CSI-RS Configuration for 2D Antenna Arrays
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring Channel Status Information Reference Signals (CSI-RS) for two-dimensional antenna configurations, particularly in managing increased signaling overhead and efficiently transmitting CSI-RS resources across multiple antenna ports.
Innovation Solution
The proposed solution involves a method and apparatus for configuring CSI-RS resources in both horizontal and vertical directions, where user equipment receives CSI-RS configuration information from the base station, extracts necessary parameters for vertical antenna CSI-RS, and transmits/receives CSI-RS accordingly, optimizing the number of antenna ports and patterns to reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two-dimensional antenna configuration is implemented to support more transmission antenna ports, then the channel status estimation accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent segments the two-dimensional antenna configuration into horizontal and vertical components. The base station transmits separate indication information for horizontal antenna ports and vertical antenna ports, allowing the user equipment to reconstruct the full two-dimensional configuration. This segmentation reduces signaling overhead by transmitting only necessary parameters rather than complete configuration details.
Solution Approach 2:
The patent transitions from one-dimensional antenna configuration to two-dimensional configuration by adding the vertical dimension to the existing horizontal antenna ports. This allows support for more transmission antenna ports (up to 64) while maintaining efficient signaling through separate indication of horizontal and vertical dimensions rather than exhaustive configuration signaling.
2Productivity
If the number of transmission antenna ports is increased to 64 in two-dimensional configuration, then the data rate and channel capacity are improved, but the device complexity increases
Solution Approach 1:
The patent divides the 64 antenna ports into horizontal and vertical segments. The base station indicates the number of horizontal antenna ports and vertical antenna ports separately, and provides indication information for CSI-RS resources in each dimension. This segmentation simplifies the configuration management compared to handling all 64 ports as a single complex configuration.
Solution Approach 2:
The patent enables dynamic configuration of horizontal and vertical antenna ports independently. The base station can flexibly adjust the number of horizontal antenna ports and vertical antenna ports based on channel conditions and service requirements, allowing adaptive optimization of data rate while managing device complexity through on-demand configuration activation.
Data Source
AI summary
The terminal receives channel status information reference signals (CSI-RSs) transmitted from a base station. The terminal includes a configuration information receiving unit for receiving, from the base station, CSI-RS configuration information which includes a number of CSI-RS antenna ports for a horizontal antenna in an antenna array of the base station and information indicating a CSI-RS pattern for the horizontal antenna in a particular subframe, a configuration identification unit for extracting a number of CSI-RS antenna ports for a vertical antenna and a CSI-RS pattern for the vertical antenna, based on the number of CSI-RS antenna ports for the horizontal antenna and the information indicating CSI-RS pattern for the horizontal antenna, when it is determined that a CSI-RS for the vertical antenna is transmitted, and a reference signal reception unit for receiving the CSI-RS for the horizontal antenna and the CSI-RS for the vertical antenna.