Synchronization challenges in media access coordination for vehicular ad hoc networks

被引：5
作者：
Blum, Jeremy J. [1 ,3 ]
Natarajan, Rajesh [1 ]
Eskandarian, Azim [2 ]
机构：
[1] Penn State Univ, Dept Comp Sci & Math Sci, Harrisburg, PA USA
[2] George Washington Univ, Ctr Intelligent Syst Res, Ashburn, VA USA
[3] Penn State Univ, Capitol Coll, University Pk, PA 16802 USA
来源：
WIRELESS COMMUNICATIONS & MOBILE COMPUTING | 2011年 / 11卷 / 07期
关键词：
VANETs; Timeslot Boundary Synchronization; wireless access in vehicular environments; emergency messages; vehicle heartbeat messages; SERVICE DIFFERENTIATION;
D O I：
10.1002/wcm.921
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Vehicular ad hoc networks (VANETs) can support a wide range of future cooperative safety and efficiency applications. However, the node density and high demand for wireless media in these networks can lead to the Timeslot Boundary Synchronization Problem, in which increased transmission collisions occur due to back-off timer synchronization. This paper proposes an enhancement to the wireless access in vehicular environments (WAVE) communications architecture to address this problem, called RAndom Propagation Initiation Delay for the Distributed Coordination Function (RAPID DCF). The effectiveness of RAPID DCF is evaluated through simulations of both single-hop and multi-hop emergency messages. In these simulations, RAPID DCF was able to improve message delivery rates by as much as 35% and reduce multi-hop message latency by as much as 18%. Copyright (C) 2010 John Wiley & Sons, Ltd.
引用
收藏
页码：954 / 963
页数：10
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