Peripheral Power Management via Base Device Coordination
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Solution Overview
Problem
Mobile devices shutting off can sever connections with peripheral devices, leading to battery waste and loss of secure connections due to expired time-sensitive keys, as peripheral devices lack sophisticated shutdown and startup scheduling capabilities.
Innovation Solution
A base device generates and transmits a power management message to a peripheral device, specifying periods of reduced operation, allowing both devices to conserve battery power and rapidly reestablish connections upon resuming normal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the base device shuts off to conserve battery power, then battery life is extended, but the connection with the peripheral device is severed and time-sensitive security keys expire
Solution Approach 1:
The base device performs preliminary actions by saving connection state information and generating security keys before shutting off. The peripheral device is instructed to maintain connection state and preserve these keys during the base device's powered-off period, ensuring connection stability is maintained despite the power cycle
Solution Approach 2:
The peripheral device acts as an intermediary that maintains the connection state and security keys during the base device's powered-off period. It stores the connection state information and preserves time-sensitive keys, serving as a mediator that keeps the connection alive without requiring the base device to remain powered on
2Reliability
If the peripheral device remains on to maintain connection, then connection stability is preserved, but battery power is wasted
Solution Approach 1:
Instead of continuous operation, the peripheral device enters periodic sleep modes during which it maintains the connection state and security keys in a low-power state. The device periodically wakes to verify connection status and then returns to sleep, achieving both connection stability and power conservation
Solution Approach 2:
The peripheral device autonomously manages its own power state by receiving instructions from the base device to maintain connection state during power management periods. It self-manages the preservation of security keys and connection information without requiring continuous active processing, reducing power consumption while maintaining connection reliability
3Device complexity
If the base device lacks sophisticated shutdown scheduling capability, then device complexity is reduced, but it cannot coordinate power management with peripheral devices
Solution Approach 1:
The peripheral device serves as an intermediary that compensates for the base device's lack of sophisticated shutdown scheduling capability. The peripheral device receives power management instructions from the base device and autonomously manages its own power state, preserving connection state and security keys during the base device's powered-off period
Solution Approach 2:
The peripheral device performs self-service by autonomously managing its own power state based on instructions from the base device. It independently maintains connection state and security keys during power management periods without requiring the base device to have complex scheduling capabilities, achieving coordinated power management through the peripheral device's self-management
Data Source
AI summary
Based on bounds of a period of reduced operation for a base device, a base device generates a power management message for transmission to a peripheral device. In the power management message, the base device inserts bounds of a period of reduced operation for the peripheral device. As a result, the periods of reduced operation conserve battery power in both devices and the two devices may reestablish a communications channel upon reaching the end of the period of reduced operation and resuming normal operations.