PTRS Frequency Density Allocation for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing phase tracking reference signals (PTRS) across multiple transmission and reception points (TRPs), particularly in allocating time/frequency resources and determining frequency densities, which affects data transmission and reception efficiency.
Innovation Solution
A method for transmitting and receiving PTRS by user equipment (UE) involving the allocation of time/frequency resources based on single DCI (Downlink Control Information) for multiple TRPs, with specific resource mapping and frequency density determination to optimize PTRS transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PTRS is transmitted across multiple TRPs using single DCI, then resource allocation efficiency improves, but determining frequency density and resource mapping becomes more complex
Solution Approach 1:
The patent segments the frequency domain resources by dividing the total resource blocks into multiple groups, with each group associated with a specific TRP. The frequency density of PTRS is determined separately for each resource block group based on the number of resource blocks in that group. This segmentation allows efficient resource allocation across multiple TRPs while managing complexity through structured division of the frequency domain.
2Measurement precision
If frequency density of PTRS is determined by number of resource blocks per TCI state, then transmission precision improves, but resource management complexity increases
Solution Approach 1:
The patent dynamically adjusts the frequency density parameter of PTRS based on the number of resource blocks allocated to each TCI state. When the number of resource blocks changes, the frequency density is recalculated and adjusted accordingly. This parameter change approach ensures accurate PTRS transmission precision while adapting to varying resource allocation scenarios without requiring complete resource management redesign.
Data Source
AI summary
A method for transmitting and receiving a PDSCH in a wireless communication system, and a device for same. The method for a terminal to receive a PDSCH includes the steps of: receiving setting information; receiving, on the basis of the setting information, Downlink Control Information (DCI) for scheduling the PDSCH, wherein the DCI includes a frequency domain resource assignment field and a Transmission configuration indication (TCI) field; and receiving the PDSCH on frequency domain resource blocks assigned on the basis of the frequency domain resource assignment field, wherein the frequency density of the PTRS can be determined by the number of resource blocks associated with each TCI state.