Mobile Station Sleep Mode Activation for Low Battery Power
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Solution Overview
Problem
The Worldwide Interoperability for Microwave Access (WiMAX) standard does not specify how to trigger the sleep mode in mobile stations, leading to battery drain and loss of connectivity when the battery capacity is low, necessitating methods to reduce power consumption and prolong operation time.
Innovation Solution
Implementing a method to activate the sleep mode in mobile stations when residual battery capacity falls below a predefined threshold, using power saving class type 2 with constant sleep time duration, and adjusting sleep and listening window lengths to conserve battery power, while maintaining connectivity with the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station remains in active mode to maintain connectivity, then communication service is ensured, but battery power is rapidly depleted
Solution Approach 1:
The patent implements dynamic power management by enabling the mobile station to transition between active and sleep modes based on battery status. The system dynamically adjusts its operational state - remaining active when battery level is sufficient, and entering sleep mode when battery level drops below a threshold, thus adapting connectivity behavior to available energy resources.
Solution Approach 2:
The patent changes the operational parameter of the mobile station from a fixed active state to a variable state that depends on battery level. By monitoring battery status and adjusting the power mode parameter accordingly, the system resolves the contradiction between maintaining connectivity and conserving battery power.
2Use of energy by moving object
If the mobile station enters sleep mode to conserve battery power, then energy consumption is reduced, but connectivity may be lost
Solution Approach 1:
The patent implements a feedback mechanism where the mobile station monitors its own battery status and uses this information to control its power mode. The system continuously checks battery level and provides feedback to the power management logic, which then adjusts the operational state accordingly, ensuring connectivity is maintained when possible while conserving power when necessary.
Solution Approach 2:
The patent applies preliminary action by setting a battery threshold level in advance that triggers the transition to sleep mode. Before complete battery depletion occurs, the system proactively enters sleep mode when the threshold is reached, preventing total power loss while minimizing connectivity interruptions.
3Use of energy by moving object
If the mobile station frequently checks battery status, then power mode can be optimized, but additional power is consumed by monitoring
Solution Approach 1:
The patent applies partial action by implementing battery status monitoring at strategic intervals rather than continuously. The system performs battery level checks only when necessary to determine mode transitions, avoiding excessive monitoring that would consume more energy than it saves, thus optimizing the balance between power management and monitoring overhead.
Data Source
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AI summary
Certain embodiments of the present disclosure allow a mobile station to activate a sleep mode in order to reduce power consumption when the residual battery capacity is low. Certain embodiments of the present disclosure also provide techniques for adaptive power saving applied during an idle mode operation.