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Physical Media Issues for High Speed Vehicle Networks
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Event:
Multiplexing Conference
Language:
English
Abstract
The evolution of vehicle electronics has resulted in corresponding changes in how vehicle communications networks are being used. Initially used for diagnostic and low speed data sharing applications, networks are increasingly being used for real time control applications that require significantly higher data rates. While high speed networking technology has been primarily developed for office LAN and telecommunications applications, the requirements of in-vehicle communication networks differ significantly from their office and factory counterparts. This paper will examine the issues involved in choosing a physical layer for a vehicle network including: media bandwidth, electromagnetic compatibility (EMC) requirements, fault tolerance, serviceability requirements, ability to meet vehicle environmental requirements, network architecture limitations, and cost. This paper will also show that for application data rates above 250Kbps, plastic optical fiber (POF) is the lowest cost, highest performance network medium. It will also show that, unshielded twisted pair wiring (UTP) provides the best solution for data rates under 125KBps. For data rates between 125Kbps and 250Kbps, the optimal medium is application dependent.
Authors
Topic
Citation
Cirillo, J., Jennings, K., Lynn, M., and Steele, R., "Physical Media Issues for High Speed Vehicle Networks," SAE Technical Paper 941656, 1994, https://doi.org/10.4271/941656.Also In
References
- Internal Packard Electric EMC Performance Data
- Mitsubishi Rayon Performance Data
- Doan, Q. Lynn, M. Steele, R. “Diagnostic Procedures for Passive Optical Star Vehicle Networks” SAE International Congress & Exposition Detroit, Michigan FEB 28 MAR 3 1994
- Cirillo, J.R. Jennings, K. L. Lynn, M.A. Steele, R.E. “A Plastic Optical Fiber Termination System Designed for Automotive Manufacturing, Assembly, and Service Environments” SAE International Congress & Exposition Detroit, Michigan FEB 24-28 1992