PRS Muting Restriction Intervals for Accurate 5G Positioning
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in efficiently managing positioning reference signal (PRS) muting to achieve accurate and efficient positioning measurements, particularly in non-terrestrial networks (NTN), leading to interference and reduced performance.
Innovation Solution
Implementing a scheduling restriction interval for PRS resources, where specific time intervals around PRS transmissions are muted to avoid interference, allowing for precise positioning measurements by user equipment (UE) and transmission-reception points (TRPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS muting is implemented to avoid interference and improve positioning accuracy, then positioning precision is improved, but scheduling flexibility and resource utilization deteriorate
Solution Approach 1:
The patent implements dynamic scheduling restriction intervals that can be configured based on positioning accuracy requirements. The network can adjust the muting configuration flexibly, allowing the system to adapt between different positioning accuracy levels and scheduling flexibility as needed, rather than using a fixed muting approach
Solution Approach 2:
The patent changes the parameter of scheduling restriction by introducing configurable time intervals around PRS resources. By adjusting the duration and timing of these restriction intervals, the system can optimize the balance between positioning accuracy (requiring more muting) and scheduling flexibility (requiring less muting) based on specific operational needs
2Measurement precision
If scheduling restriction intervals are implemented around PRS resources, then interference is reduced and positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the scheduling restriction into specific time intervals around PRS resources rather than applying continuous or blanket restrictions. This segmentation allows the system to manage complexity by only applying restrictions where and when needed, rather than across the entire scheduling space
Solution Approach 2:
The patent introduces configuration messages as an intermediary mechanism that carries scheduling restriction information from the network to the UE. This intermediary approach simplifies the overall system complexity by centralizing the management of restriction intervals in the network layer, rather than requiring complex distributed decision-making at each device
3Measurement precision
If PRS resources are muted to ensure accurate measurements, then measurement quality is improved, but time efficiency deteriorates due to restricted scheduling
Solution Approach 1:
The patent implements periodic PRS transmissions with configured scheduling restriction intervals around each PRS resource. This periodic structure allows the system to efficiently alternate between measurement phases (with muting) and normal scheduling phases, optimizing the balance between measurement quality and time efficiency through regular, predictable cycles
Solution Approach 2:
The patent applies preliminary scheduling restriction actions before PRS transmissions to prevent potential interference in advance. By proactively muting scheduling around expected PRS resources, the system ensures measurement quality without requiring extended restriction periods, thereby reducing time loss while maintaining measurement integrity
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a first transmission-reception point (TRP) receives a positioning reference signal (PRS) configuration for a second TRP, wherein the PRS configuration indicates at least one or more PRS resources transmitted by the second TRP, and refrains from scheduling downlink transmissions during a scheduling restriction interval for the one or more PRS resources, wherein the scheduling restriction interval comprises a set of adjacent time intervals around each of the one or more PRS resources that is configured to be muted based on the downlink transmissions during the one or more PRS resources being muted.