A Novel Low-Latency V2V Resource Allocation Scheme Based on Cellular V2X Communications
A Novel Low-Latency V2V Resource Allocation Scheme Based on Cellular V2X Communications
复制标题
一种基于蜂窝V2X通信的新型低延迟V2V资源分配方案
DOI：
10.1109/tits.2018.2865173
复制
发表时间：
2019-06-01
影响因子：
8.5
通讯作者：
Khan, Zahid
中科院分区：
文献类型：
--
作者：
Abbas, Fakhar;Fan, Pingzhi;Khan, Zahid
在车载自组织网络（VANESCO）中，蜂窝车联网（C-V2X）是一种用于车辆到基础设施、车辆到行人和车辆到网络之间通信的新兴技术，可提高交通效率、道路安全和信息娱乐服务的可用性。本文提出了一种基于C-V2X技术的V2 V使能资源分配方案，以改善VAN网络的可靠性和延迟。其关键思想是，车辆之间基于蜂窝V2X技术的V2 V通信消除了争用延迟，并可以帮助进行更长距离的通信。特别地，我们提出了一种混合架构，其中V2 V链路由蜂窝eNodeB在覆盖方案中控制。在该方案中，每个车辆周期性地检查其分组寿命，并请求蜂窝eNodeB确定V2 V链路。蜂窝eNodeB处的最优资源分配问题是选择最优接收器车辆以确定V2 V链路并分配合适的信道以最小化总延迟。该问题等价于带相关权的最大加权独立集问题（MWIS-AW），是NP-难问题。为了计算权重，开发了一种分析方法来模拟预期的延迟和分组交付率。此外，提出了一种基于贪婪蜂窝的V2 V链路选择算法来解决MWIS-AW问题，并提出了一个理论性能下限。仿真结果表明，所提出的方案显着优于现有的方案在延迟，吞吐量和分组投递率。
In vehicular ad hoc networks (VANETs), cellular vehicle-to-everything (C-V2X) is an emerging technology for communications between vehicle-to-infrastructure, vehicle-to-pedestrian, and vehicle-to-network which improves traffic efficiency, road safety, and the availability of infotainment services. Herein, a novel V2V-enabled resource allocation scheme based on C-V2X technology is proposed to improve the reliability and latency of VANETs. The key idea is that V2V communications based on cellular-V2X technology among vehicles remove the contention latency and can assist for longer distance communications. Particularly, we propose a hybrid architecture, where the V2V links are controlled by the cellular eNodeB in the overlay scheme. In this scheme, every vehicle periodically checks its packet lifetime and requests the cellular eNodeB to determine V2V links. The optimum resource allocation problem at the cellular eNodeB is to choose optimum receiver vehicles to determine V2V links and allocate suitable channels to minimize the total latency. This problem is equivalent to the maximum weighted independent set problem (MWIS-AW) with associated weights, which is NP-hard. In order to compute the weights, an analytical approach is developed to model the expected latency and packet delivery ratio. Moreover, a greedy cellular-based V2V link selection algorithm is proposed to solve MWIS-AW problem and develop a theoretical performance lower bound. Simulation results show that the proposed scheme significantly outperforms the existing schemes in terms of latency, throughput, and packet delivery ratio.