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DESIGN AND IMPLEMENTATION OF CAN CAN / CAN , ETHERNET AND CAN / ATM BRIDGES
Authors: Hüseyin Ekiz, Osman Çerezci
Number of views: 459
The Controller Area Network (CAN) is a high performance
and highly reliable advanced serial communication
protocol which efficiently supports distributed real-time
control systems at high speed, low cost, and a very high
level data security. The CAN was originally developed as
an automotive standard for a serial interface between
electronic control units, but in a short time, it has become
a desirable, cheap solution for networks in industrial
environments. The fast growth of the CAN in industrial
applications results some potential problems such as the
size of the area that the devices, controlled by the CAN,
are distributed and the communication between the CAN
and the existing network systems (such as Ethernet or
ATM).
One of the solutions to these problems is to use bridges.
However, the characteristics of the CAN creates problems,
when CAN segments are connected by a bridge, since
CAN frames do not contain any information related to
destination address, source address, or LAN number that
are used by traditional address-hased bridges for routing
decisions. Thus, new bridges (suitable for the CAN
protocol features) must be designed to overcome the
problems.
The objective of this paper is not only to investigate the
characteristics of bridged CAN systems and to give a
bridge proposal to connect CAN segments, but also to
design and implement bridges that connect the CAN and
existing LAN s and provide communication between them.