Multi-RAT MDT Logging for Network-Independent Measurements
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Solution Overview
Problem
Conventional minimization drive test (MDT) techniques for wireless communication devices with multiple radio access technologies (RATs) are limited by the ability to configure and perform measurements on only one RAT at a time, necessitating network intervention for switching configurations, which is inefficient and costly.
Innovation Solution
Mobile devices are configured to perform and log MDT measurements simultaneously for multiple RATs, allowing them to maintain and report logs for both RATs, facilitating seamless data collection without requiring network intervention for configuration changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MDT measurements are performed for multiple RATs simultaneously, then data collection efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the MDT logging function by creating separate logging buffers for each RAT type (e.g., LTE and NR). Each buffer independently stores measurement data for its specific RAT, allowing simultaneous multi-RAT measurements without requiring a single complex logging structure. This segmentation enables parallel data collection while keeping each individual logging mechanism relatively simple.
Solution Approach 2:
The patent implements a universal MDT logging mechanism that can handle multiple RAT types through a common interface. The logging buffer structure is designed to be RAT-agnostic, accepting measurement data from different RATs and storing them in a standardized format. This multi-functionality allows the same logging infrastructure to serve multiple purposes across different radio access technologies.
2Measurement precision
If network intervention is required for switching MDT configurations between RATs, then measurement accuracy is maintained, but network maintenance costs increase
Solution Approach 1:
The patent performs preliminary configuration by setting up separate logging buffers for multiple RATs in advance, before actual measurements begin. Each buffer is pre-configured with the appropriate parameters and data structures for its specific RAT type. This preliminary preparation eliminates the need for dynamic network intervention during measurement switching, as the device is already equipped to handle multiple RATs simultaneously.
Solution Approach 2:
The patent enables the user equipment to autonomously manage multi-RAT MDT logging without requiring network control for switching configurations. The device itself handles the complexity of managing multiple logging buffers, selecting appropriate measurement parameters, and organizing data by RAT type. This self-service capability transfers the configuration management burden from the network to the device, reducing network maintenance requirements.
Data Source
AI summary
A mobile wireless communication user equipment device (mobile device) simultaneously stores logs for two minimization drive tests (MDTs) where a first MDT is associated with a first radio access technology (RAT) and a second MDT is associated with a second RAT. The mobile device logs MDT data for both MDTs to generate two MDT logs. In response to a request, the mobile device transmits a requested MDT log where the MDT log may be transmitted to a base station of a RAT different from the RAT of the MDT log.