Non-intermittent cooperative downloading approach for VANET

Yong XIE; bing WULi; xiang HEYan; Jing FAN; yi LIUBing

doi:10.11959/j.issn.1000-436x.2016022

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Non-intermittent cooperative downloading approach for VANET

Academic communication | 更新时间：2024-06-05

- Non-intermittent cooperative downloading approach for VANET
- Journal on Communications Vol. 37, Issue 1, Pages: 180-190(2016)
- 作者机构：
  
  1. 武汉大学计算机学院，湖北武汉 430072
  2. 景德镇陶瓷学院信息工程学院，江西景德镇 333403
  3. 武汉大学软件工程国家重点实验室，湖北武汉 430072
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61272112);The National Natural Science Foundation of China(61472287);Science and Technology Support Program of Hubei Province(2013BAA004)
- DOI：10.11959/j.issn.1000-436x.2016022
  CLC： TP393
- Online First：2016-01，
  
  Published：25 January 2016
- 稿件说明：
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Yong XIE, bing WULi, xiang HEYan, et al. Non-intermittent cooperative downloading approach for VANET[J]. Journal on Communications, 2016, 37(1): 180-190.
DOI：

Yong XIE, bing WULi, xiang HEYan, et al. Non-intermittent cooperative downloading approach for VANET[J]. Journal on Communications, 2016, 37(1): 180-190. DOI： 10.11959/j.issn.1000-436x.2016022.

摘要

车辆通过AP(access points)接入Internet具有低费用、高带宽以及低时延等优点，然而AP间的通信盲区(DA

dark area)使车辆只能间歇式接入Internet，造成网络的QoS难以得到保障。为了解决这一问题，提出一种面向高速公路场景的无间隙协助下载方法(NICDM

non-intermittent cooperative downloading method)。在NICDM中，目标车辆未完成的下载任务依据车速、任务大小以及DA距离等信息进行分解，并分别委托行驶方向上的最近2个AP 协助下载；一组经过优化选择的协助车辆从AP获得数据，并在DA区转交给相遇的目标车辆；同时针对传输冲突提出了N-副本的冲突解决策略，进一步提高协助下载的稳定性。仿真结果表明，NICDM实现了目标车辆在整个DA区无间隙地获得数据，与相类似的方法相比，进一步提高了系统的QoS与吞吐量。

Abstract

Internet access through access points (AP) for vehicles has the advantages of low cost

high-bandwidth and low latency. However

because of dark area (DA) around AP

vehicles have to take interm tent linking to Internet

result-ing in the QoS of network is difficult to be guaranteed.A non-intermittent cooperative downloading method (NICDM)for highway was proposed. The unfinished download task of target vehicular in current AP was decomposed into several parts according to vehicle's speed

the size of unfinished task and distance of DA

then commissioned to two nearest APs. A group of cooperative vehicles selected under selection strategy would get data from the APs and forward it to the target vehicle when theymeet in DA.And an N -replicaconflict resolution strategy was used to improve the stability of coopera-tive downloading. Simulation results show that compared with similar cooperative methods

NICDM can uninterruptedly get cooperative download data through DAs and improve system's QoS and throughput.

关键词

Keywords

references

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