PT-RS Overhead Reduction via Adaptive Time-Frequency Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, existing methods for receiving phase tracking reference signals (PT-RS) are inefficient, leading to increased overhead and reduced spectral efficiency due to suboptimal time and frequency density configurations of PT-RS ports.
Innovation Solution
A method for determining the highest time density among PT-RS ports allocated to user equipment (UE) and receiving PT-RSs accordingly, with power boosting applied to all PT-RS ports to reduce overhead, while adjusting frequency densities based on bandwidth and power boosting levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PT-RS ports are configured with higher time density to improve channel estimation accuracy, then reliability is improved, but overhead increases and spectral efficiency deteriorates
Solution Approach 1:
The patent applies different time density configurations to different PT-RS ports based on their specific requirements. Instead of uniformly configuring all PT-RS ports with the same time density, the system allows each port to have optimized local characteristics, enabling high reliability where needed while reducing overall overhead.
Solution Approach 2:
The patent dynamically adjusts the time density parameter of PT-RS ports based on channel conditions, modulation and coding schemes (MCS), and traffic requirements. By changing this parameter adaptively, the system achieves high channel estimation accuracy when necessary while minimizing overhead in other scenarios.
2Reliability
If PT-RS ports are configured with higher frequency density to improve channel estimation accuracy, then reliability is improved, but spectral efficiency deteriorates
Solution Approach 1:
The patent configures different frequency density levels for different PT-RS ports according to their specific channel characteristics and service requirements. This localized optimization ensures high reliability for ports needing it while maintaining high spectral efficiency for others.
Solution Approach 2:
The system dynamically changes the frequency density parameter of PT-RS ports based on instantaneous channel conditions, MCS levels, and bandwidth allocations. This adaptive parameter adjustment resolves the contradiction between reliability and spectral efficiency.
3Productivity
If power boosting is applied to all PT-RS ports to reduce overhead, then spectral efficiency is improved, but complexity of power management increases
Solution Approach 1:
The patent applies power boosting selectively to certain PT-RS ports rather than all ports. By applying this action partially based on specific criteria such as port index, channel conditions, and service requirements, the system improves spectral efficiency while avoiding excessive complexity.
Data Source
AI summary
The present invention discloses a method of receiving a phase tracking reference signal by a user equipment in a wireless communication system and device for supporting the same.