Portable Telematics via CAN Bus Integration
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Solution Overview
Problem
Current automobile navigation systems and portable devices are not effectively integrated, failing to utilize software/hardware resources and transmit data efficiently, leading to increased costs and limited functionality.
Innovation Solution
A portable telematics device connected via a specific control data bus that supports multiple protocols, enabling integration with an automobile navigation system, allowing for independent operation and access to satellite navigation, digital entertainment, and personal data management, both inside and outside the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GPS modules are connected to PDAs through RS-232 or USB, then the GPS function is added to PDA, but the functions of the two devices cannot be integrated and software/hardware resources cannot be fully utilized
Solution Approach 1:
The patent applies the universality principle by using the CAN bus interface, which is a multi-functional communication protocol originally designed for automobile systems. By making the GPS module compatible with CAN bus, it can communicate with both the PDA and the automobile navigation system through the same interface, enabling one interface to serve multiple functions and devices without requiring separate RS-232 or USB connections.
Solution Approach 2:
The patent merges the communication functions of the GPS module with the automobile's existing CAN bus system. Instead of treating the GPS module as a separate device requiring its own communication interface, it integrates the GPS communication into the existing CAN bus infrastructure, allowing data exchange between the GPS module, PDA, and navigation system through a unified communication channel.
2Adaptability or versatility
If data is transmitted between automobile navigation system and portable device through wired or wireless means, then data can be transferred, but the connection cannot integrate functions of the two devices and cannot make good use of software/hardware resources
Solution Approach 1:
The patent makes the portable device's communication interface universal by implementing CAN bus protocol support. This allows the same interface to handle multiple communication tasks: GPS data reception, navigation data transmission, and system control signals, thereby maximizing resource utilization without requiring separate dedicated connections for each function.
Solution Approach 2:
The system allows the portable device to autonomously manage its communication with the automobile navigation system through the CAN bus interface. The device can independently establish connections, exchange data, and maintain communication without requiring complex external control systems, thereby simplifying the overall connection architecture while improving resource utilization.
3Adaptability or versatility
If conventional connection methods are used between automobile navigation system and portable device, then connection is established, but cost increases and functionality is limited
Solution Approach 1:
By adopting the CAN bus interface, which is already standard in automobile systems, the patent eliminates the need for additional specialized communication hardware and protocols. This universal interface approach reduces component costs while simultaneously expanding system functionality to include seamless integration with the automobile's existing telematics infrastructure.
Solution Approach 2:
The patent leverages the existing CAN bus communication protocol already widely used in automobile systems. By copying and adapting this established protocol for use between the portable device and navigation system, the invention avoids the need to develop new communication standards, thereby reducing development and manufacturing costs while ensuring compatibility with existing automobile systems.
Data Source
AI summary
An automobile navigation system with portable telematics device is disclosed, which comprises: a first telematics device, being arranged fixedly inside an automobile; a detachable second telematics device, capable of being coupled to the first telematics device by a specific control data bus; wherein, the resources of software/hardware of the second telematics device are accessible to the first telematics device while the second telematics device is connected to the first telematics device; and the second telematics device is capable of working independently and thus being used by a user as a personal data assistant while the second telematics device is detached from the first telematics device.