RAN Node Configures UE for MDT Measurement Coverage
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Solution Overview
Problem
The existing Minimization of Drive Test (MDT) framework faces issues where user equipment (UE) is often in a passive role and not properly selected or configured by the network for MDT tasks, leading to incomplete measurement results, especially when UEs with specific services are not in the required locations.
Innovation Solution
A method where a radio access network (RAN) node configures UE for MDT by receiving configuration items such as expected position, mobility profile, velocity, service profile, or indicators for local surroundings from a core network or operation and maintenance system, enabling the UE to perform and report MDT measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual driving test is used to perform driving test against network objects and quantities, then comprehensive measurement results can be obtained, but the process is time consuming and costly
Solution Approach 1:
The patent uses User Equipment (UE) to perform drive test measurements, creating a virtual copy of the manual driving test process. The UE collects MDT measurement results that replicate the data obtained from manual driving tests, eliminating the need for physical manual testing while maintaining measurement comprehensiveness
Solution Approach 2:
The network configures UEs to autonomously perform MDT tasks and collect measurement results. The UE automatically executes measurement configurations, collects data, and reports results without requiring manual intervention, thereby reducing both time and cost while maintaining measurement quality
2Device complexity
If UE volunteering for MDT task is not selected or configured by the network in proper service and mobility context, then network configuration complexity is reduced, but relevant MDT measurement results cannot be obtained for particular coverage places
Solution Approach 1:
The patent implements a feedback mechanism where the network receives MDT measurement results from UEs and uses this information to identify coverage issues. The network can then configure additional UEs or adjust configurations based on the measured data, creating a closed-loop system that ensures comprehensive coverage measurement
Solution Approach 2:
The network proactively configures UEs with MDT tasks before they enter specific coverage areas or service contexts. By anticipating measurement needs and pre-configuring UEs, the network ensures that measurement results are captured for all relevant coverage places without requiring complex real-time selection logic
3Adaptability or versatility
If network configures UE with MDT tasks outside ongoing or planned service and mobility profiles, then measurement coverage is improved, but UE operation complexity increases
Solution Approach 1:
The patent segments MDT configuration into separate, manageable components including measurement configurations, reporting configurations, and event-triggered configurations. This modular approach allows the UE to process individual configuration elements independently, reducing operational complexity while enabling comprehensive measurement coverage across different service and mobility contexts
Data Source
AI summary
The present disclosure describes methods, system, and devices for configuring a user equipment (UE) for minimization of drive test (MDT). One method includes receiving, by a radio access network (RAN) node, a start message from a core network (CN) or an operation and maintain system (OAM). The start message comprising at least one MDT configuration item and optional non-access stratum (NAS) information, the at least one MDT configuration item comprising at least one of the following MDT configuration information: an expected position, an expected mobility profile, an expected velocity, an expected direction, an expected service profile, or an indicator for the UE to sense and report local surroundings; and sending, by the RAN node, a configuration message to the UE, the configuration message, so that the UE performs according to the at least one MDT configuration item and the optional NAS information and reports a MDT measurement result.