Hardware-Accelerated Protocol Conversion in an Automotive Gateway Controller

摘要

A network gateway in a vehicle connects heterogeneous networks and buses within the vehicle. The gateway implements hardware acceleration to accomplish protocol translation, e.g., between CAN, LIN, Flexray, and Ethernet buses and networks. In particular, the gateway provides hardware accelerated packet filtering, header lookup, and packet aggregation features.

主权项

1. A gateway comprising:
multiple different communication interfaces comprising:
a protocol A interface;a protocol B interface; buffer circuitry coupled to the protocol A interface and configured to receive a message on the protocol A interface, the message comprising:
a message identifier; anda message payload; a translation table for a destination network interface, the translation table comprising a mapping from the message identifier to a pre-defined protocol B header for that message identifier; and control circuitry configured to:
receive the pre-defined protocol B header;receive the message payload;prepare a protocol B message comprising the pre-defined protocol B header and the message payload; andtransmit the protocol B message through the protocol B interface.