CSI-RS Density Segmentation for Wireless Time Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of user equipment (UEs) and the demand for higher data transmission in wireless communication systems pose challenges in efficiently managing limited radio resources, particularly in reducing latency and handling small volumes of data, while supporting new radio access technologies using high-frequency bands.
Innovation Solution
The method involves transmitting and receiving channel state information reference signals (CSI-RS) with varying densities, including low-density and high-density configurations, to enable efficient beam measurement and time tracking, thereby optimizing resource utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-density CSI-RS is transmitted for time tracking, then time tracking accuracy is improved, but resource overhead increases
Solution Approach 1:
The patent segments the CSI-RS transmission into two distinct types: low-density CSI-RS for beam measurement and high-density CSI-RS for time tracking. This segmentation allows each type to be optimized for its specific function, with high-density CSI-RS providing accurate time tracking information only where needed, rather than transmitting high-density signals across all scenarios.
Solution Approach 2:
The patent applies local quality by transmitting high-density CSI-RS only in specific time-frequency resources dedicated to time tracking, while using low-density CSI-RS for other purposes. This ensures that the high measurement precision is localized to where it is most needed (time tracking) without unnecessarily increasing resource overhead system-wide.
2Quantity of substance
If low-density CSI-RS is transmitted for beam measurement, then resource overhead is reduced, but beam measurement accuracy may be insufficient
Solution Approach 1:
The patent segments the CSI-RS functionality by creating separate low-density and high-density configurations. The low-density CSI-RS is specifically designated for beam measurement tasks, providing sufficient accuracy for this purpose while consuming fewer resources compared to using high-density CSI-RS for all functions.
Solution Approach 2:
The patent changes the density parameter of CSI-RS based on the specific measurement task. For beam measurement, a lower density configuration is used which is sufficient for the required accuracy level, thereby reducing resource overhead while maintaining adequate measurement precision.
3Productivity
If multiple UEs are served in the same resource region, then system throughput is improved, but interference management becomes more difficult
Solution Approach 1:
The patent makes the CSI-RS configuration universal by defining a standardized framework that supports both low-density and high-density transmissions. This multi-functional approach allows the same CSI-RS mechanism to serve multiple UEs with different requirements (beam measurement vs. time tracking) without requiring separate specialized systems, thereby improving throughput while managing interference through standardized procedures.
Data Source
AI summary
A base station transmits low-density configuration information and high-density configuration information on a channel state information-reference signal (CSI-RS) of a beam. A user equipment performs beam measurement, using a CSI-RS received on the basis of the low-density configuration information (hereinafter, a low-density CSI-RS), and performs time tracking, using a CSI-RS received on the basis of the high-density configuration information (hereinafter, a high-density CSI-RS). At least in a frequency domain, the high-density CSI-RS is configured to have a higher density than that of the low-density CSI-RS.