QCL Reference Signal Configuration for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing downlink signals, particularly in configuring reference signals for multiple Transmission Reception Points (TRPs) and accommodating varying terminal capabilities, which affects data transmission rates and latency.
Innovation Solution
A method and apparatus for transmitting and receiving downlink signals that involve terminals reporting their capability information regarding supported quasi-co-location (QCL) reference signals, allowing base stations to configure appropriate QCL RSs for efficient signal transmission and reception, optimizing signal processing based on the number of activated receiving means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple QCL RSs are configured for multiple TRPs, then downlink signal reception reliability is improved, but terminal capability management complexity increases
Solution Approach 1:
The system dynamically adjusts QCL RS configuration based on terminal capability information. The base station determines the number of second type QCL RSs to configure according to the terminal's activated receiving means, creating a dynamic adaptation mechanism that balances reliability improvement with complexity management.
Solution Approach 2:
The patent changes the parameter of QCL RS configuration quantity based on terminal capability. By varying the number of configured QCL RSs according to terminal receiving means capacity, the system optimizes the balance between reception reliability and management complexity.
2Productivity
If QCL RS configuration is optimized for multiple TRPs, then data transmission rate is improved, but signal processing complexity increases
Solution Approach 1:
The system applies different QCL RS configuration strategies to different terminals based on their individual capabilities. Each terminal receives customized QCL RS configuration appropriate to its receiving means capacity, optimizing data transmission rate while managing signal processing complexity at the terminal level.
3Adaptability or versatility
If capability information is exchanged between terminal and base station, then system adaptability is improved, but signaling overhead increases
Solution Approach 1:
The terminal autonomously determines and reports its capability information regarding the number of second type QCL RSs it can support based on its activated receiving means. This self-service approach enables system adaptability while minimizing the need for extensive base station processing and reducing signaling overhead.
Data Source
AI summary
A method and an apparatus of transmitting and receiving a downlink signal in a wireless communication system is disclosed. A method of receiving a downlink signal by a terminal in a wireless communication system according to an embodiment of the present disclosure includes: transmitting capability information of the terminal to a base station, wherein the capability information includes information related to a number of second type quasi-colocation reference signal (QCL RS) supported by the terminal based on a number of activated receiving means of the terminal, receiving, from the base station, configuration information for a plurality of first type QCL RSs and at least one second type QCL RS and receiving the downlink signal based on the configuration information, and based on the number of second type QCL RS being 1, the downlink signal may be received based on one specific second type QCL RS among the at least one second type QCL RS.