QCL Configuration for Massive MIMO Antenna Ports
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring Quasi Co-Location (QCL) between antenna ports for massive Multiple Input Multiple Output (MIMO) applications, which is essential for enhancing signal reception and transmission efficiency.
Innovation Solution
The method involves transmitting and receiving Reference Signal (RS) information to User Equipment (UE) through a high layer, indicating whether quasi co-location is possible between RSs, allowing the UE to assume shared large-scale properties such as Doppler spread and delay spread, and configuring CSI-RS resources across multiple antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If QCL is configured between antenna ports for massive MIMO, then signal reception and transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the antenna ports into different groups based on their spatial relationship and QCL properties. By dividing the massive MIMO antenna system into manageable segments with distinct QCL configurations, the patent enables efficient signal processing while reducing the complexity of managing all antenna ports uniformly.
Solution Approach 2:
The patent applies local quality by configuring QCL parameters specifically for each antenna port or group of ports based on their individual characteristics and spatial location. This allows optimized signal reception for each local region while avoiding the need to manage all antenna ports with identical complex parameters.
2Measurement precision
If multiple RSs are configured with QCL assumptions, then channel estimation accuracy is improved, but configuration complexity increases
Solution Approach 1:
The patent establishes a universal QCL assumption framework that can be applied across multiple Reference Signals (RSs). By defining QCL relationships between different RS types (e.g., CRS, CSI-RS, DMRS), the patent enables accurate channel estimation for various transmission scenarios using a unified configuration approach, reducing the need for separate complex settings for each RS type.
3Adaptability or versatility
If QCL information is transmitted through high layer signaling, then configuration flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent performs preliminary configuration of QCL assumptions through high layer signaling during system setup or reconfiguration. By establishing QCL relationships in advance before actual data transmission, the patent enables flexible adaptation to different transmission scenarios while minimizing real-time signaling overhead, as the QCL parameters are pre-configured and can be directly applied during communication.
Data Source
AI summary
A method for receiving a Reference Signal (RS) at a User Equipment (UE) in a wireless communication system is disclosed. The method includes receiving information about a plurality of RSs through a high layer, and receiving the RS based on the information about the plurality of RSs from at least one node. The information about the plurality of RSs includes information indicating whether it is possible to assume quasi co-location between at least two RSs of the plurality of RSs.