Overview
Friends who are familiar with the vehicle electronic architecture know that the Gateway coordinates the exchange of data from different physical links in the vehicle network architecture and plays a data center role. This article introduces the application of Gateway in the AUTOSAR architecture.
In the AUTOSAR architecture, Signals, Signal Groups or PDUs are received from a source bus and can be sent to a bus of the same or different protocols. There are two types of Gateways in the AUTOSAR architecture, namely Signal Gateway and PDU Gateway.
The following is the AUTOSAR communication architecture diagram. On the way, the PduR module can route PDUs for the upper and lower modules, and can route PDUs for the lower-layer buses of different protocols (such as CAN, LIN, FlexRay). Routing PDUs between different lower-layer protocol buses is the PDU Gateway. mechanism. For Signal Gateway, it is implemented by the COM module.
Gateway relationship diagram in AUTOSAR communication architecture
Signal Gateway
Signal Gateway is implemented through the COM module in AUTOSAR.
The COM module maps received Signals or Signal Groups to single or multiple transmitting Signals or Signal Groups. Once a Signal Gateway receives a Signal or Signal Group for a gateway, it immediately acts as the sender of that Signal or Signal Group.
Signal Gateway uses the packaging/unpacking mechanism and timeout processing mechanism provided by the COM module.
PDU Gateway
In AUTOSAR