MDT Measurement Control via RAT Capability Notification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
User terminals in mobile communication systems do not necessarily support Minimization of Drive Tests (MDT) measurements across all radio access technologies, leading to unexpected errors when attempting to perform MDT measurements in Public Land Mobile Networks (PLMNs) that do not belong to the supported radio access technology.
Innovation Solution
A communication control method where user terminals notify network devices of their supported radio access technologies for MDT measurements, and the network devices set a PLMN list for MDT measurements based on this information, ensuring that only supported PLMNs are included for measurement, thereby preventing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network sets a PLMN list including all PLMNs without considering user terminal RAT support, then the PLMN list coverage is maximized, but unexpected errors occur when the user terminal attempts MDT measurements in unsupported PLMNs
Solution Approach 1:
The user terminal performs preliminary action by notifying the network of its supported RATs for MDT measurements before the network sets the PLMN list. This advance information exchange enables the network to configure an accurate PLMN list that matches the terminal's capabilities, preventing measurement errors while maintaining comprehensive PLMN coverage.
2Adaptability or versatility
If the user terminal supports MDT measurement on multiple RATs, then the MDT measurement capability is enhanced, but the device complexity increases
Solution Approach 1:
The user terminal provides feedback to the network about its supported RATs for MDT measurements. This feedback mechanism enables the network to understand the terminal's capabilities and configure the PLMN list accordingly, allowing multi-RAT support without increasing terminal complexity as the management burden is shifted to the network side.
Data Source
AI summary
A communication control method according to the present invention comprises: a step A of notifying, by UE 100 in a connected state, a MME/S-GW300 of RAT information on an MDT support RAT that is a radio access technology (RAT) on which the user terminal supports an MDT measurement; and a step B of setting to the UE 100, by network device, a PLMN (public land mobile network) list indicating a public land mobile network that permits MDT measurement, on the basis of RAT information.