CSI Reporting for Optimal Antenna Port Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in determining optimal antenna port configurations for efficient data signal transmission to specific user equipment (UE) in wireless communication systems.
Innovation Solution
A method and apparatus for reporting channel state information (CSI) between a user equipment (UE) and a base station, involving multiple CSI processes to determine optimal antenna port configurations, including calculating and reporting CSI based on configuration information received from the base station, allowing for efficient data signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a base station uses multiple antenna ports for data transmission, then the data transmission capacity and coverage are improved, but it becomes difficult to determine optimal antenna port configurations for specific UEs
Solution Approach 1:
The patent segments the determination of antenna port configurations into multiple independent CSI processes. Each CSI process evaluates a specific antenna port configuration (e.g., different numbers of antenna ports, different antenna port indices) separately. The base station configures multiple CSI processes with different antennaPortConfigs, and the UE reports CSI for each process independently, allowing the base station to compare and select the optimal configuration without having to evaluate all possible configurations simultaneously.
Solution Approach 2:
The patent changes the parameter of antenna port configuration by defining multiple CSI processes with different antennaPortConfig values. Each CSI process is associated with a specific antenna port configuration parameter set. By varying these parameters across different CSI processes, the system enables the base station to determine optimal antenna port configurations for data transmission to specific UEs based on reported CSI feedback.
2Measurement precision
If the base station configures multiple CSI processes with different antenna port configurations, then the ability to determine optimal configurations is improved, but the signaling overhead and processing complexity increase
Solution Approach 1:
The base station performs preliminary action by pre-configuring multiple CSI processes with different antenna port configurations before actual data transmission. The CSI processes are set up in advance with specific antennaPortConfigs, CSI RS resource configurations, and other parameters. This allows the UE to prepare and report CSI feedback for multiple configurations ahead of time, so the base station already has the necessary information when needing to determine optimal antenna port configurations for data transmission.
3Measurement precision
If the UE reports CSI for multiple antenna port configurations, then the base station can make better transmission decisions, but the uplink feedback overhead increases
Solution Approach 1:
The patent extracts only the necessary CSI feedback information for each antenna port configuration from the complete set of possible measurements. Instead of requiring the UE to report all possible channel parameters for all antenna configurations, the system configures specific CSI processes that focus on particular antenna port configurations. The UE reports extracted CSI (such as CQI, PMI, RI) for each configured CSI process, reducing the total feedback overhead while still providing the base station with sufficient information to make optimal transmission decisions.
Data Source
AI summary
Disclosed are a method for transmitting and receiving channel state information between a base station and a terminal and an apparatus for supporting the same. Specifically, disclosed is a method for reporting channel state information of a specific terminal in order to determine an optimal antenna port setting (number, index, etc.) for transmitting, by a base station, a data signal to the terminal. More particularly, disclosed are a method for reporting, by a terminal, channel state information on different antenna port settings (number, index, etc.) to a base station and an apparatus for supporting the same.