Communication Device DRX Measurement Based on Movement State
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Solution Overview
Problem
Existing wireless communication devices face challenges in reducing power consumption during discontinuous reception operations, as they often maintain unnecessary active states, leading to increased power usage.
Innovation Solution
The communication device determines its movement state based on electric field value changes in inter-frequency bands, adjusting measurement targets and schedules accordingly to enter sleep mode more efficiently, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless communication device continuously measures electric field values for serving cell selection during DRX operation, then the measurement accuracy and cell selection reliability are improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement configuration adaptive to the device's movement state. The processor dynamically adjusts whether to perform inter-frequency band electric field value measurements based on detected movement states (moving vs. stationary). When stationary, measurements are relaxed or skipped; when moving, measurements are performed. This dynamic adaptation resolves the contradiction by maintaining reliability only when necessary (during movement) while reducing power consumption during stationary periods.
Solution Approach 2:
The patent changes the measurement parameter (electric field value measurement in inter-frequency band) based on the movement state. The processor monitors movement state and adjusts the measurement configuration accordingly - enabling measurements when movement is detected and disabling them when stationary. This parameter change approach allows the system to maintain cell selection reliability during movement while minimizing power consumption during stationary states.
2Measurement precision
If the communication device performs measurements on multiple frequency bands and cells, then the measurement precision and network coverage awareness are improved, but the power consumption and processing complexity increase
Solution Approach 1:
The patent applies partial action by performing measurements selectively rather than continuously. Instead of measuring all frequency bands and cells at all times, the processor performs inter-frequency band measurements only when movement state changes are detected. This partial measurement approach maintains sufficient measurement precision for cell selection while significantly reducing power consumption compared to exhaustive continuous measurement of all available frequency bands and cells.
3Speed
If the communication device frequently wakes up from sleep state to perform measurements, then the measurement timeliness and network responsiveness are improved, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by scheduling measurements based on movement state changes rather than using fixed periodic wake-ups. The processor enters sleep state during stationary periods and wakes up only when movement is detected, triggering a measurement cycle. This event-driven periodic approach maintains measurement timeliness when actually needed (during movement) while maximizing sleep duration during stationary periods, thereby reducing overall power consumption.
Data Source
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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.