Base Station Downlink Reference Signal Configuration for MIMO Spatial Dimensions
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Solution Overview
Problem
Current MIMO communication systems face challenges in efficiently utilizing the vertical dimension with two-dimensional active antenna arrays, leading to increased signaling overhead and complexity due to the need for additional antenna ports and redesigned signaling mechanisms.
Innovation Solution
The implementation of an apparatus and method that configures downlink reference signals in multiple spatial dimensions, allowing for independent configuration and measurement feedback, which reduces signaling overhead and complexity, and enables effective utilization of spatial resources by distinguishing between horizontal and vertical dimensions using different transmission resources and feedback schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two-dimensional active antenna arrays are introduced to utilize the vertical dimension in MIMO systems, then spatial resource utilization is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent segments the two-dimensional antenna array into separate horizontal and vertical beamforming components. The base station independently configures downlink reference signals for horizontal dimensions and vertical dimensions, allowing the system to utilize spatial resources in both dimensions while managing complexity through separate handling of each dimension's signaling and measurement feedback.
2Adaptability or versatility
If more antenna ports are defined for vertical dimension, then spatial resource utilization is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the antenna port configuration into horizontal and vertical components. Different antenna ports are assigned to different spatial dimensions, allowing independent configuration and management of each dimension's antenna resources without requiring a complete redesign for the two-dimensional system.
Solution Approach 2:
The patent extends the traditional one-dimensional antenna array concept to two dimensions by introducing vertical beamforming capabilities. This dimensionality change enables the system to exploit both horizontal and vertical spatial variations, improving spatial resource utilization while maintaining manageable complexity through separate dimension handling.
3Measurement precision
If channel state information reference signal is redesigned for vertical dimension, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the channel state information reference signal into separate horizontal and vertical components. The base station configures downlink reference signals independently for each spatial dimension, enabling precise channel estimation in both dimensions while reducing overall signaling overhead by avoiding redundant signaling across dimensions.
Data Source
AI summary
A wireless communication device and method used in a base station side and a user equipment side. The wireless communication device used in the base station includes one or more processors configured to respectively configure, based on an antenna configuration of a base station and on a plurality of spatial dimensions, a downlink reference signal of the base station, and generate a control message comprising an indication indicating that the base station respectively transmits, on the plurality of spatial dimensions, the downlink reference signal, so as to be used in a user equipment served by the base station.