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Broadcast Performance Analysis and Improvements of the LTE-V2V Autonomous Mode at Road Intersection

机译：道路交叉口LTE-V2V自主模式的广播性能分析及改进

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摘要

An autonomous V2V communication mode (also known as side-link mode 4), which facilitates V2V communication in out of eNB coverage areas, has recently been introduced into the Long term evolution (LTE) standard. Recent research has studied the performance of this LTE-V2V autonomous mode for a highway use case. However, performance analysis for a highway use case cannot be easily applied to an intersection use case as it may contain non-line-of-sight (NLOS) communication links. In this paper, we analyze and evaluate the safety message broadcasting performance of LTE-V2V autonomous mode in an urban intersection scenario. Considering practical path loss models, we present the impact of NLOS communication link on the overall message dissemination performance. Through the analytical and simulation results, we show that the overall message dissemination performance degrades drastically with increasing vehicle density and increasing distance of the transmitting vehicle from the intersection. To improve the performance, we propose a vehicle-assisted relaying scheme in which the relaying vehicle is selected in an autonomous manner. We also present two resource allocation strategies for the relaying vehicle. For low to medium vehicle density along the street, we observe significant improvement in message dissemination through relaying compared to the scheme without relaying.
机译：最近，将长期演进（LTE）标准引入了自主V2V通信模式（也称为侧链路模式4），该模式有助于在eNB覆盖范围之外的V2V通信。最近的研究已经研究了这种LTE-V2V自主模式在高速公路用例中的性能。但是，高速公路用例的性能分析不能轻松地应用于交叉口用例，因为它可能包含非视线（NLOS）通信链接。在本文中，我们分析和评估了城市交叉路口场景中LTE-V2V自主模式的安全消息广播性能。考虑到实际的路径损耗模型，我们介绍了NLOS通信链路对整体消息分发性能的影响。通过分析和仿真结果，我们发现，随着车辆密度的增加和传输车辆到十字路口的距离的增加，整体消息的传播性能急剧下降。为了提高性能，我们提出了一种车辆辅助中继方案，其中以自主方式选择中继车辆。我们还提出了两种用于中继车辆的资源分配策略。对于沿街道的中低车辆密度，与没有中继的方案相比，我们观察到通过中继的消息传播有了显着改善。

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