Master-Slave Sensor Control Architecture for Vehicle Data Bus Load Reduction
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Solution Overview
Problem
Existing communication devices for motor vehicles experience excessive data bus loads, which can impair other functionalities due to the high volume of data-intensive application data transmitted between sensor control units and central control units.
Innovation Solution
A communication device with a master-slave configuration for sensor control units, where preprocessed sensor data is exchanged via a third data bus, reducing the load on the primary data bus by designating one sensor control unit as the master for data-intensive functionalities and another as the slave for less intensive data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor control units transmit data-intensive application data via the primary data bus, then complete sensor information is available to the central control unit, but the data bus load becomes excessive and impairs other functionalities
Solution Approach 1:
The patent segments the data transmission responsibilities by introducing a master-slave architecture among sensor control units. The master sensor control unit handles data-intensive functionalities and transmits processed data to the central control unit, while slave sensor control units transmit only essential data. This segmentation reduces the overall data bus load while maintaining complete sensor information availability through the master unit's comprehensive data processing capabilities.
Data Source
AI summary
A communication device for a motor vehicle includes a first control unit (BDC), a second control unit (SAS), a control unit arrangement (SGA), a first data bus (SB), to which the first control unit (BDC) and the control unit arrangement (SGA) are connected for the exchange of data, as well as a second data bus (AB), to which the second control unit (SAS) and the control unit arrangement (SGA) are connected for the exchange of data. The control unit arrangement includes at least a first sensor control unit (SSG1) for controlling a first sensor and a second sensor control unit (SSG2) for controlling a second sensor. The first and the second sensor have mutually overlapping sensor acquisition ranges. The first and the second sensor control unit can exchange at least preprocessed sensor data by way of a third data bus (PB). The first and the second sensor control unit are constructed to be operated in a master-slave operation with respect to at least one functionality. By way of the first sensor control unit as the master of a first functionality (F1), first data (DFC), which are provided by the first control unit at the first data bus, are processed for the control unit arrangement. By way of the second sensor control unit as the master of a second functionality (F2), first application data (AD1) for the second control unit are provided at the second data bus.