QCL Beam Measurement Alignment for Reliable 5G NR Links
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Solution Overview
Problem
In high-frequency 5G NR communication, managing quasi co-located (QCL) relationships between network and terminal side devices is challenging due to the use of multiple beam measurement quantities, leading to misalignment in beam management and communication reliability issues.
Innovation Solution
A method and apparatus for quasi co-located relationship management that aligns the behavior of terminal and network side devices by determining and managing QCL relationships based on one or multiple measurement quantities such as RSRP and SINR, enabling operations like establishing, updating, and discarding these relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple beam measurement quantities (RSRP and SINR) are used for managing QCL relationships, then beam quality assessment is improved, but behavior alignment between terminal and network side devices deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically selecting different measurement quantities (RSRP or SINR) based on the QCL relationship type. For QCL-TypeA relationships, SINR is used for measurement, while for QCL-TypeD relationships, RSRP is used. This parameter selection approach allows the system to utilize multiple measurement quantities for improved beam quality assessment while maintaining behavior alignment between terminal and network side devices through type-specific measurement protocols.
2Measurement precision
If multiple measurement quantities are used for beam training, then beam quality measurement is improved, but determination of transmit-receive beams deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the beam training process into distinct segments based on QCL relationship types. The terminal device performs beam training and measurement separately for different QCL types (TypeA and TypeD), with each segment using the appropriate measurement quantity. This segmentation approach enables the system to utilize multiple measurement quantities for comprehensive beam quality assessment while simplifying beam determination by handling each QCL type independently with its designated measurement method.
Data Source
AI summary
This application discloses a quasi co-located relationship management method and apparatus. In this application, a terminal side device and a network side device determine one or a plurality of measurement quantities for managing a quasi co-located relationship, and manage or use the quasi co-located relationship based on the determined one or plurality of measurement quantities. According to the solutions of this application, when there are the plurality of measurement quantities, both the terminal side device and the network side device manage or use the quasi co-located relationship based on the determined one or plurality of measurement quantities, so that behavior of the terminal side device and behavior of the network side device can be aligned. This improves communication reliability.