MDT Logging Priority Control for Lower UE Resource Use
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Solution Overview
Problem
Wireless communication networks face challenges in efficiently managing the size and resource consumption of minimization of drive test (MDT) logs, leading to increased network overhead and resource usage at user equipment (UE), which can impact thermal levels and battery life.
Innovation Solution
Implementing a method to filter redundant information from MDT logs based on measurement priorities and thresholds, segmenting logs when necessary, and configuring UE measurements to reduce resource consumption and log size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If comprehensive measurements are collected for all logged measurement types, then measurement completeness is improved, but MDT log size and network overhead increase
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different measurement types based on their importance. Critical measurements (e.g., RSRP, RSRQ) are collected comprehensively, while less critical measurements are filtered or sampled. This selective collection maintains measurement completeness for essential parameters while reducing overall log size.
Solution Approach 2:
The patent changes the collection parameters dynamically based on UE status criteria (battery level, thermal conditions, mobility state). When UE resources are constrained, the system adjusts which measurement types are collected and at what granularity, transforming the static comprehensive collection approach into a adaptive parameter-based selection.
2Measurement precision
If all logged measurement types are collected regardless of UE status, then measurement completeness is improved, but UE resource consumption increases
Solution Approach 1:
The patent implements dynamics by making the measurement collection strategy adaptive to changing UE conditions. The system continuously monitors UE status (battery level, thermal state, mobility) and dynamically adjusts measurement collection accordingly. When resources are abundant, comprehensive measurements are collected; when constrained, the system prioritizes critical measurements only.
Solution Approach 2:
The patent changes collection parameters based on UE status thresholds. When battery level drops below a threshold or thermal conditions worsen, the system modifies which measurement types are collected and at what frequency, transforming the static comprehensive collection into a dynamic resource-aware approach.
3Loss of information
If MDT logs are transmitted without filtering, then information completeness is improved, but network overhead increases
Solution Approach 1:
The patent extracts and removes redundant or less critical information from MDT logs before transmission. By identifying and filtering out measurements that are less useful for network optimization (e.g., measurements above threshold values, duplicate measurements), the system reduces network overhead while preserving essential information for coverage and quality assessment.
Solution Approach 2:
The patent discards redundant measurement data that does not contribute to network optimization goals, while recovering and preserving critical measurements. The filtering mechanism selectively discards low-value data to reduce transmission burden while ensuring high-value measurements are recovered and transmitted for network analysis.
4Reliability
If comprehensive MDT logging is performed, then network coverage quality is improved, but UE thermal levels and battery life are worsened
Solution Approach 1:
The patent applies partial action by collecting only the necessary measurements required for network coverage optimization rather than all possible measurements. When UE thermal levels or battery conditions indicate resource constraints, the system performs partial measurement collection focused on critical parameters, reducing thermal generation and energy consumption while maintaining adequate network quality assessment.
Solution Approach 2:
The patent changes measurement collection parameters based on thermal and battery status thresholds. When UE temperature exceeds thresholds or battery level drops, the system modifies measurement collection intensity and scope, reducing the computational and thermal load while maintaining sufficient data for network coverage quality assessment.
Data Source
AI summary
A method performed by a user equipment (UE) includes receiving a logging measurement message having a logging measurement configuration from a base station. The method also initiates a minimization of drive test (MDT) session in response to receiving the logging measurement message. The method further determines a status of a UE component and selects a set of logged measurement types from a number of logged measurement types based on a measurement priority of each logged measurement type when the status satisfies status criteria. The method additionally generates an MDT log at each logging instance of a number of logging instances based on measurements collected for the set of logged measurement types when the status satisfies the status criteria. The method also transmits, to the base station, the MDT log of each logging instance after completing the MDT session.