5G NR CSI Acquisition with CDM-Based Antenna Port Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and reducing complexity in the transmission and reception of channel state information (CSI) due to the complexity of antenna port management and resource allocation, particularly in 5G NR networks.
Innovation Solution
The system identifies antenna ports using code division multiplexing (CDM) groups and code sequences, resource blocks, and codebooks to optimize CSI-RS transmission and reception, reducing measurement errors and complexity by defining specific configurations and reporting types, such as wideband, subband, or hybrid reporting, and omitting unnecessary amplitude information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If code division multiplexing and resource block identification methods are used to identify antenna ports, then antenna port management efficiency is improved, but system complexity increases due to multiple identification parameters
Solution Approach 1:
The patent segments the antenna port identification process into distinct methods: CDM group-based identification, resource block-based identification, and codebook-type-based identification. Each segmentation approach handles specific scenarios independently, improving management efficiency while containing complexity within each segment rather than requiring all parameters simultaneously.
Solution Approach 2:
The patent applies partial action by allowing the system to use only the necessary identification parameters for each specific CSI-RS transmission scenario. Rather than requiring all three identification methods (CDM group, resource block, codebook type) for every antenna port, the system selectively applies the appropriate identification method based on the transmission configuration, thereby reducing overall system complexity while maintaining management efficiency.
2Measurement precision
If comprehensive CSI reporting including all antenna ports is implemented, then measurement precision is improved, but information loss increases due to resource constraints
Solution Approach 1:
The patent extracts and reports only the essential CSI parameters needed for effective communication. Rather than transmitting complete CSI data for all antenna ports, the system extracts key information such as precoding matrix indicators and channel quality indicators, achieving sufficient measurement precision while minimizing information loss through selective reporting.
Solution Approach 2:
The system implements partial reporting by transmitting CSI information for a subset of antenna ports or selected channel characteristics rather than comprehensive reporting for all parameters. This partial action approach maintains adequate measurement precision for system operation while reducing the volume of transmitted information and avoiding resource exhaustion.
3Adaptability or versatility
If configuration information for maximum antenna ports is transmitted, then adaptability is improved, but device complexity increases due to additional configuration parameters
Solution Approach 1:
The patent implements universal configuration parameters that can accommodate multiple antenna port scenarios. The maximum number of antenna ports configuration and reporting type settings serve multiple functions: they define resource allocation, determine reporting formats, and adapt to different transmission modes. This multi-functionality approach provides broad adaptability while minimizing the number of separate configuration parameters needed.
4Measurement precision
If CSI-RS is transmitted through multiple antenna ports, then channel state information accuracy is improved, but use of energy increases due to multiple transmission resources
Solution Approach 1:
The system transmits CSI-RS through a selected subset of antenna ports rather than all available ports simultaneously. By applying partial action, the system achieves sufficient channel state information accuracy for effective communication while reducing the total number of transmission resources required, thereby lowering energy consumption compared to full-portfolio antenna port transmission.
Data Source
AI summary
Presented are systems and methods for acquiring channel state information. A wireless communicate node may transmit a channel state information reference signal (CSI-RS) to a wireless communication device via a first antenna port of a plurality of antenna ports of the wireless communication node. The wireless communication node may receive a channel state information (CSI) report from the wireless communication device.