PRS Processing Gap for Low Latency Positioning

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G networks, face challenges in efficiently processing positioning reference signals (PRS) due to interference from other downlink signals, which affects the accuracy and latency of positioning measurements.

Innovation Solution

Implementing a PRS processing gap that allows user equipment (UE) to prioritize PRS processing over other downlink signals, enabling dedicated time slots for accurate PRS measurement and processing, thereby reducing interference and improving positioning measurement reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If PRS processing is performed simultaneously with other downlink signal reception, then device utilization is maximized, but measurement accuracy deteriorates due to interference

Engineering Contradiction:

ImprovePRS measurement accuracyVSAvoiddevice utilization

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent segments the reception and processing of downlink signals by introducing dedicated PRS processing gaps. During these gaps, the UE prioritizes PRS processing over other downlink signals, effectively dividing the reception timeline into PRS-focused segments and general reception segments. This segmentation isolates PRS measurements from interfering signals while maintaining overall system productivity through efficient gap configuration.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If PRS processing gaps are introduced to improve measurement accuracy, then measurement precision improves, but time loss increases due to dedicated processing periods

Engineering Contradiction:

ImprovePRS measurement accuracyVSAvoidprocessing gap time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent implements periodic PRS processing gaps configured according to PRS resource periodicity. These gaps are introduced at specific intervals aligned with PRS transmission patterns, allowing the UE to perform measurements during dedicated time windows while resuming normal operations between gaps. The periodic nature ensures measurement accuracy is maintained without continuous time loss.

Inventive Principle:

Principle #19Periodic action

3Reliability

If PRS processing is prioritized over other downlink signals during processing gaps, then measurement reliability improves, but signal reception completeness worsens

Engineering Contradiction:

Improvepositioning measurement reliabilityVSAvoiddownlink signal reception

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent dynamically adjusts reception parameters during PRS processing gaps, switching the UE reception state to prioritize PRS signals. The network entity configures appropriate gap durations and timing based on positioning accuracy requirements, temporarily modifying reception behavior only when necessary. This parameter change approach ensures measurement reliability while minimizing impact on overall signal reception completeness.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11965973B2Positioning reference signal (PRS) processing window for low latency positioning measurement reporting

Publication Date: 2024.04.23 QUALCOMM INC

AI summary

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) measures one or more positioning reference signal (PRS) resources of at least one PRS instance, and processes the one or more PRS resources of the at least one PRS instance during a PRS processing gap, wherein the PRS processing gap comprises a period of time during which the UE prioritizes PRS processing over reception, processing, or both of other downlink signals and channels.