Master Wake Source Sleep Management for Power Reduction
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Solution Overview
Problem
Portable electronic devices face significant power consumption challenges due to always-on wake sources and memory refresh, which shorten battery life, especially when running delay-sensitive applications and maintaining user interaction readiness.
Innovation Solution
Implementing a master wake source, such as a Bluetooth Low Energy (BT LE) device, to control other wake sources, putting them in a sleep state until the user's presence is detected, thereby reducing overall power consumption by activating only necessary components when the user is near.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple wake sources are kept powered on to respond to user activity, then user interaction readiness is improved, but power consumption increases significantly
Solution Approach 1:
The patent segments the wake source functionality by introducing a master wake source that remains powered on to detect user presence, while slave wake sources are put to sleep and only activated when needed. This segmentation allows the system to maintain user interaction readiness through the master wake source while significantly reducing power consumption by keeping slave wake sources in a low-power state during idle periods.
Solution Approach 2:
The master wake source performs preliminary detection of user presence before activating the slave wake sources. This preliminary action allows the system to prepare for user interaction in advance, activating only the necessary components when a user is detected approaching, thereby reducing unnecessary power consumption while maintaining readiness.
2Speed
If wake sources are kept in powered on state to detect user presence, then system responsiveness is improved, but battery life decreases
Solution Approach 1:
By segmenting wake source responsibilities, the master wake source maintains continuous operation for user presence detection to ensure system responsiveness, while slave wake sources are segmented into sleep mode during idle periods. This segmentation resolves the contradiction by maintaining necessary responsiveness through the master wake source while extending battery life through reduced power consumption from sleeping slave wake sources.
Solution Approach 2:
The system implements periodic activation of slave wake sources based on user presence detection by the master wake source. Instead of keeping all wake sources continuously powered on, the slave wake sources are activated periodically only when needed, maintaining system responsiveness while significantly reducing overall power consumption and extending battery life.
3Adaptability or versatility
If all wake sources are activated simultaneously, then comprehensive user interaction is improved, but power consumption increases
Solution Approach 1:
The patent applies segmentation by dividing wake source functionality between a master wake source that remains active for comprehensive user presence detection and slave wake sources that are activated selectively. This allows the system to maintain adaptability and versatility for comprehensive user interaction through the master wake source while reducing energy loss by keeping slave wake sources in sleep mode during idle periods.
Solution Approach 2:
The system implements local quality by giving different operational states to different wake sources based on their roles. The master wake source maintains a powered-on state with high readiness to detect user presence, while slave wake sources are in a low-power state. This local differentiation allows comprehensive user interaction capability to be maintained through the master wake source while minimizing overall energy consumption.
Data Source
AI summary
Embodiments herein describe a mechanism that puts all the wake sources except a master wake source in low power state (e.g., sleep state) to reduce the overall sleep state power consumption. A Bluetooth Low Energy (BT LE) device is used as master wake source, which scans the presence of a user, and if the user (e.g., mobile device with specific media access control (MAC) address) is in the vicinity or approaching towards the system, the wake sources and memory are made active again. Other embodiments may be described and claimed.