摘要
由于在智能交通系统(ITS)和车载娱乐中广阔的应用前景,车联网吸引着越来越多的关注,它具有如下特征:高速移动性、网络拓扑结构变化快、断网频率高等等。当漫游时,无线接入点的覆盖范围有限与终端用户期望得到连续的网络服务明显产生冲突,如何实现无缝切换成为其中的关键点。文章通过介绍车联网的相关概念,并与车联网的具体应用场景和实际特点相结合,对车联网无线通信的切换延迟进行研究,在linux操作系统上配置双网卡模拟车载单元,并在此基础上给出了实现代码,测试表明,双网卡的切换时间缩短很多,大大提高了切换速度,从而保障车联网应用的正确性、稳定性和可靠性。
Internet of vehicles is attracting more and more attentions, since its wide application prospect in Intelligent Transportation System （ITS） and vehicular entertainments. It has the characteristics as follows： high movement speed, high dynamic topology, frequently disconnected network, and so on. When roaming, the limited wireless access point range and end-user expectation of continuous network service obvious conlfict, how to realize the seamless switching to become one of the key points.through the introduction of the related concepts of vehicle network, combined with speciifc application scenarios and the actual characteristics of vehicle networking, we study the vehicle networking wireless switch delay in this paper, and simulate On-board unit by settling double NICs on the Linux operating system ,on this basis,we describe the realization of the code,the result shows the switching time of the double INC shorten a lot , greatly improve the switching speed, so as to guarantee the correctness of the networking application, stability and reliability.
出处
《无线互联科技》
2015年第7期17-19,25,共4页
Wireless Internet Technology
关键词
车联网
无缝切换
延迟
双网卡
LINUX
Vehicle networking
Seamless switching
Delay
Double INCs
Linux
