Wireless Positioning Measurement Time Window Configuration
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Solution Overview
Problem
Current positioning methods in wireless communication systems face challenges in accurately measuring the angle-based positioning of user equipment (UE) due to suboptimal beam configuration and lack of synchronization in measurement timing between UE and base stations, leading to inefficiencies in data traffic handling and increased latency.
Innovation Solution
A method for configuring a measurement time window based on system frame number, slot number, and time point to synchronize positioning measurements between UE and base stations, considering measurement gap configuration and measurement window configuration for positioning reference signal resources, ensuring accurate and low-latency positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the location server configures PRS resources in the UE with QCL information for the Rx beam, then the UE can receive the PRS through the indicated beam, but the beam may not be optimal and does not perfectly reflect the location of the TRP, leading to reduced positioning accuracy
Solution Approach 1:
The patent applies preliminary action by having the UE perform beam measurements and report beam quality information to the location server before final positioning calculation. The location server then uses this pre-collected beam data to determine the optimal TRP location, rather than relying on predetermined QCL information that may not reflect actual conditions.
Solution Approach 2:
The patent implements feedback by having the UE measure PRS signals through different beams and report the measurement results and beam quality metrics back to the location server. The location server uses this feedback to identify the optimal beam and calculate accurate TRP location, creating a closed-loop system that improves positioning accuracy.
2Productivity
If the location server transmits search window information (expected RSTD and uncertainty) to the base station and UE, then timing-related positioning measurement can be efficient, but this information cannot be helpful for angle-based measurement, leading to incomplete positioning support
Solution Approach 1:
The patent applies universality by designing a unified positioning framework that supports both timing-related positioning (using RSTD measurements) and angle-based positioning (using beam measurement results) through the same location server architecture. The location server can process different types of positioning measurements and apply appropriate algorithms for each, making the system versatile across multiple positioning methods.
3Measurement precision
If the UE performs positioning measurement without synchronized measurement timing configuration between UE and base station, then the measurement process is simple, but positioning accuracy deteriorates due to lack of synchronization
Solution Approach 1:
The patent applies preliminary action by having the location server pre-configure measurement timing windows and synchronization parameters before the UE performs positioning measurements. The UE uses these pre-configured timing parameters to synchronize its measurements with the base station transmissions, ensuring accurate measurements without requiring complex real-time synchronization protocols.
Data Source
AI summary
In an embodiment of the present specification, a method for performing positioning by a terminal in a wireless communication system comprises the steps of: receiving, from a position server, a request message for requesting measurement for the positioning, wherein the request message includes information for configuration of a measurement time window related to measurement for the positioning; and performing measurement for the positioning, on the basis of the request message, wherein the measurement for the positioning is performed on the basis of the measurement time window configured on the basis of the information for configuration of the measurement time window, and the measurement time window is configured on the basis of (i) a system frame number (SFN) and/or a slot number or (ii) a time point at which the terminal has received the request message.