Vehicular channel characterization and its implications for wireless system design and performance
Författare
Summary, in English
To make transportation safer, more efficient, and less harmful to the environment, traffic telematics services are currently being intensely investigated and developed. Such services require dependable wireless vehicle-to-infrastructure and vehicle-to-vehicle communications providing robust connectivity at moderate data rates. The development of such dependable vehicular communication systems and standards requires accurate models for the propagation channel in all relevant environments and scenarios. Key characteristics of vehicular channels are shadowing by other vehicles, high Doppler shifts, and inherent non-stationarity, which have major impact on the data packet transmission reliability and latency. This paper provides an overview of the existing vehicular channel measurements in a variety of important environments, and the observed channel characteristics (such as delay spreads and Doppler spreads) therein.We briefly discuss the available vehicular channel models and their respective merits and deficiencies. Finally, we discuss the implications for wireless system design with a strong focus on IEEE 802.11p. On the road towards a dependable vehicular network, room for improvements in coverage, reliability, scalability, and delay are highlighted which require evolutionary improvements in the IEEE 802.11p standard. Multiple antennas
at the on-board units and road-side units are recommended to exploit spatial diversity for increased diversity and reliability. Evolutionary improvements in the PHY and MAC are required to yield dependable systems. Extensive references are provided.
at the on-board units and road-side units are recommended to exploit spatial diversity for increased diversity and reliability. Evolutionary improvements in the PHY and MAC are required to yield dependable systems. Extensive references are provided.
Avdelning/ar
Publiceringsår
2011
Språk
Engelska
Sidor
1189-1212
Publikation/Tidskrift/Serie
Proceedings of the IEEE
Volym
99
Issue
7
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE Press
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- radio channel characterization
- vehicular communications
- IEEE 802.11p
- OFDM
- MIMO
- intelligent transportsystems
Status
Published
Forskningsgrupp
- Radio Systems
ISBN/ISSN/Övrigt
- ISSN: 0018-9219