Master Subscriber Station for High-Speed CAN Bus Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional CAN bus systems face challenges in increasing data transmission rates without increasing the number of buses, leading to higher costs due to the need for multiple CAN protocol controllers to manage communication with numerous subscriber stations, and existing solutions require significant modification and testing when adding additional sensors.
Innovation Solution
A master subscriber station with multiple transceiver devices and a communication control device that allows for efficient data transmission across sub-buses, enabling high data rates while reducing the need for multiple bus protocol controllers, and allowing for retroactive addition of sensors without extensive modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the data transmission rate is increased by reducing the number of subscribers on the bus, then the data rate is improved, but the number of required CAN buses increases
Solution Approach 1:
The bus system is divided into multiple sub-buses, each operating independently at high data rates. The master subscriber station coordinates communication across these segmented sub-buses, allowing high-speed data transmission without requiring a single overloaded bus.
Solution Approach 2:
The master subscriber station acts as an intermediary between slave subscriber stations on different sub-buses. It receives data from one sub-bus and forwards it to another, enabling high-rate communication between sensors and control devices without direct peer-to-peer connections across all subscribers.
2Adaptability or versatility
If multiple CAN protocol controllers are equipped in microcontrollers to manage communication with a large number of subscriber stations, then the communication capability is improved, but the costs of the bus system increase
Solution Approach 1:
The master subscriber station performs multiple functions: it acts as a slave on one sub-bus, a master on another sub-bus, and a router between them. This multi-functional design eliminates the need for separate CAN protocol controllers in microcontrollers, reducing system costs while maintaining high communication capability.
Solution Approach 2:
The patent combines the roles of multiple CAN protocol controllers into a single master subscriber station. Instead of having separate controllers in each microcontroller for managing multiple buses, one station consolidates these functions, reducing the quantity of expensive protocol controllers required.
3Adaptability or versatility
If additional sensors are added to an existing bus system, then the sensor coverage is improved, but the modification and testing outlay increases
Solution Approach 1:
Sensors are added to existing sub-buses rather than requiring modification of the entire bus system. Each sub-bus can be independently configured and tested, reducing the modification and testing outlay when adding new sensors to the system.
Data Source
AI summary
Subscriber-stations for a bus-system, and data-transmission method in a bus-system. The subscriber-stations include master-subscriber-station(s) and at least two slave-subscriber-stations for the bus-system. The master-subscriber-station includes a first-transceiver-device for sending/receiving a message to/from at least one slave-subscriber-station that is subordinate control-wise to the master-subscriber-station, via a first-sub-bus of the bus-system, a second-transceiver-device for sending/receiving a message to/from at least one other subscriber-station, via a second-sub-bus of the bus-system, a communication-control-device for creating the message to be sent or for evaluating a message received from one of the sub-buses of the bus-system, and a linking-device for linking a terminal of the first-transceiver-device that is for outputting of a signal generated from the message received from the first-sub-bus and a terminal of the second-transceiver-device for outputting a signal generated from the message received from the second-sub-bus, so that only one signal is forwarded, as a receive-signal, to a communication-control-device terminal.