The traditional in-car bus systems based on a serial, event triggered protocol such as CAN and J1850 have been used in the body control area successfully for many years but bandwidth and speed restrictions will make it difficult for these to be used in the newer real time applications. A range of new bus standards have been emerging such as time triggered protocols and optical data busses to meet these new data through put challenges. In-car bus networks can be divided into four main categories as Body Control covering data and control signals between car seat controls, dashboard/instrument panel clusters, mirrors, seat belts, door lock and airbags (passive safety); Entertainment and Driver Information Systems communication and control between radio, web browser, CD/DVD player, telematics and infotainment systems; under the hood-networking between ABS brakes, emission control, power train and transmission; Advanced Safety Systems data transfer between brake-by-wire, steer-by-wire and driver assistance systems (active safety). This paper will first describe and position each emerging in-vehicle standard and their respective strengths and weaknesses. It will then explore the designers dilemma: how to build flexible and scalable system architectures which will allow the time in market of telematics platforms match that of the host vehicle whilst still communicating internally and to other external systems. It will then go on to discuss enabling technologies and how to implement reconfigurable and upgradeable telematics platforms that can cater for protocols today and in the future.
Telematics digital convergence - how to cope with emerging standards and protocols
Digitale Konvergenz von Fernübertragungen - Zusammenspiel mit Störfallstandards und -protokollen
2004
14 Seiten, 4 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
Convergence of Telematics Services
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