RIS Signal Timing With Selective Positioning Reference Signal Reporting
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G networks, face challenges in enhancing spectral efficiency and reducing latency, especially in scenarios involving reconfigurable intelligent surfaces (RIS) and non-RIS-aided signal timing, which affect the quality and reliability of positioning reference signals.
Innovation Solution
Implementing a UE and network entity configuration to measure and prioritize higher-quality positioning reference signals, utilizing RIS and non-RIS paths, and adjusting signal parameters like carrier frequency, bandwidth, and timing characteristics to optimize signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RIS-aided positioning reference signals are measured, then signal coverage and quality are improved, but measurement complexity and processing time increase
Solution Approach 1:
The patent segments the measurement process into distinct types: first-type DL-PRS measured directly from TRP and second-type DL-PRS measured via RIS. This segmentation allows the UE to handle different signal paths with dedicated measurement procedures, improving signal quality assessment while managing complexity through structured processing
Solution Approach 2:
The patent implements preliminary actions by configuring the UE to measure both types of DL-PRS and determining measurement quality thresholds in advance. The network entity also performs preliminary configuration to indicate which signal types should be measured, enabling efficient processing and reducing real-time complexity
2Measurement precision
If both first-type and second-type DL-PRS are measured, then positioning accuracy is improved, but processing time and latency increase
Solution Approach 1:
The patent applies partial action by enabling the UE to measure both types of DL-PRS but allowing selective reporting based on quality thresholds. The UE can determine whether to report measurements based on whether the measured quality meets predetermined thresholds, avoiding unnecessary processing time for low-quality signals while maintaining accuracy when needed
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports measurement quality information to the network entity, and the network entity uses this feedback to determine which signal types to configure for measurement. This feedback loop optimizes the balance between measurement precision and processing time by adapting to actual signal conditions
3Productivity
If measurement quality thresholds are applied, then unnecessary measurements are reduced, but measurement flexibility is limited
Solution Approach 1:
The patent applies dynamics by making the measurement configuration adaptive rather than fixed. The network entity can dynamically configure which signal types to measure based on real-time conditions, and the UE can dynamically adjust measurement reporting based on quality thresholds. This dynamic approach maintains flexibility while improving efficiency
Data Source
AI summary
A method of controlling signal exchange includes: receiving at least one of: (1) a measurement indication indicating a first measurement of a first signal type and/or a second measurement of a second signal type, the first signal type being for non-RIS-reflected signal transfer and the second signal type being for RIS-reflected signal transfer; or (2) a first UL-PRS of the first signal type and/or a second UL-PRS of the second signal type; or (3) an indication of a power-saving mode of a UE; and transmitting a message in response to the at least one signal, the message indicating for the UE to report measurement of DL-PRS of only one type of the first signal type or the second signal type and/or indicating for the UE to transmit UL-PRS of only one type of the first signal type or the second signal type.