Optimised CSMA protocol to support efficient clustering for vehicular internetworking
File(s)
Published version
Author(s)
Rossi, G
Leung, KK
Type
Conference Paper
Abstract
Vehicular ad-hoc networks (VANETs) that support
communication among vehicles can facilitate a wide range of
road-safety applications. To deal with network fragmentation
for low vehicular density, clusters of neighbouring vehicles can
be formed. Clustering techniques also require timely commu-
nications among vehicles. Despite the stringent performance
requirements for the safety and clustering applications, the
IEEE 802.11p standard still employs the carrier sensing medium
access/collision avoidance (CSMA/CA) protocol that has a fixed
contention window (CW) range for backoff. This results in
significant inefficiency as vehicular density changes. This work
investigates how the maximum CW size can be optimised to
enhance performance based on vehicular density by exploiting
the equivalence between the CSMA/CA and Aloha performance
models. Simulation shows a great reduction in transmission delay
for the proposed protocol when compared with the standardised
one. Thus, with the low latency, the new protocol is useful to the
vehicle clustering and road-safety applications.
communication among vehicles can facilitate a wide range of
road-safety applications. To deal with network fragmentation
for low vehicular density, clusters of neighbouring vehicles can
be formed. Clustering techniques also require timely commu-
nications among vehicles. Despite the stringent performance
requirements for the safety and clustering applications, the
IEEE 802.11p standard still employs the carrier sensing medium
access/collision avoidance (CSMA/CA) protocol that has a fixed
contention window (CW) range for backoff. This results in
significant inefficiency as vehicular density changes. This work
investigates how the maximum CW size can be optimised to
enhance performance based on vehicular density by exploiting
the equivalence between the CSMA/CA and Aloha performance
models. Simulation shows a great reduction in transmission delay
for the proposed protocol when compared with the standardised
one. Thus, with the low latency, the new protocol is useful to the
vehicle clustering and road-safety applications.
Date Issued
2017-03-30
Date Acceptance
2017-01-20
Citation
2017
Publisher
IEEE
Copyright Statement
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor
Defence Science and Technology Laboratory (DSTL)
Defence Science and Technology Laboratory (DSTL)
Defence Science and Technology Laboratory (DSTL)
Grant Number
DSTLX1000064099
DSTLX1000064099
Source
IEEE Wireless Communications and Networking Conference (WCNC) 2017
Publication Status
Accepted
Start Date
2017-03-19
Finish Date
2017-03-22
Coverage Spatial
San Francisco, California