MDT Configuration Power Optimization for Wireless UEs
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Solution Overview
Problem
Current Minimization of Drive Tests (MDT) in wireless communication systems do not effectively consider user equipment (UE) power consumption preferences, leading to inefficient battery usage and increased signaling, especially with the rise of 'always-on' applications in smartphones.
Innovation Solution
The network adjusts the MDT configuration based on UE preferences for power optimization by changing settings such as DRX intervals and measurement reporting periods, allowing UEs to conserve battery power and reduce signaling, and UEs can autonomously adapt their configurations to align with DRX or paging intervals for power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the network keeps the UE in connected state with long DRX interval to conserve battery power, then power consumption is reduced, but additional signaling for immediate MDT can negate the intended power savings
Solution Approach 1:
The patent changes the MDT configuration parameters based on UE power preference indications. When a UE indicates preference for power optimized configuration, the network adjusts MDT measurement and reporting parameters to reduce signaling frequency and align with DRX cycles, thereby reducing the energy lost in signaling while maintaining acceptable MDT functionality.
Solution Approach 2:
The patent introduces dynamic adaptation of MDT configuration based on UE power preference indications. The network can switch between different MDT configuration modes (immediate vs. logged MDT) and adjust reporting intervals dynamically according to UE battery status and power preferences, making the system flexible rather than static.
2Productivity
If the network releases UE connection after always-on application data transfer, then network resources are freed, but frequent state transitions reduce MDT sampling efficiency
Solution Approach 1:
The patent applies preliminary action by configuring the UE with logged MDT before releasing the connection. This allows the UE to continue collecting MDT measurements in the background while in idle state, ensuring measurement continuity and sampling accuracy is maintained even when the connection is released for network resource efficiency.
Solution Approach 2:
The patent ensures continuity of useful action by implementing logged MDT that allows measurement collection to continue uninterrupted during connection releases. The UE maintains measurement logging capability in idle state, ensuring that MDT data collection continues without gaps despite frequent connection state transitions.
3Measurement precision
If immediate MDT is configured with frequent reporting, then network obtains more MDT samples, but UE power consumption increases
Solution Approach 1:
The patent changes MDT configuration parameters based on UE power preferences. When power optimization is preferred, the network adjusts measurement and reporting intervals to reduce frequency, aligning with UE battery conservation goals while maintaining adequate sampling for network optimization purposes.
Data Source
AI summary
A network node receiving a preference for a power optimized configuration for a user equipment (UE) can in response change the UE's minimization of drive test (MDT) configuration to conserve UE power. For example, this change can be from immediate reporting of MDT measurements to connected mode logging MDT measurements or no reporting of MDT measurements; or to a longer interval for reporting them, or to drop the reporting of available location information with MDT measurements. Other teachings have actions by the UE, autonomous of the network, to conserve power. A UE receiving a MDT configuration having an MDT measurement reporting or logging interval, and also one or both of a discontinuous reception or paging configuration having a DRX/paging interval can adapt the MDT configuration autonomously of the network to conserve its battery power. For example, the UE can change the MDT measurement reporting/logging interval to be equal to or shorter than the DRX/paging interval, or it can ignore or reject the MDT configuration.