Antenna Configuration Notification in 3D MIMO Systems
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Solution Overview
Problem
In 3D MIMO wireless communication systems, existing technologies lack an effective method to notify user equipment (UE) of the base station's antenna configuration, leading to inefficiencies in channel estimation and transmission performance due to the introduction of a vertical dimension and 2D antenna arrays, which differ from conventional systems.
Innovation Solution
The proposed solution involves determining and transmitting antenna configuration information, specifically the number of transceiver units (TXRUs), via Radio Resource Control (RRC) signaling to enable the UE to conform to the base station's configuration, improving transmission efficiency by explicitly or implicitly conveying this information through codebook subset restrictions and CSI-RS configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 2D antenna array is introduced in 3D MIMO system, then transmission performance is improved, but device complexity increases due to multiple antenna configurations and variable TXRU combinations
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting antenna configuration parameters (number of TXRUs, antenna elements per TXRU, polarization directions) to optimize transmission performance for different channel conditions and service requirements, thereby improving reliability while managing complexity through controlled parameter variation
Solution Approach 2:
The patent implements dynamics by enabling flexible and dynamic antenna configuration where the base station can adaptively select different TXRU combinations and antenna element arrangements based on real-time channel state information and traffic demands, allowing the system to transition between different configuration states to maintain optimal performance
2Productivity
If different antenna configurations are used, then transmission efficiency is improved, but information loss occurs as UE cannot accurately estimate channels without proper configuration notification
Solution Approach 1:
The patent applies feedback by implementing a mechanism where the base station notifies the UE of the actual antenna configuration through RRC signaling, and the UE provides channel state information feedback based on this configuration, enabling accurate channel estimation and maintaining transmission efficiency through closed-loop adaptation
Solution Approach 2:
The patent uses RRC signaling as an intermediary to transmit antenna configuration information from the base station to the UE, ensuring that the configuration details (number of TXRUs, antenna elements, polarization) are accurately conveyed without information loss, thereby enabling the UE to properly estimate channels
3Device complexity
If original notification unit for 1D antenna array is used, then device complexity is reduced, but measurement precision deteriorates because it is no longer applicable to 2D wireless array
Solution Approach 1:
The patent applies dimensionality change by extending the notification mechanism from 1D antenna array parameters to 2D antenna array parameters, incorporating additional dimensions such as vertical antenna elements, polarization directions, and TXRU groupings, thereby enabling accurate channel measurement for 3D MIMO while maintaining a systematic notification approach
Data Source
AI summary
An electronic apparatus and radio communication method in a radio communication system. The electronic apparatus includes: one or more processing circuits configured to execute the following operations: determining, based on an antenna array corresponding to the electronic apparatus, corresponding a transceiver unit (TXRU) configuration, wherein each TXRU is associated with one set of antenna units having a same polarization direction, the antenna array includes plural antenna units having M rows, N columns and P-dimensional polarization directions, and M, N and P are natural numbers; and adding antenna configuration information to a radio resource control (RRC) signaling to be use in a user equipment (UE) in the radio communication system, wherein the antenna configuration information is used to obtain a number of the TXRU in the antenna configuration.