Wireless Device Power Reduction via Mobility-Based Measurement Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication devices experience high power consumption during measurement gaps, as they frequently switch between radio access technologies and frequencies to perform measurements, often yielding no new information, which limits battery life and user experience.
Innovation Solution
A wireless communication device selectively determines whether to perform measurements during measurement gaps based on its mobility state, comparing it to a mobility threshold criterion; if stationary, it resends a previous measurement report, while if mobile, it performs a new measurement to send a new report to the serving network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurements are performed frequently during measurement gaps, then measurement accuracy and network handover reliability are improved, but power consumption increases significantly
Solution Approach 1:
The patent changes the measurement frequency parameter dynamically based on device mobility state. When the device is stationary or moving slowly, measurement frequency is reduced or skipped entirely. When the device is moving rapidly, measurement frequency is increased. This parameter adaptation resolves the contradiction by adjusting measurement activity to match actual network conditions, maintaining handover reliability when needed while reducing power consumption when mobility is low.
Solution Approach 2:
The patent introduces dynamic adaptation of measurement behavior based on real-time mobility state detection. The system transitions from static frequent measurement to dynamic measurement frequency adjustment. The device continuously monitors its mobility state and adapts measurement frequency accordingly, ensuring handover reliability during high mobility while conserving energy during low mobility periods.
2Loss of information
If measurements are performed during measurement gaps, then new cell information is obtained for handover decisions, but battery life is reduced due to intensive power consumption
Solution Approach 1:
The patent applies partial action by performing measurements selectively rather than continuously. Instead of executing full measurement cycles during every measurement gap, the device performs measurements only when mobility state indicates potential cell condition changes. This partial measurement approach maintains sufficient cell information for handover decisions while significantly reducing battery consumption compared to continuous measurement.
Solution Approach 2:
The patent changes the measurement execution parameter based on mobility state. When mobility is low, measurement parameter is set to skip or reduce frequency. When mobility is high, measurement parameter is set to execute normally. This dynamic parameter adjustment balances information freshness with battery life preservation.
3Adaptability or versatility
If the device tunes away from serving cell frequency to measure second cell frequency, then inter-frequency measurement capability is achieved, but power consumption increases due to radio stack switching
Solution Approach 1:
The patent introduces dynamic control of radio stack switching based on mobility state. Instead of always switching stacks for inter-frequency measurement, the system dynamically decides whether to switch stacks based on current mobility conditions. When mobility is low, stack switching is avoided or delayed. When mobility is high, stack switching is performed as needed. This dynamic approach maintains inter-frequency measurement capability while reducing the frequency of energy-intensive stack transitions.
Data Source
AI summary
A method for reducing power consumption by a wireless communication device is disclosed. The method can include the wireless communication device performing a first measurement of an alternative cell during a first measurement gap; sending a first measurement report generated based on the first measurement to the serving cell; storing the first measurement report; determining a mobility state of the wireless communication device; comparing the mobility state to a mobility threshold criterion; resending the first measurement report to the serving network as a report for a second measurement gap in an instance in which the mobility state satisfies the mobility criterion; and performing a second measurement of the alternative cell during the second measurement gap and sending a second measurement report generated based on the second measurement to the serving cell in an instance in which the mobility state does not satisfy the mobility threshold criterion.