PTRS Frequency Position Determination in Multi-TRP Systems
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Solution Overview
Problem
In multi-TRP scenarios, the presence of noise, especially phase noise at high frequencies, affects communication quality, and existing protocols do not specify how to determine the time-frequency resource positions of Phase Tracking Reference Signals (PTRS) for multiple transmission and reception points.
Innovation Solution
A method and device for determining the frequency domain position of PTRS resources in a multi-TRP scenario by acquiring indication information and using a predefined mapping relationship to determine the positions of downlink and uplink PTRSs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PTRS resources are configured for multiple TRPs in multi-TRP scenarios, then phase noise tracking capability is improved, but resource position determination becomes uncertain and complex
Solution Approach 1:
The patent applies parameter changes by modifying the frequency domain position parameters of PTRS resources based on different TCI states. Each TCI state (first and second) is associated with different beam-related information, which determines distinct frequency domain positions for PTRS. This allows the system to adapt PTRS positioning parameters according to the specific multi-TRP configuration, resolving the uncertainty in resource position determination while maintaining reliable phase noise tracking across multiple TRPs.
2Adaptability or versatility
If indication information is used to determine PTRS positions, then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent implements universality by using the same indication information mechanism (TCI states and beam-related information) to determine frequency domain positions for both downlink and uplink PTRS resources across multiple TRPs. This multi-functional approach allows a single set of indication information to control PTRS positioning in various scenarios (different TRPs, different directions), providing resource allocation flexibility without proportionally increasing signaling overhead.
Data Source
AI summary
Provided are a position determination method and device for a reference signal, a communication node and a storage medium. The position determination method for a reference signal includes acquiring indication information; and determining the frequency domain position of a first PTRS and the frequency domain position of a second PTRS according to the indication information and a predefined mapping relationship. The predefined mapping relationship indicates a mapping relationship between the indication information and the frequency domain position of the first PTRS and a mapping relationship between the indication information and the frequency domain position of the second PTRS.