Impact of Neighbor Awareness at the MAC Layer in a Vehicular Ad-hoc NETwork (VANET)
Date
2013-06
Authors
Booysen, Marthinus J.
Zeadally, Sherali
Van Rooyen, Gert-Jan
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE -- Institute of Electrical and Electronics Engineers
Abstract
Despite various proposed Medium Access Control
(MAC) approaches, efficient medium access in VANET remains
a significant challenge, especially for the broadcast of safety
messages. A key contributing factor to packet loss is the hidden
terminal problem, which is exacerbated by the high node mobility
apparent in VANET. Since the hidden terminal problem is fundamentally
a problem of lack of awareness, this work evaluates
the effects of increased neighbor awareness at the MAC layer.
An increased awareness of neighboring nodes’ slot allocation
in a TDMA-based MAC, directly impacts on the number of
available slots. Therefore, the effects of TDMA frame size is also
evaluated for different awareness ranges. To support the analysis,
a TDMA-based MAC with configurable neighbor awareness and
configurable TDMA frame size is introduced. The impact is
assessed using the packet delivery ratio, receiver throughput, and
end-to-end latency. The results show packet delivery ratio and
receiver throughput to increase for increased awareness ranges,
up to an optimal of 2 hops, after which performance worsens.
An increase in TDMA frame size leads to an increase in packet
delivery ratio for small awareness ranges, and an oscillating
increase for large awareness ranges. The receiver throughput
also initially increases for an increased TDMA frame size, but
reaches an optimum,also at 2 hops.
Description
The original publication is available at http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6698235&isnumber=6698215
Keywords
Vehicular ad hoc networks (Computer networks), VANETs, Intelligent transportation systems, Time division multiple access
Citation
Booysen, M. J., Zeadally, S. & Van Rooyen, G-J. 2013. Impact of neighbor awareness at the MAC layer in a Vehicular Ad-Hoc Network (VANET). Wireless Vehicular Communications (WiVeC), IEEE 5th International Symposium on , vol., no., pp.1,5, 2-3 June 2013 doi: 10.1109/wivec.2013.6698235