Dynamic DRX Cycle Adjustment for Mobile UE Power Optimization
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Solution Overview
Problem
Conventional Discontinuous Reception (DRX) methods in mobile communication systems consume unnecessary power due to fixed DRX cycle lengths, which do not adapt to the varying data transmission patterns of services like Web browsing and File Transfer Protocol (FTP), keeping the receiver on during phases with minimal data reception.
Innovation Solution
A method and apparatus that dynamically adjust DRX cycle lengths based on service traffic characteristics, setting shorter active periods during data downloading phases and longer active periods during reading phases, allowing the UE to transition between these phases based on uplink data generation, thereby optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a fixed DRX cycle length is used, then the system structure is simple and easy to implement, but power consumption increases during reading phases with minimal data reception
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed DRX cycle length to a variable DRX cycle length that adapts to different service phases. The system dynamically adjusts the DRX cycle based on whether the UE is in a downloading phase or reading phase, making the previously static parameter dynamic to optimize power consumption during reading phases while maintaining simple implementation through phase-based control.
Solution Approach 2:
The patent changes the parameter of DRX cycle length from a constant value to a variable value that depends on the service phase. By introducing phase-based parameter adjustment (different DRX cycle lengths for downloading vs. reading phases), the system reduces power consumption during reading phases while maintaining simple implementation through phase detection and parameter switching.
2Reliability
If the receiver is kept on during reading phases, then data reception readiness is maintained, but unnecessary power is consumed when no data is transmitted
Solution Approach 1:
The patent segments the service period into two distinct phases: downloading phase and reading phase. By dividing the previously uniform service period into separate phases with different characteristics, the system can apply different DRX cycle lengths to each phase, allowing the receiver to be turned off during reading phases when no data is transmitted, thus reducing unnecessary power consumption while maintaining data reception readiness during downloading phases.
Solution Approach 2:
The patent implements periodic action by using phase-based periodic adjustment of the DRX cycle. The system periodically transitions between downloading phase and reading phase, and accordingly adjusts the DRX cycle length periodically. This periodic action allows the receiver to be activated only during necessary downloading phases and deactivated during reading phases, reducing unnecessary power consumption while maintaining reliability.
3Speed
If a shorter DRX cycle is used during downloading phases, then data reception responsiveness is improved, but power consumption increases compared to longer cycles
Solution Approach 1:
The patent applies local quality by assigning different DRX cycle lengths to different service phases based on their specific requirements. During downloading phases, a shorter DRX cycle is used to provide high data reception responsiveness. During reading phases, a longer DRX cycle is used to reduce power consumption. This local quality approach ensures that each phase receives the appropriate DRX cycle length tailored to its specific needs, optimizing both responsiveness and power consumption.
Data Source
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AI summary
A method and apparatus for DRX of a UE in a mobile communication system are provided, in which the UE receives setting information from a network, the setting information including a first DRX cycle length and a second DRX cycle length for a predetermined data service. Upon generation of uplink data, the UE transitions to a downloading phase in which active periods are set according to the first DRX cycle length.