Multi-SIM Telematic Device Battery Saving Algorithm
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Solution Overview
Problem
Telematic devices with multiple SIM profiles often face connectivity issues when switching between profiles, leading to disconnection and battery drain due to continuous attempts to connect to wireless communication networks.
Innovation Solution
A battery-saving algorithm that adjusts retry intervals for connecting to a wireless communication network using different SIM profiles, with a faster increase in retry intervals when powered by battery, employing a first back-off scheme when not on battery power and a second, more aggressive back-off scheme when on battery power, to conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the telematic device continuously attempts to connect to the wireless communication network using a second SIM profile after switching from a first SIM profile, then the device may eventually establish a connection, but the battery is quickly drained due to continuous retry attempts
Solution Approach 1:
The patent implements dynamic retry intervals that adjust based on power source detection. When battery power is detected, the retry interval increases at a faster rate compared to when external power is detected. This dynamic adjustment optimizes the balance between connection reliability and battery conservation, allowing the system to adapt its behavior based on available power resources.
Solution Approach 2:
The system changes the retry interval parameter based on the detected power source. A first back-off scheme is applied when external power is detected, while a second, more aggressive back-off scheme is applied when battery power is detected. This parameter change strategy allows the system to optimize connection attempts according to power availability, reducing battery consumption while maintaining connection reliability.
2Reliability
If the telematic device uses a first back-off scheme for retry intervals, then connection attempts are made with moderate delays, but when powered by battery, a faster increase in retry intervals is needed to conserve battery life
Solution Approach 1:
The system dynamically switches between two different back-off schemes based on power source detection. The first back-off scheme is used when external power is available, providing moderate retry intervals. When battery power is detected, the system transitions to a second back-off scheme that increases retry intervals at a faster rate, thereby conserving battery life while still attempting to establish connections.
Solution Approach 2:
The system implements feedback by continuously monitoring the power source status and adjusting the retry interval strategy accordingly. When the power source changes from external to battery, the system receives feedback and switches to the more aggressive back-off scheme. This feedback mechanism ensures that the connection strategy adapts to current power conditions, optimizing both connection reliability and energy conservation.
Data Source
AI summary
Telematic device with multiple subscriber identity modules (SIMs). The telematic device may execute software that, when establishing a new connection, executes a battery-saving algorithm. The algorithm may comprise, in each of one or more iterations, attempting to connect to a wireless communication network via a cellular communications interface using a SIM profile. When the attempt fails, the algorithm determines whether or not the telematic device is being powered by a battery. When the telematic device is not being powered by the battery, a retry interval is adjusted according to a first back-off scheme. On the other hand, when the telematic device is being powered by the battery, the retry interval is adjusted according to a second back-off scheme (e.g., which is more aggressive than the first back-off scheme to conserve the battery). The algorithm then waits for a duration indicated by the retry interval before the next iteration.