Sidelink Triggered MDT Logging for V2X Network Optimization
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Solution Overview
Problem
Existing network planning solutions for vehicular environments, such as motorways and tunnels, are not suitable due to differences in mobility profiles and power consumption between traditional mobile broadband devices and vehicle-to-everything (V2X) devices, as they rely on classical minimization of drive test (MDT) logging principles that are not tailored for vehicular scenarios.
Innovation Solution
Implementing sidelink-based triggering of wireless device measurements, where a wireless device configures and logs MDT data based on sidelink operational criteria, including configuration, active operation, and operational modes, and pauses or suspends logging when these criteria are no longer met or a timer expires, allowing for customized radio network deployment and tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If classical MDT logging principles are used for vehicular environments, then traditional mobile broadband device measurements are obtained, but the measurements are not suitable for V2X devices due to differences in mobility profiles and power consumption
Solution Approach 1:
The patent applies local quality by creating V2X-specific MDT logging configurations tailored to vehicular environments. The network node configures specific logging parameters, measurement types, and reporting conditions that are optimized for V2X devices with their unique mobility profiles and power consumption characteristics, rather than using generic MDT settings designed for traditional mobile broadband devices.
Solution Approach 2:
The patent implements parameter changes by modifying MDT logging parameters specifically for V2X operations. This includes adjusting logging intervals, measurement thresholds, and reporting conditions to match the higher mobility and different power constraints of vehicular devices. The network can dynamically change these parameters based on the device's operational state and mobility pattern.
2Quantity of substance
If MDT logging is continuously performed for V2X devices, then comprehensive measurement data is collected, but power consumption increases which is not suitable for V2X operational constraints
Solution Approach 1:
The patent applies periodic action by implementing discontinuous MDT logging for V2X devices. Instead of continuous logging, the system performs measurements and logging at periodic intervals or triggered by specific events such as changes in operational mode, location, or connectivity state. This reduces power consumption while still collecting sufficient data for network optimization in vehicular environments.
Solution Approach 2:
The patent implements partial action by selectively logging only the most relevant measurement parameters for V2X operations. Rather than continuously logging all possible measurement types, the system focuses on critical parameters such as sidelink quality, network coverage status, and mobility-related metrics, thereby reducing overall power consumption while maintaining data usefulness.
3Ease of operation
If MDT logging is configured without sidelink triggering, then general network measurements are obtained, but measurements specific to V2X operational modes and sidelink performance are missed
Solution Approach 1:
The patent implements feedback by using sidelink operational status as a trigger for MDT logging activation. The system monitors sidelink connection state, operational modes, and performance metrics, and automatically triggers or adjusts MDT logging based on this feedback. This ensures that measurements are performed precisely when V2X-specific conditions are present, improving measurement relevance without requiring complex manual configuration.
Data Source
AI summary
According to one or more embodiments, a wireless device is provided. The wireless device includes processing circuitry configured to: determine whether a sidelink operational criterion is met, and initiate logging of minimization of drive test, MDT, data based at least on determining that the sidelink operational criterion is met. According to one or more embodiments, a network node is provided. The network node includes processing circuitry configured to: configure a wireless device with a sidelink operational criterion where the sidelink operational criterion is configured to initiate logging of minimization of drive test, MDT, data at the wireless device based at least on the sidelink operational criterion being met, receive MDT data, and perform at least one action based on the received MDT data.