Dual Modem Circuit Switching for Vehicle Power Management
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Solution Overview
Problem
Mobile communication devices in vehicles require significant electrical energy for high data transfer rates, making it inefficient to maintain wireless connections when parked or in low-power conditions, as existing modem circuits are designed for higher energy consumption.
Innovation Solution
Incorporating an additional modem circuit with a lower bit rate and simpler modulation techniques, allowing the device to switch between basic and additional modes based on power requirements and operational conditions, such as parking or interference levels, to reduce energy consumption while maintaining connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a basic modem circuit with high data transfer rate (CAT-4 or higher) is used, then the wireless connection provides high bandwidth and fast data transfer, but the electrical energy consumption increases significantly
Solution Approach 1:
The system dynamically switches between two modem circuits based on operational conditions. The control unit selects which modem to activate depending on whether the vehicle is in motion or parked, thereby adapting the data transfer capability and energy consumption to the actual operational requirements.
Solution Approach 2:
The invention changes the operational parameters by switching between two different modem circuits with different performance characteristics. The first modem circuit is configured for high-speed data transfer during vehicle operation, while the second modem circuit is configured for low-power operation during parking, thus changing the system parameters to match operational needs.
2Use of energy by moving object
If the modem circuit is deactivated during parking to save energy, then electrical energy consumption is reduced, but the motor vehicle can no longer be reached from the outside via wireless connection
Solution Approach 1:
The invention segments the modem functionality into two separate modem circuits, each optimized for specific operational scenarios. The first modem circuit handles high-speed communication during vehicle operation, while the second modem circuit maintains basic connectivity during parking with minimal energy consumption.
Solution Approach 2:
The second modem circuit acts as a low-cost, energy-efficient backup solution for parking scenarios. It provides minimal but sufficient connectivity when the vehicle is parked, consuming significantly less energy than the primary modem circuit while maintaining basic wireless availability.
3Length of moving object
If the transmission signal is amplified to increase transmission range in weak signal conditions, then the wireless connection range is extended, but the electrical energy consumption increases
Solution Approach 1:
The second modem circuit provides a low-power alternative for maintaining basic connectivity during parking. While it has lower transmission power and range compared to the first modem circuit, it suffices for typical parking scenarios and consumes minimal energy, avoiding the need for high-power amplification.
Data Source
AI summary
An embodiment relates to a mobile communication device for a motor vehicle, wherein the mobile communication device is adapted to provide a wireless connection to a mobile communication network, and a control unit of the mobile communication device is programmed to transmit and/or to receive data via the wireless connection in a basic mode through a basic modem circuit, which provides a predetermined basic bit rate. According to the invention, an additional modem circuit is provided, which provides a low bit rate that is lower than the basic bit rate for transferring data via the wireless connection, wherein the control unit is programmed to identify at least one predetermined switching event and, when the switching event is identified, to switch from the basic mode to an additional mode in which the control unit transmits and/or receives data through the additional modem circuit.