CSI Report Sub-Report Segmentation for 5G Adaptation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reporting channel state information (CSI) for joint transmission with adaptation hypotheses, particularly in 5G/NR communication systems operating in higher frequency bands like mmWave.
Innovation Solution
The method involves a user equipment (UE) receiving information related to a CSI-RS resource set, including non-zero power CSI-RSs, and determining CSI report sub-configurations. The UE then transmits CSI reports with multiple sub-reports based on the received information, allowing for adaptation hypotheses such as TRP on/off and spatial domain adaptations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional CSI reporting methods are used, then the reporting process is simple, but the system cannot efficiently support joint transmission with adaptation hypotheses in 5G/NR systems
Solution Approach 1:
The CSI report is divided into multiple sub-reports, each corresponding to different adaptation hypotheses (e.g., TRP on/off, spatial domain adaptations). This segmentation allows the UE to report channel state information for multiple transmission scenarios separately, making the system adaptable to different joint transmission configurations without overwhelming complexity in a single report structure.
Solution Approach 2:
The CSI reporting mechanism is made dynamic by allowing the UE to determine the number of sub-reports based on received configuration information and actual reception conditions. The UE can adaptively adjust the CSI report structure according to network conditions, enabling flexible support for various adaptation hypotheses while maintaining manageable reporting complexity.
2Productivity
If multiple CSI report sub-configurations are processed, then network energy savings and adaptation efficiency improve, but processing time and computational load increase
Solution Approach 1:
The network provides configuration information in advance that includes the first number of CSI report sub-configurations and parameters for determining the second number of CSI sub-reports. This preliminary configuration allows the UE to prepare and structure CSI reports efficiently without needing to perform complex real-time analysis, thereby improving processing efficiency while controlling time consumption.
Solution Approach 2:
The UE determines the number of CSI sub-reports based on feedback information received from the network (second information related to CSI report, reception of NZP CSI-RS). This feedback mechanism enables the UE to adjust the reporting detail level dynamically, ensuring that processing time is optimized by reporting only the necessary number of sub-reports required for effective network adaptation.
3Loss of energy
If TRP activation and spatial domain configurations are dynamically adjusted, then network energy savings increase, but CSI reporting complexity increases
Solution Approach 1:
The CSI report structure is segmented into sub-reports that correspond to different TRP activation hypotheses and spatial domain configurations. Each sub-report handles a specific adaptation scenario independently, which simplifies the overall complexity by breaking down the comprehensive reporting task into manageable units while still supporting dynamic network energy optimization.
Solution Approach 2:
The UE determines the number and configuration of CSI sub-reports based on parameter information received from the network (first number of CSI report sub-configurations, second number of CSI sub-reports). This parameter-based configuration allows the reporting structure to adapt to different TRP activation and spatial domain scenarios without requiring complex manual configuration, thereby reducing structural complexity while enabling energy-efficient network operation.
Data Source
AI summary
Apparatuses and methods for channel state information (CSI) for joint transmission with adaptation hypotheses. A method for a user equipment (UE) to report channel state information (CSI) includes receiving: information related to a CSI reference signal (CSI-RS) resource set including one or more non-zero power CSI-RSs (NZP CSI-RSs) on a cell, information related to a CSI report including a first number of CSI report sub-configurations, information related to an uplink (UL) channel for transmitting the CSI report, and the one or more NZP CSI-RSs. The method further includes determining a second number of CSI sub-reports based on the reception of the one or more NZP CSI-RSs and transmitting the UL channel with the CSI report including the second number of CSI sub-reports based on the fourth information.