Dynamic CSI-RS Subset Selection for Wireless Channel Adaptation
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Solution Overview
Problem
Conventional wireless communication systems lack flexibility in adapting dynamic channel changes due to fixed configurations of CSI-RS and CSI feedback, which limits the accuracy and adaptability of channel state information measurement and feedback.
Innovation Solution
A method that allows terminals to dynamically configure and select subsets of CSI-RS pilot resources for channel measurement and feedback based on configuration signaling, feedback type, and channel conditions, enabling flexible adaptation to changing channel states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the base station semi-statically configures BFed CSI-RS through RRC signaling, then the configuration is stable and simple to manage, but the system lacks flexibility to adapt to dynamic channel changes
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the terminal to select different CSI-RS resource configurations from multiple pre-configured options based on current channel conditions. The terminal determines a first CSI-RS resource configuration from a set of configurations provided by the base station, enabling the system to transition from purely semi-static to dynamically adaptable configuration while maintaining management simplicity.
2Ease of operation
If the base station periodically sends BFed CSI-RS with identical resource configuration, then the feedback process is simple and consistent, but the system cannot flexibly change CSI-RS sending and feedback according to channel state
Solution Approach 1:
The patent segments the CSI-RS resource configurations into multiple distinct configurations within a set, each potentially optimized for different channel conditions. The terminal selects from these segmented configurations based on current channel state, allowing the system to maintain simple periodic feedback operations while adapting to varying channel conditions through configuration selection.
Solution Approach 2:
The patent enables parameter changes by allowing different CSI-RS resource configurations with varying parameters (such as time-frequency resources, port configurations) to be selected dynamically. The terminal determines which configuration to use based on channel conditions, thereby changing system parameters adaptively while keeping the overall feedback mechanism simple and periodic.
3Adaptability or versatility
If multiple CSI-RS configurations are provided for terminal selection, then the adaptability to channel changes is improved, but the configuration complexity and overhead increase
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure multiple CSI-RS resource configurations in advance through RRC signaling before the terminal needs to select among them. This preliminary configuration reduces real-time complexity as the terminal only needs to select from pre-prepared options rather than creating configurations dynamically, thus improving adaptability while controlling complexity.
Data Source
AI summary
Disclosed are a channel state information (CSI) based processing method, and a terminal, a base station and a computer storage medium. The method comprises: a terminal acquiring channel measurement process configuration information, wherein at least one CSI process configuration includes configuring M sets of channel state information reference symbols (CSI-RSs) for channel measurement, with M being an integer greater than or equal to 1; and the terminal determining m sets of CSI-RSs for CSI measurement, wherein the m sets of CSI-RSs are a sub-set of the M sets of CSI-RSs, with m being an integer.