VehCom: Delay-Guaranteed Message Broadcast for Large-Scale Vehicular Networks
VehCom: Delay-Guaranteed Message Broadcast for Large-Scale Vehicular Networks
复制标题
DOI：
10.1109/twc.2021.3054300
复制
发表时间：
2021-06
影响因子：
10.4
通讯作者：
Huacheng Zeng;Hossein Pirayesh;Pedram Kheirkhah Sangdeh;Adnan Quadri
中科院分区：
文献类型：
--
作者：
Huacheng Zeng;Hossein Pirayesh;Pedram Kheirkhah Sangdeh;Adnan Quadri
及时的车对车（V2V）通信是智能交通系统提高驾驶安全性和效率的关键组成部分。尽管针对车辆网络已经取得了许多成果，但其中大多数都侧重于提高车辆通信容量和可靠性。到目前为止，在针对大规模车辆网络设计实用的V2V通信方案方面进展非常有限。在本文中，我们提出了VehCom，一种用于V2V通信网络的完全分布式消息广播方案。VehCom在为每辆车的消息广播提供延迟保证的同时，将丢包率降至最低。VehCom的使能技术是一种异步数据包接收技术，它利用车辆的多根天线来解码来自相邻车辆的异步冲突数据包。我们已经在车辆无线测试平台上实现了异步数据包接收技术，并在大规模车辆网络中检验了VehCom的性能，其中：i）每辆车配备四根天线；ii）每辆车在其通信范围内有240辆车；iii）每辆车每100毫秒在10 MHz频谱上广播一个624位的数据包（保证延迟）。我们的实验和分析结果表明，在停车场丢包率低于3.9%，在本地道路上低于4.1%，在高速公路上低于6.2%。
Timely vehicle-to-vehicle (V2V) communication is a key component of intelligent transportation systems to improve driving safety and efficiency. Although many results have been produced for vehicular networks, most of them focused on improving vehicular communication capacity and reliability. Very limited progress has been made so far in the design of practical V2V communication schemes for large-scale vehicular networks. In this paper, we present VehCom, a fully distributed message broadcast scheme for V2V communication networks. VehCom offers a delay guarantee for each vehicle’s message broadcast while minimizing the packet loss rate. The enabler of VehCom is an asynchronous packet reception technique, which leverages a vehicle’s multiple antennas to decode asynchronous collided packets from its neighboring vehicles. We have implemented the asynchronous packet reception technique on a vehicular wireless testbed, and examined the performance of VehCom in a large-scale vehicular network where i) each vehicle is equipped with four antennas, ii) each vehicle has 240 vehicles in its communication range, and iii) each vehicle broadcasts a 624-bit packet over 10 MHz spectrum in every 100 ms (guaranteed delay). Our experimental and analytical results show that the packet loss rate is less than 3.9% on parking lots, less than 4.1% on local roads, and less than 6.2% on highways.