5G NR Tracking Reference Signal Burst Configuration
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Solution Overview
Problem
The framework for tracking reference signals in 5G New Radio (NR) networks is not fully defined, particularly for user equipment (UE) in radio resource control (RRC) connected mode, which affects channel estimation, synchronization, and frequency tracking.
Innovation Solution
A method and apparatus for a UE to receive and process a tracking reference signal (TRS) burst from a base station, involving parameters like TRS burst length, periodicity, and subcarrier spacing, to perform channel estimation, synchronization, time tracking, and frequency tracking, with specific configurations for TRS symbol spacing and multiplexing with other reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TRS framework is defined using CSI-RS resource set with NZP CSI-RS resources, then channel estimation capability is improved, but framework completeness and reliability for 5G NR networks deteriorates due to undefined aspects
Solution Approach 1:
The patent segments the TRS framework into distinct configurable parameters including TRS burst length, periodicity, subcarrier spacing, and symbol spacing. This segmentation allows each parameter to be independently optimized and defined, providing a complete and reliable framework while maintaining precise channel estimation capabilities.
Solution Approach 2:
The patent introduces dynamic configurability for TRS parameters, allowing the network to adapt TRS burst length, periodicity, and other parameters based on channel conditions and service requirements. This dynamic approach ensures framework completeness for various 5G NR scenarios while preserving channel estimation precision through optimized parameter selection.
2Measurement precision
If TRS burst configurations are optimized for channel estimation, then measurement precision is improved, but device complexity increases due to multiple configuration parameters
Solution Approach 1:
The patent designs the TRS configuration framework to be universal across different 5G NR scenarios. By defining a set of configurable parameters that can be adapted to various channel conditions and service types, the system achieves high measurement precision without requiring separate complex configurations for each scenario. The same parameter set serves multiple functions including channel estimation, synchronization, and frequency tracking.
Solution Approach 2:
The patent implements a tiered configuration approach where essential TRS parameters are always configured, while additional parameters are only configured when needed for specific scenarios. This partial configuration strategy reduces device complexity for basic operations while maintaining the capability for precise channel estimation when full configuration is applied.
3Productivity
If TRS symbols are multiplexed with other reference signals, then resource utilization is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent applies local quality by assigning different properties to TRS symbols based on their multiplexing context. When TRS is multiplexed with other reference signals, specific detection parameters and processing methods are applied locally to handle the combined signal characteristics. This allows efficient resource utilization through multiplexing while maintaining simple detection through context-aware processing.
Data Source
AI summary
Techniques and examples of tracking reference signal and framework thereof in mobile communications are described. A user equipment (UE) receives, from a base station of a network, a reference signal via a communication link between the UE and the base station. The reference signal contains resource configuration with respect to tracking reference signal (TRS) configuration. The UE also receives, from the base station, a TRS burst containing a plurality of TRS symbols with one or more components of the UE configured according to the TRS configuration. The UE processes the TRS burst to perform channel estimation, synchronization, time tracking, frequency tracking, or a combination thereof.