RS Linkage-Based Downlink Reception With Spatial Parameter Mapping
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently managing downlink transmission and reception due to the increasing demand for higher data rates, larger device connectivity, low latency, and energy efficiency, necessitating improved methods for reference signal linkage and resource management.
Innovation Solution
A method and apparatus for performing downlink transmission and reception based on reference signal (RS) linkage, including configuring RS linkage candidates, activating or indicating RS linkages, determining target RS resources, and applying spatial parameters in a wireless communication system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference signal linkage is configured to map reference RS resources to target RS resources, then adaptability to changing channel conditions is improved, but device complexity increases due to additional configuration and management requirements
Solution Approach 1:
The base station pre-configures multiple reference signal linkage candidates including reference RS resources and corresponding target RS resources before actual transmission. This preliminary configuration allows the UE to quickly select appropriate linkages without complex real-time processing, resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The reference signal linkage configuration enables dynamic adaptation to changing channel conditions by allowing the base station to indicate different target RS resources based on current channel state. The system transitions from static RS configuration to dynamic linkage-based configuration, improving adaptability while managing complexity through standardized procedures
2Measurement precision
If spatial parameter information is transmitted for each target RS resource, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and transmits only the essential spatial parameter information (QCL parameters) needed for accurate measurement, rather than complete RS configuration details. This selective extraction maintains measurement precision while reducing signaling overhead by transmitting only the critical parameters
Solution Approach 2:
The UE copies spatial parameter information from the reference RS resource configuration to the target RS resource. Instead of receiving duplicate complete configurations, the UE reuses the reference spatial parameters and applies them to target resources, reducing signaling overhead while maintaining measurement precision through parameter inheritance
Data Source
AI summary
Disclosed are a method and a device for performing a downlink transmission or reception on the basis of reference signal linkage in a wireless communication system. According to an embodiment of the present disclosure, a method for performing a downlink reception by a terminal in a wireless communication system may comprise: a reference signal (RS) linkage information reception step of receiving information on RS linkage from a base station, wherein the RS linkage includes information on a mapping relationship between a reference RS resource and one or more target RS resources; a step of receiving, from the base station, information on a first spatial parameter for the reference RS resource related to specific RS linkage; and a step of performing the downlink reception on the basis of a second spatial parameter corresponding to the first spatial parameter with respect to a specific target transmission or reception among one or more target transmissions or receptions mapped to a reference transmission or reception related to the specific RS linkage.