Power Efficient Notification System Using Cached Content
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Solution Overview
Problem
Users face difficulties in navigating and accessing information across numerous applications installed on computing devices, leading to increased time spent searching for desired information due to the complexity and number of applications.
Innovation Solution
A power-efficient application notification system that updates the user interface to present notifications without executing or resuming the application, using metadata to determine when to display content, regardless of the application's execution state, and employs power efficiency techniques to avoid updating notifications that would not be observable, such as during low power modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If applications are executed or resumed to display notifications, then notification content can be presented accurately, but power consumption increases and battery life decreases
Solution Approach 1:
The notification system extracts and displays notification content independently from the application execution state. The notification manager separates the notification presentation function from the application runtime, allowing notifications to be displayed using cached content without requiring the application to be executed or resumed, thus reducing power consumption while maintaining notification accuracy.
Solution Approach 2:
The system performs preliminary actions by caching notification content when the application is active, then uses this cached content for subsequent notification displays. This allows notifications to be presented without requiring the application to be executed at display time, reducing power consumption while ensuring accurate content presentation.
2Reliability
If applications are executed or resumed to display notifications, then notification content can be presented accurately, but device performance and responsiveness deteriorate
Solution Approach 1:
The notification system extracts notification content from the application execution context and manages it independently. The notification manager handles presentation using cached data, separating this function from application runtime requirements, thereby maintaining notification accuracy while improving device responsiveness by avoiding application execution overhead.
Solution Approach 2:
The system performs preliminary actions by pre-caching notification content during application execution. This allows subsequent notification displays to use the cached content without requiring application execution, maintaining content accuracy while significantly improving device responsiveness and reducing navigation delays.
3Reliability
If UI is updated frequently to reflect notifications, then notification visibility is improved, but power consumption increases
Solution Approach 1:
The notification system implements periodic action by updating the UI only at specific moments: when new notifications are received and when the device transitions to an active state. This selective updating approach ensures notification visibility while minimizing unnecessary UI refreshes that would consume power, thereby resolving the contradiction between visibility and power consumption.
Solution Approach 2:
The notification manager monitors device power state and autonomously determines when UI updates are necessary. It self-regulates by suppressing UI updates during low-power states and only refreshing when the device is active, ensuring notifications are visible when users can actually observe them while minimizing power consumption from unnecessary updates.
Data Source
AI summary
Applications on a computing device provide notifications associated with the application to a notification system. A notification includes an identification of content to be presented for the notification and an indication of when the content is to be presented. The notification system presents the notification content at the appropriate time regardless of whether the application is executing and without resuming execution of the application if the application is not running. Various power efficiency techniques are also used to determine which notifications are presented and when a user interface is updated to reflect those notifications in order to avoid updating the user interface to reflect notifications that would not be observable (e.g., due to a power mode of the computing device).