DRX Measurement Control Using Movement-Based Band Selection
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Solution Overview
Problem
Existing wireless communication devices face challenges in reducing power consumption during discontinuous reception operations due to inefficient management of electric field value measurements across different frequency bands.
Innovation Solution
A communication device that determines its movement state based on electric field value changes in inter-frequency bands, adjusting measurement targets accordingly to minimize power consumption by optimizing sleep and active states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electric field value measurements are performed in both intra-frequency band and inter-frequency band continuously, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement strategy adaptive rather than static. The device dynamically adjusts between continuous measurement and reduced measurement based on detected movement states. When movement is detected through electric field changes, the device switches to a reduced measurement mode that focuses only on intra-frequency band, thereby reducing power consumption while maintaining measurement precision when needed.
Solution Approach 2:
The patent changes the measurement parameters (frequency bands monitored, measurement frequency) based on the device's movement state. When stationary, the device measures only intra-frequency band with reduced frequency. When movement is detected, it expands measurement to include inter-frequency bands. This parameter adaptation resolves the contradiction by adjusting measurement intensity to actual needs.
2Measurement precision
If measurement frequency is increased to maintain accurate cell selection, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent dynamically changes measurement parameters including frequency and scope based on movement detection. When the device is stationary, measurement frequency is reduced and scope is limited to intra-frequency band. When movement is detected, measurement frequency and scope increase to include inter-frequency bands, ensuring accurate cell selection only when necessary.
Solution Approach 2:
The measurement system transitions from static continuous high-frequency measurement to dynamic adaptive measurement. The device monitors for movement indicators and adjusts measurement intensity accordingly, maintaining cell selection accuracy during movement while enabling extended sleep periods during stationary states.
3Use of energy by moving object
If the device enters sleep state frequently to reduce power consumption, then power consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent implements a dynamic measurement strategy where the device alternates between sleep state and measurement states based on movement detection. During stationary periods, the device enters sleep state to conserve power. When movement is detected, the device wakes up to perform comprehensive measurements including inter-frequency bands, ensuring measurement precision is maintained when actually needed.
Solution Approach 2:
The patent uses periodic measurement cycles interrupted by sleep periods. Instead of continuous measurement, the device performs measurements periodically based on movement indicators. This periodic action allows the device to balance power consumption with measurement precision by measuring only when movement suggests cell reselection may be needed.
4Adaptability or versatility
If inter-frequency band measurements are performed continuously, then adaptability is improved, but power consumption increases
Solution Approach 1:
The patent makes frequency band measurement adaptive through movement detection. The device dynamically determines which frequency bands to measure based on whether movement is detected. When stationary, measurement is limited to intra-frequency band. When movement is detected, the device adapts by including inter-frequency band measurements, providing frequency band adaptability only when needed for cell reselection.
Data Source
AI summary
A method of operating a communication device supporting a discontinuous reception (DRX) operation includes determining a movement state of the communication device based on a first electric field value change amount in an inter-frequency band to obtain a determined movement state, the inter-frequency band being different from an intra-frequency band allocated for communication with a serving cell, determining at least one of a measurement target frequency band or a measurement target cell according to the determined movement state, measuring an electric field value corresponding to the at least one of the measurement target frequency band or the measurement target cell, and updating the movement state based on the electric field value to obtain an updated movement state.