Towards real-time media access in vehicular ad-hoc networks
Authors:
- 1 April 2012
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 388-392
Abstract
By giving vehicles the ability to propagate warning messages to the other ones, the number and the severity of accidents on our streets could likely be reduced. Safety-related applications based on vehicular ad-hoc neworks (VANET) are usually dependent on transmitting a message from source to sink within a given time limit. IEEE proposes the standard 802.11p which is an adaption of the well-known Wireless LAN 802.11a for inter-vehicle communication. While many properties have been improved, 802.11p still comes with a contention-based medium access control, only. This leads to an indeterminism and data-dependencies. One deterministic and fairer alternative compared to contention based medium access mechanism would be Time-Divison Multiple Access (TDMA). As a VANET is typically fully self-organizing, the time slots must be assigned autonomously by the nodes of the distributed system. This, however, leads to drawbacks in the performance of the protoctol which are analyzed in this paper.Keywords
This publication has 5 references indexed in Scilit:
- Comparison of CSMA and TDMA for a Heartbeat VANET Application2010
- On the Ability of the 802.11p MAC Method and STDMA to Support Real-Time Vehicle-to-Vehicle CommunicationEURASIP Journal on Wireless Communications and Networking, 2009
- Interactive Realistic Simulation of Wireless Networks2007
- On the impact of a more realistic physical layer on MANET simulations resultsAd Hoc Networks, 2006
- CDMA-based MAC protocol for wireless ad hoc networks2003