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GAS: A group acknowledgment strategy for popular content distribution in Internet of vehicle

机译:GAS:汽车互联网中流行内容分发的群体认可策略

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摘要

As an important part of the Internet of Thing (IoT), the Internet of Vehicle (IoV) has attracted tremendous attentions due to its diverse applications and significant potentials in the Intelligent Transportation System (ITS). The IoV is designed to guarantee road safety, improve traffic efficiency and provide entertainment services through V2X (Vehicles-to-Everything) communications. However, due to high mobility and intermittent connectivity in IoV, the vehicles may fail to download a large popular file directly from other moving vehicles within limited time in Vehicle-to-Vehicle (V2V) phase. To improve the transmission efficiency, a Group Acknowledgment Strategy (GAS) is proposed in this paper. At first, A group transmission mode is designed and the popular content is divided into many segments according to various life time among vehicles, which could significantly speed up the data transfer process. Meanwhile, a GACK (Group Acknowledgment) mechanism is envisioned to unitedly reply the provider once data segments have been transmitted in one round, which will further reduces the network overhead and save more time for popular content distribution. The numerical results show that our proposed GAS has significant advantages over the non-cooperative approach and Aggregate Local Mobility (ALM) scheme in terms of average network delays, data loss ratio, transmission cost, network throughput and delivery ratio. (c) 2019 Elsevier Inc. All rights reserved.
机译:车联网(IoV)作为物联网(IoT)的重要组成部分,因其多样化的应用和在智能交通系统(ITS)中的巨大潜力而​​备受关注。 IoV旨在通过V2X(车辆到所有)通信来保证道路安全,提高交通效率并提供娱乐服务。但是,由于IoV中的高移动性和间歇性连接性,车辆可能无法在有限的时间内在“车辆到车辆(V2V)”阶段直接从其他行驶中的车辆下载大型的流行文件。为了提高传输效率,本文提出了一种组确认策略(GAS)。首先,设计了一种分组传输模式,根据车辆之间的不同生命周期将流行内容划分为多个部分,这可以显着加快数据传输过程。同时,设想了一种GACK(组确认)机制,一旦数据段已经在一个回合中传输,就可以统一答复提供者,这将进一步减少网络开销并节省更多时间进行流行的内容分发。数值结果表明,在平均网络延迟,数据丢失率,传输成本,网络吞吐量和传输率方面,我们提出的GAS与非合作方法和聚合本地移动(ALM)方案相比具有显着优势。 (c)2019 Elsevier Inc.保留所有权利。

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