| Telematics Services in Hybrid Networks Traffic- or media-related information may be delivered to
(and from) cars and/or drivers in many different ways and
via various communication or distribution systems. This
cooperation with partner BMW AG focuses on a hybrid network
in which different classes of messages with specific
quality-of-service (QoS) requirements are transmitted to
cars either via a broadcast or a point-to-point channel,
more specifically either via the DAB system (Digital Audio
Broadcasting) or via GSM (Global System for Mobile
Communications). For example, urgent traffic control
messages need to be received with tightly bounded delays,
whereas some media streams are more sensitive to jitter
(i.e., variability of interarrival times). On the other
hand, only a limited capacity of the DAB broadcasting
caroussel might be contracted for a fixed cost, while
overflow traffic must be delivered by GSM services causing
additional expenses.
Detailed simulation models as well as compact analytical
models are developed to determine the minimal cost for
meeting the QoS requirements in such hybrid networks. | Projektleitung:
Dr.-Ing. Armin Heindl
Beteiligte:
Prof. Dr.-Ing. Reinhard German
Stichwörter:
telematics; car information systems; GSM; DAB; simulation
Laufzeit: 1.1.2004 - 30.6.2006
Förderer:
BMW AG (Munich)
Mitwirkende Institutionen:
Science of Traffic Policy, Traffic Technology (EW-1, BMW)
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| Hu, Jing ; German, Reinhard ; Heindl, Armin ; Kates, Ronald ; Unbehaun, Matthias: Traffic modelling and cost optimization for transmitting traffic messages over a hybrid broadcast and cellular network. In: n.b. (Hrsg.) : Proc. 8th Int. IEEE Conf. on Intelligent Transportation Systems (ITSC Vienna, Austria September 2005). 2005, S. .. |