CSI-RS Resource Set Configuration for Precise Time-Frequency Tracking
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Solution Overview
Problem
Existing mobile communication systems face challenges in providing high-speed data services due to resource shortages and the need for advanced techniques to support increased data traffic, user connections, low latency, and energy efficiency, particularly in designing reference signals for time/frequency tracking.
Innovation Solution
A method is proposed for configuring and transmitting a CSI-RS resource set with a single antenna port for time/frequency tracking, using periodic CSI-RS resources in a wireless communication system, without code division multiplexing, and ensuring quasi-co-location with other reference signals for precise time/frequency tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antenna ports are used for CSI-RS resources, then channel diversity and reliability are improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments the CSI-RS resource set into multiple individual CSI-RS resources, each with its own antenna port configuration. This allows the UE to process each resource separately and report channel state information for each, providing fine-grained channel diversity while maintaining manageable processing complexity through structured resource organization.
Solution Approach 2:
The patent introduces a new dimension of resource configuration by defining CSI-RS resources with specific antenna port indices and associations with PDSCH antenna ports. This dimensional expansion allows the system to achieve reliability through multi-antenna diversity while organizing the complexity into a structured multi-dimensional resource framework that simplifies UE processing.
2Productivity
If code division multiplexing is applied to CSI-RS resources, then resource utilization efficiency is improved, but measurement precision and tracking accuracy deteriorate
Solution Approach 1:
The patent extracts the time/frequency tracking function into a dedicated CSI-RS resource configuration that is separate from data transmission resources. By allocating specific CSI-RS resources exclusively for tracking purposes with dedicated antenna ports, the system removes tracking measurements from the multiplexed resource pool, ensuring high measurement precision while maintaining overall resource utilization efficiency through specialized resource allocation.
3Adaptability or versatility
If CSI-RS resources are configured with different periodicities, then adaptability to different channel conditions is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent implements dynamic resource configuration by allowing different CSI-RS resources within the same resource set to have different periodicities. This enables the system to adapt to varying channel conditions by adjusting the periodicity of specific resources based on channel volatility, while the unified resource set structure maintains manageable configuration complexity through hierarchical organization.
Solution Approach 2:
The patent applies local quality by allowing individual CSI-RS resources within a resource set to have differentiated configurations including different periodicities, antenna ports, and associations. This enables tailored optimization for specific channel conditions or transmission scenarios while maintaining overall system coherence through the unified resource set framework, balancing adaptability with configuration simplicity.
Data Source
AI summary
Disclosed is a method for transmitting and receiving a channel state information (CSI)-reference signal (RS) in a wireless communication system.Specifically, the method performed by a base station may include: configuring control information indicating that an antenna port for all CSI-RS resources included in a CSI-RS resource set is same, wherein the CSI-RS resource set is used for tracking at least one of a time or a frequency; transmitting the configured control information to a user equipment (UE); and transmitting the CSI-RS to the UE through all the CSI-RS resources.In doing so, the UE is capable of performing time/frequency tracking more precisely.