A Location-based MAC Protocol For
Safety-of-life Vehicle-to-vehicle Communication
Author(s)
C. R. Garcia, T. Strang & A. Lehner
Abstract
Safety of life applications have high importance in today’s traffic as current statistics
show. In particular active safety applications are at the center of research activities,
focussing on vehicle to vehicle communications as it is easier and cheaper
to deploy as well as more effective in most situations. This approach has also
to be followed for railway traffic. However, different vehicle types have different
characteristics and therefore different requirements to their communication systems
and the communication networks in particular. We identified here the need
for an adapted Medium Access Control (MAC) protocol, called the Cell-based
Orientation-aware MANET Broadcast (COMB) protocol, that fulfills the requirements
of the train specific scenario and overcomes the drawbacks of all existing
approaches. COMB is based on localization aware cross layer dimensioned
CDMA cells, and uses the SOTDMA protocol as am intra cell scheme, while the
inter cell scheme relies on direction and speed awareness. Therefore, it can cope
with the trains’ speed and their need for a robust communication.
1 Introduction
Current statistics of the International Union of Railways (UIC) show that there are
three significant train accidents in Europe every day [1], despite millions of Euros
which have been invested in trackside and in-train safety equipment. In order to
increase safety in railway traffic, some countries are partially installing control systems,
mainly centralized management ones, specially the Automatic Train Control
(ATC), where the trains are monitored by devices located along the rail. These
devices send the collected information to an operation center that can pass specific
instructions to the train. A European ATC standard, European Train Control Sys-
Keywords
Related Book
Other papers in this volume
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