Event-Based MDT Logging for Selective 5G NR Data Retrieval
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Solution Overview
Problem
Current MDT systems are limited in the type and size of data they can collect, particularly in 5G NR systems, which can lead to increased memory burden and inefficient data retrieval, especially when additional information like mobile device orientation, best beam, out-of-coverage conditions, and geographical location is needed.
Innovation Solution
Mobile devices provide event-based MDT logging with enhanced log availability indicators, including log size and data type, allowing the network to determine optimal retrieval times and prioritize data based on criteria such as location and signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MDT logging collects comprehensive data including orientation, beam, location information, then measurement precision is improved, but device memory burden increases
Solution Approach 1:
The patent extracts and reports only the most relevant MDT data characteristics (log size, data types present) to the network, rather than transmitting all collected data. This allows the network to selectively retrieve only necessary information, reducing the memory burden on the device while maintaining measurement precision for coverage optimization.
Solution Approach 2:
Instead of the network requesting all MDT data and the device transmitting everything, the invention inverts the approach by having the device report data characteristics first, allowing the network to decide what to retrieve. This reduces unnecessary data transmission and memory usage on the device side.
2Measurement precision
If MDT logging collects all available data continuously, then measurement precision is improved, but loss of time increases due to inefficient data retrieval
Solution Approach 1:
The patent implements preliminary action by having the mobile device report MDT log characteristics (size, data types) before the network requests data retrieval. This advance information allows the network to prioritize and schedule retrievals more efficiently, reducing the time loss associated with data retrieval operations.
Solution Approach 2:
The invention introduces feedback mechanisms where the device provides information about available MDT data characteristics to the network. This feedback enables the network to make informed decisions about when and what to retrieve, optimizing the retrieval process and reducing overall data retrieval time.
3Measurement precision
If MDT logging stores extensive data locally, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary approach where the network acts as a mediator between the device's local storage and the optimization process. The device stores data locally with enhanced capabilities, but the network manages the retrieval and analysis, distributing the complexity burden and enabling comprehensive data collection without proportionally increasing device complexity.
Data Source
AI summary
A mobile wireless communication device (mobile device) receives a Minimization of Drive Test (MDT) configuration comprising criteria for performing event-based logging. The mobile device determines if the criteria have been met and, in response to a determination that the criteria have been met, performs an MDT in accordance with the MDT configuration. The MDT results are logged in the memory as an MDT log. The mobile device transmits, to a base station, a log availability indicator indicating the availability of the event-based MDT log.