Onboard Unit Near-Range Module Segmentation for Power Demand
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Solution Overview
Problem
Onboard units for traffic telematics systems face challenges in extending battery service life while incorporating additional functionalities, as existing power-saving modes can be disrupted by increased power demands from additional features.
Innovation Solution
Incorporating a near-range radio communication module, such as NFC, which allows for power-supplied communication without activating the power-intensive far-range communication module, enabling additional functionalities like data input and retrieval without affecting battery life, using either internal power or radio-supplied power for memory access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a near-range radio communication module is added to enable additional functionalities, then the versatility and functionality of the onboard unit is improved, but the power demand and battery service life are worsened
Solution Approach 1:
The communication system is segmented into two independent modules: a far-range communication module (DSRC/WLAN/Bluetooth) and a near-range communication module (NFC). Each module operates independently with its own power management, allowing the near-range module to handle additional functionalities without activating the power-intensive far-range module, thus resolving the contradiction between enhanced functionality and power consumption.
Solution Approach 2:
The near-range communication module is designed to access memory and perform operations autonomously without requiring the far-range communication module to be activated. The module serves itself by handling local communication tasks independently, eliminating the need for additional power supply to the main system and preserving battery service life.
2Reliability
If the far-range communication module is activated for memory access, then the communication capability is improved, but the power consumption increases and battery service life decreases
Solution Approach 1:
Memory access functionality is segmented between two communication modules: the near-range module handles local memory access operations while the far-range module remains dormant. This segmentation allows reliable communication capability to be maintained for local operations without activating the power-intensive far-range module, thus preserving battery service life.
Solution Approach 2:
The near-range communication module is designed with multi-functionality, capable of both near-range communication and memory access operations. This universal design eliminates the need to activate the far-range module for memory access, maintaining communication reliability while reducing power consumption and extending battery service life.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for extended battery life by enabling additional functionalities without significantly increasing power demand, allowing configuration data input and transaction data retrieval without loading the main communication components, ensuring reliable operation and secure vehicle linking.
Implementation Method 1
a first communication module, designed for near-range radio communication with a first external communication device
Implementation Method 2
a second communication module, designed for far-range radio communication with a second external communication device
Data Source
AI summary
The present subject matter relates to an onboard unit for a traffic telematics system, comprising: a first communication module, designed for near-range radio communication with a first external communication device, a second communication module, designed for far-range radio communication with a second external communication device, and a non-volatile memory, which can be accessed both by the first and the second communication module, wherein each communication module has a power-supplied communication mode and a powerless or power-saving rest mode, and wherein the power supply of the memory during an access thereto is effected by the accessing communication module. The present subject matter further relates to an onboard system for a vehicle comprising such an onboard unit, and to a communication device for said system.