Radio Terminal Location Association for MDT Quality Measurement
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Solution Overview
Problem
In the context of Minimization of Drive-Tests (MDT) in 3GPP systems, there is a challenge in precisely associating quality measurement results with the location of a radio terminal, especially when the terminal is moving, leading to inaccurate mapping and reduced effectiveness of quality measurement data.
Innovation Solution
A radio communication system is designed to instruct radio terminals to report location information at specific conditions during quality measurement, allowing for precise association of location data with measurement results, enhancing the accuracy and utility of quality measurement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quality measurement is performed over a long period to ensure accurate service quality assessment, then measurement reliability is improved, but the radio terminal moves to different locations making it difficult to associate measurements with specific locations
Solution Approach 1:
The patent applies preliminary action by having the radio terminal acquire and store location information at the beginning of the quality measurement period, before the measurement is actually performed. This ensures that even if the terminal moves during the measurement period, the location data captured at the start remains associated with the measurement results, resolving the contradiction between long measurement periods and location accuracy.
2Measurement precision
If location information is collected frequently to track terminal movement accurately, then location precision is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The system performs preliminary acquisition of location information before quality measurement begins, rather than continuously during the measurement period. This preliminary action captures the terminal's location at the measurement point of interest without requiring continuous location tracking, thereby maintaining location precision while avoiding the complexity and overhead of frequent location collection.
Solution Approach 2:
The patent extracts only the necessary location information (latitude, longitude, altitude) at the specific moment when quality measurement is performed or initiated, rather than collecting and processing continuous location data. This extraction approach provides sufficient location precision for association purposes while minimizing signaling overhead and system complexity.
3Reliability
If quality measurement execution period is extended to capture sufficient data for accurate assessment, then measurement reliability is improved, but difficulty in detecting and measuring specific location quality increases
Solution Approach 1:
The patent applies preliminary action by acquiring location information before the quality measurement execution period begins. This allows the system to extend the measurement period for reliable data collection while maintaining the ability to detect and measure location-specific quality by anchoring measurements to the pre-acquired location data, thus resolving the contradiction between extended measurement periods and location-specific detection accuracy.
Data Source
AI summary
The present invention is a radio communication system having quality measurement means configured to execute quality measurement related to a service quality in communication between a radio terminal and a radio station, and information collection means configured to collect information related to a location of the radio terminal to be a target for the quality measurement, the radio communication system comprising: means configured to associate the information related to the location of the radio terminal when a predetermined condition is satisfied in an execution period of the quality measurement with results of the quality measurement.