7. WAVE Media Access Control Layer

  1. Luca Delgrossi1 and
  2. Tao Zhang2

Published Online: 13 SEP 2012

DOI: 10.1002/9781118452189.ch7

Vehicle Safety Communications: Protocols, Security, and Privacy

Vehicle Safety Communications: Protocols, Security, and Privacy

How to Cite

Delgrossi, L. and Zhang, T. (2012) WAVE Media Access Control Layer, in Vehicle Safety Communications: Protocols, Security, and Privacy, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118452189.ch7

Author Information

  1. 1

    Mercedes-Benz R&D North America, Inc., USA

  2. 2

    Cisco Systems, Inc., USA

Publication History

  1. Published Online: 13 SEP 2012
  2. Published Print: 5 OCT 2012

Book Series:

  1. Wiley Series on Information and Communication Technology

Book Series Editors:

  1. T. Russell Hsing and
  2. Vincent K. N. Lau

ISBN Information

Print ISBN: 9781118132722

Online ISBN: 9781118452189

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Keywords:

  • MAC layer modeling;
  • media access control (MAC) layer;
  • network simulator 2 (ns-2);
  • wireless access in vehicular environments (WAVE)

Summary

At the media access control (MAC) layer, the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards specifies channel access operations using carrier sensing multiple access with collision avoidance (CSMA/CA). The IEEE 802.11 MAC layer adopts enhanced distributed channel access (EDCA) to offer four different traffic classes or access categories. The key purpose of IEEE 802.11p MAC layer amendments is to enable efficient communication setups while significantly reducing the associated overheads. Traditional IEEE 802.11 MAC layer operations are too time consuming for wireless access in vehicular environments (WAVE). In the network simulator 2 (ns-2) implementation MAC layer operations are modeled through six separate modules: transmission, reception, channel state manager, back-off manager, transmission coordination, and reception coordination. The overhauled ns-2 implementation allows to model greater details of frame transmission and reception operations.

Controlled Vocabulary Terms

media access protocol; modelling; vehicular ad hoc networks