Abstract
Initially designed as a new mean in providing communication network between control units in automotive industries, the controller area network (CAN) has shown a great surge of interest due to its vast advantages. Since then it is widely used in various automation industries including military, aviation, electronics, factories and many others. CAN was designed to allow microcontrollers and devices to communicate with each other without the presence of a host computer and avoiding extensive load to the main controller. It is a high performance and high reliable advanced serial communication protocol which effectively supports distributed realtime control. Ideally, CAN is suitable in application requiring a large number of short messages with high reliability in rugged environment. These characteristics along with many others, allows wide opportunity in development of intelligent ubiquitous sensor network and controller system. This paper presents a brief introduction on CAN operating principles, its architecture and protocols. Also, various applications of CAN are introduced and surveyed with more attention given on smart home. Due to its reliability, efficiency and robustness, an extension of CAN applicants in home automation is proposed that uses sign language smart controller. Finally, this paper concludes with a proposed improvement by converting CAN into wireless CAN (WCAN) by using wireless token ring (WTRP) protocol. WCAN gives a solution when industrial mobile stations under certain constraints should continue to use CAN protocol as frame exchange protocol.
Highlights
In the past, devices and sensors in automotive industries are connected in a point to point wiring system which in turn causes the overall network system to be complicated, bulky, heavy and expensive [1]
This paper provides a comprehensive overview of controller area network (CAN), its architecture, protocols, standards and some of its implementation in various industries
This paper presents a brief overview of CAN
Summary
Devices and sensors in automotive industries are connected in a point to point wiring system which in turn causes the overall network system to be complicated, bulky, heavy and expensive [1]. The CAN was defined in International Standardization Organization (ISO) as a serial communication bus to replace the complex wiring harness with a two-wire bus It is a multi-master serial bus that broadcast messages to all nodes in the network system. CAN uses carrier sense multiple access protocol with collision detection (CSMA/CD) and arbitration on message priority as its communication protocol [9] - [11] This communication protocol allows every node in CAN to monitor the bus network in advance before attempting to transmit a message. When no activity occurs in the network, each node has the same opportunity to transmit a message This communication protocol allows collision to be solved using bit-wise arbitration, based on a preprogrammed priority of each message in the identifier field of a message. This has several important consequences such as system flexibility, message routing and filtering, multicast, together with data consistency [3]
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