Event-Based MDT Logging With Dynamic Log Retrieval Signals
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Solution Overview
Problem
Current MDT reporting techniques are limited by fixed log sizes and lack flexibility in data types, leading to inefficiencies in data collection and network optimization, particularly in 5G NR systems where additional information like mobile device orientation, best beam, and out-of-coverage conditions are valuable but increase log size, necessitating improved methods for log retrieval and data type indication.
Innovation Solution
Mobile devices provide event-based MDT logging with enhanced log availability indicators, including log size and data type information, allowing the network to determine optimal times for retrieval based on traffic conditions and data relevance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed log sizes are used for MDT reporting, then the system structure is simple, but data collection efficiency is reduced and memory burden increases
Solution Approach 1:
The patent implements dynamic log size configuration where the MDT log size is no longer fixed but can be adjusted based on network conditions, device capabilities, and measurement requirements. The network can configure different log sizes for different UEs and different measurement scenarios, allowing the system to adapt to varying data collection needs without requiring rigid pre-defined structures.
Solution Approach 2:
The patent changes the parameter of log size from a fixed value to a configurable parameter. The MDT configuration includes parameters that define the log size, measurement duration, and data types to be collected. This allows the network to optimize the balance between memory usage and data collection efficiency by adjusting these parameters based on actual network conditions and requirements.
2Measurement precision
If comprehensive data types are collected, then measurement precision is improved, but memory burden on mobile devices increases
Solution Approach 1:
The patent applies local quality by allowing different UEs to collect different types of measurement data based on their specific capabilities, locations, and network conditions. Not all UEs are required to collect all data types; instead, the network can configure specific measurement types for specific UEs, reducing overall memory burden while maintaining measurement precision where needed.
Solution Approach 2:
The patent implements partial action by allowing the network to configure only the necessary measurement types and log sizes for each UE based on specific optimization needs. Rather than requiring all UEs to collect comprehensive data, the system collects partial data sets that are sufficient for the intended optimization purposes, reducing memory usage while maintaining adequate measurement precision.
3Productivity
If event-based logging is implemented, then data collection efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously determine when to start and stop logging based on configured event criteria. The UE monitors for specific events (such as entering a measurement area, detecting signal quality thresholds, or experiencing connection state changes) and automatically initiates or terminates logging without continuous network control, improving efficiency while keeping the device logic relatively simple.
Solution Approach 2:
The patent applies preliminary action by pre-configuring event criteria and logging parameters before the UE enters idle or inactive states. The network provides MDT configuration including event triggers, measurement parameters, and log size settings in advance. When the UE enters the configured event conditions, logging is automatically activated with pre-defined parameters, eliminating the need for complex real-time decision-making at the device.
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.