FLEXRAY-CAN GATEWAY STRUCTURE AND MESSAGE MAPPING METHOD

摘要

A FlexRay-CAN(Controller Area Network) gateway structure and a message mapping method are provided to reduce an influence of an overhead and an increase in a delay time caused by conversion of a transmission method between a CAN and a FlexRay each having a different transmission method. A message mapping table(270) stores and manages information about several signals included in CAN and FlexRay messages. A message filter(220) filters the CAN message based on the message mapping table(270), and divides and transmits it via an arbiter(230). A time-division-based queue(260) transmits a signal transmitted by the message filter(220) to a fixed slot(310) of a FlexRay network(300) at every time slot. A priority-based queue(250) attempts transmission of the signal which has been transmitted by the message filter(220) at every cycle, and when its priority level comes, the priority-based queue(250) transmits the signal to a variable slot(320) of the FlexRay network(300). If its priority level does not come, the priority-based queue(250) waits. A message filter(222) filters the FlexRay message based on the message mapping table(270) and transmits it. A priority-based queue(252) stores the signal which has been transmitted by the message filter(222) in a queue with determined CAN IDs, and when signals are all stored in the IDs, the priority-based queue(252) transmits them to a CAN network(100) via the arbiter(232) according to each priority level. A controller(210) controls each element and performs message conversion and transmission based on the message mapping table(270).