MDT Data Correlation via Trace Session ID
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Solution Overview
Problem
Current drive test minimization techniques in LTE and UMTS environments rely on non-guaranteed best effort location information, which can result in inaccurate positioning data, especially at cell edges, making the Minimization of Drive Test (MDT) feature less usable for operators.
Innovation Solution
A method is introduced where a mobile terminal receives a position request with a trace session identification parameter and measurement configuration message, collects and sends positioning and measurement data, allowing for correlation based on trace session identification parameters, thereby enabling accurate association of MDT measurements with position estimates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timestamp-based correlation is used to associate positioning data and measurement data, then the correlation process becomes more power consuming and time-consuming, but the patent does not explicitly state a worsening feature here
Solution Approach 1:
The patent applies preliminary action by pre-configuring the trace session identification parameter in both positioning data and measurement data before correlation is needed. This allows the trace collection entity to directly match records using the pre-assigned identifier rather than performing time-consuming timestamp-based correlation or complex post-processing matching, thus reducing correlation processing time while maintaining positioning accuracy
2Device complexity
If best effort location information is used for MDT logs, then the system complexity is reduced, but the positioning accuracy deteriorates especially at cell edges
Solution Approach 1:
The patent introduces a trace session identification parameter as an intermediary element that links positioning data and measurement data without requiring complex post-processing systems or core network coordination. This simple identifier mechanism maintains low system complexity while enabling accurate association of MDT measurements with precise position estimates, solving the contradiction between simplicity and accuracy
3Measurement precision
If core network triggered positioning is implemented, then positioning accuracy is improved, but the device complexity and power consumption increase
Solution Approach 1:
The patent extracts the trace session identification parameter assignment from the complex core network triggered positioning process and embeds it directly in the positioning request sent to the UE. This extraction eliminates the need for complex post-processing systems and core network coordination, reducing system complexity while preserving the ability to provide accurate positioning information through the simplified identifier-based correlation mechanism
Data Source
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AI summary
A network control element receives position information data comprising a trace session identification parameter, the position information data including information about the position of a mobile terminal, and measurement data comprising the trace session identification parameter are received. The position information data is correlated with the measurement data based on the trace session identification parameter.