MAC CE or DCI signaling, allowing the system to adapt the number and type of CSI reports generated based on current spatial element configuration needs, thereby reducing complexity while maintaining adaptability.
Solution Approach 2:
The patent employs feedback mechanisms where the UE measures CSI based on configured resource groups and reports differential information back to the network. This feedback loop allows the system to adapt spatial domain configurations based on actual measurement results, with the feedback structure optimized through group-based reporting to reduce processing complexity.
Data Source
AI summary
Embodiments of the present application relate to a method and apparatus of supporting spatial element adaption. An exemplary apparatus, e.g., a UE may include: a transceiver and a processor coupled to the transceiver. The processor is configured to: receive a first signaling indicating at least one RS set, wherein, each RS set includes at least one RS resource; determine at least one RS group based on the at least one RS set; and perform reporting based on at least one of: the at least one RS group or the at least one RS set.