Dynamic Spatial Diversity Switching for Mobile Power Conservation
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Solution Overview
Problem
Mobile communication devices face a trade-off between quality of service and power consumption, especially when the internal power supply is low, leading to rapid deterioration in service quality due to reduced voltage and current, and existing solutions like spatial diversity increase power consumption.
Innovation Solution
Implementing a method in mobile devices and base stations that dynamically adjusts communication modes by disabling or enabling receive and transmit spatial diversity based on battery voltage thresholds, reducing power consumption while maintaining communication quality by sending state indications between devices and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial diversity is used to improve quality of service, then communication quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic switching between receive diversity mode and normal mode based on battery voltage thresholds. When voltage is high, the system operates in receive diversity mode for optimal quality of service. When voltage drops below a threshold, it switches to normal mode to reduce power consumption, and can switch back when voltage is replenished. This dynamic adaptation resolves the contradiction by adjusting the quality of service level according to available energy.
Solution Approach 2:
The system changes operational parameters (receive diversity enabled/disabled) based on battery voltage levels. By monitoring voltage and switching between different operational states, the system optimizes the balance between quality of service and power consumption, allowing full performance when energy is abundant and conserving energy when the battery is low.
2Use of energy by moving object
If receive diversity is disabled to reduce power consumption, then power consumption decreases, but quality of communication deteriorates
Solution Approach 1:
Instead of permanently disabling receive diversity, the system dynamically enables it when battery voltage is sufficient and disables it only when necessary. This temporary disabling during low-voltage conditions minimizes power consumption while maintaining communication quality when possible, resolving the contradiction between energy saving and service quality.
Solution Approach 2:
The system periodically monitors battery voltage and switches between operational modes accordingly. This periodic assessment allows the system to maximize quality of service during favorable conditions (high voltage) and conserve energy during unfavorable conditions (low voltage), achieving an optimal balance over time.
3Use of energy by moving object
If the device operates in low battery conditions with reduced voltage and current, then power consumption is reduced, but quality of service deteriorates rapidly
Solution Approach 1:
The system performs preliminary action by proactively switching to normal mode before the battery is completely depleted. By detecting low voltage conditions and switching modes in advance, the system prevents rapid quality deterioration that would occur if operation continued in low-voltage conditions, thereby extending usable communication time while maintaining acceptable service quality.
Solution Approach 2:
The system dynamically adapts its operational characteristics based on real-time battery voltage monitoring. By switching between receive diversity mode and normal mode according to voltage thresholds, the system optimizes the trade-off between power consumption and quality of service, extending the effective operational life of the battery while maintaining acceptable communication quality.
Data Source
AI summary
A method of communicating between a mobile communication device including a power supply, and a base station. The mobile device has first and second alternative communication modes, the first communication mode having higher quality of service and higher power consumption than the second communication mode. The second communication mode is adopted in response to a characteristic of the mobile device power supply indicative of a reduced reserve of power in the power supply, and a state indication is transmitted from the mobile device to the base station. The base station can respond to the state indication from the mobile device by modifying a communication characteristic of the base station with the mobile device, whereby to tend to compensate for the mobile device switching between the first and second communication modes.