MDT Log Reporting via RRC Signaling in Mobile Networks
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Solution Overview
Problem
Current methods for reporting Minimization of Drive Test (MDT) logs in mobile communication networks are inefficient, particularly in idle mode, as they require manual intervention and lack an effective mechanism for logging and transmitting measurement data across different cells and technologies.
Innovation Solution
A method and mobile communication device that enables automated logging and reporting of MDT measurements by storing data in memory and transmitting it upon request, using RRC signaling, with features like location tagging and on-demand reporting, allowing for seamless handovers and cell updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual drive testing is performed to evaluate network performance, then network performance evaluation is achieved, but operational complexity and time consumption increase significantly
Solution Approach 1:
The user equipment automatically performs measurements and logs MDT data without manual intervention. The system configures itself to collect measurement data, store it in memory, and report it automatically, eliminating the need for operators to manually drive test the network
Solution Approach 2:
The patent replaces manual mechanical drive testing with automated electronic measurement and reporting systems. The user equipment uses software-based measurement collection and automated data transmission to substitute the physical manual testing process
2Quantity of substance
If MDT measurements are collected and stored for later reporting, then comprehensive network performance data is obtained, but device memory and storage requirements increase
Solution Approach 1:
The measurement data is extracted from the user equipment and transferred to the network infrastructure for storage and analysis. The logging function stores data temporarily in device memory but the actual data retention and processing burden is moved to the network side through automated reporting
Solution Approach 2:
The network infrastructure acts as an intermediary between the user equipment measurements and the final analysis. Data is transmitted through RRC signaling to the network, which then handles storage, correlation, and analysis, reducing the burden on the mobile device
3Productivity
If automated MDT logging and reporting is implemented, then operational efficiency is improved, but system complexity increases due to multiple signaling protocols and handover procedures
Solution Approach 1:
The RRC signaling mechanism is designed to handle multiple functions including measurement configuration, data reporting, and handover coordination through a unified protocol framework. This multi-functional approach reduces the need for separate specialized protocols for each operation
Solution Approach 2:
The network pre-configures the user equipment with measurement parameters, logging instructions, and reporting criteria before data collection begins. This preliminary configuration simplifies the automated process by establishing all necessary parameters in advance, reducing real-time decision complexity
Data Source
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AI summary
Methods and mobile communication devices for reporting an MDT log are provided. The method is used in a mobile communication device in a service network comprising a plurality of cells. The method comprises transmitting, by the mobile communication device, an MDT log to the service network via a serving cell upon receiving a request message for the MDT log; and terminating, by the mobile communication device, the transmission of the MDT log in response to a change of the serving cell from a first cell to a second cell in the service network.