篇名：Design of Seamless Handoff Control Based on Vehicular Streaming Communications
作者：Hsu-Yang Kung,Chi-Hua Chen*(陈志华),Mei-Hsien Lin,Tai-Yang Wu
来源：Journal of Internet Technology
年份：2019
DOI: 10.3966/160792642019122007007
文章摘要：
Because vehicles run in high speed environments, it is difficult to establish the topology of the network. Moreover, data transmission may be interrupted by the handoff of various APs. This study established the network of roadside-to-vehicle (R2V) environment, and used the DSRC (dedicated short range communication) to achieve seamless handoff control on a streaming service. To achieve this goal, this study first used the GPS (global positioning system) to collect vehicular information (e.g., speed, direction, and location), and subsequently exchanged the parameter of vehicular information at both ends by DSRC. Therefore, the computer in the vehicle can predict the link expiration time (LET) between two mobile nodes. Furthermore, this study used two cases of handoff in vehicular networks. One case was non-overlapping handoff, and the other case was overlapping handoff. A simple formula was designed to calculate vehicular total buffer size in these two cases, and to adjust the data flow to the receiver. Finally, this study used the network simulator to simulate the actual situation of vehicular motion and network transmission. This study proved the accuracy and feasibility of mechanism through the simulation result. This study achieved the streaming of seamless handoff control in the network of R2V.
由于车辆运行在高速环境中，因此很难建立网络拓扑。此外，数据传输可被各种AP的切换中断。本研究建立了路侧到车辆（R2V）环境的网络，并使用DSRC（专用短程通信）在流媒体服务上实现无缝切换控制。为了实现这一目标，本研究首先使用GPS（全球定位系统）收集车辆信息（例如速度、方向和位置），然后通过DSRC交换两端的车辆信息参数。因此，车辆中的计算机可以预测两个移动节点之间的链路到期时间（LET）。此外，本研究使用了车辆网络中的两种切换情况。一种情况是非重叠切换，另一种情况是重叠切换。设计了一个简单的公式来计算这两种情况下的车辆总缓冲区大小，并调整到接收器的数据流。最后，本研究利用网络模拟器来模拟车辆运动和网络传输的实际情况。通过仿真结果验证了该机构的准确性和可行性。本研究实现了R2V网络中无缝切换控制的流化。