Adaptive Beaconing for Delay-Sensitive and Congestion-Aware Traffic Information Systems

Language
en
Document Type
Report
Issue Date
2010-11-18
Issue Year
2010
Authors
Sommer, Christoph
German, Reinhard
Dressler, Falko
Editor
Abstract

We present a new car-to-X communication protocol, Adaptive Traffic Beacon (ATB), which supports the exchange of delay-sensitive traffic information in a wide range of scenarios by flexibly adapting to the availability of infrastructure elements as well as to the network load. From previous work, we see that centralized solutions and flooding based approaches each show benefits and drawbacks depending on traffic density, penetration, network utilization, and other parameters. This observation is in line with findings about intelligent transportation systems that have been developed for specific settings. In order to overcome this limitation, we designed ATB to be adaptive in two dimensions: First, the beacon interval is adapted dynamically and, secondly, the protocol can dynamically make use of available infrastructure elements. We concentrate on a Traffic Information System (TIS) with a focus on congestion-aware communication. Simulation experiments clearly demonstrate that ATB performs well in a broad range of settings. It maintains a non-congested wireless channel to prevent collisions during TIS data exchange.

Series
Technical reports / Department Informatik
Series Nr.
CS-2010-01
DOI
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