车联网中多媒体合作共享的研究

发布时间：2018-05-27 18:30

本文选题：VANET + 合作共享　；参考：《大连理工大学》2014年硕士论文

【摘要】：车联网(VANET, Vehicular Ad Hoc Network)支持网络接入,视频流和内容分发,为车辆用户提供实时新闻／娱乐等多媒体资源,给人们日常生活带来很大的好处。由于VANET中车辆内部和路边基础设施(RSU, Road-Side Unit)上安装了无线通信设备,因此车辆可以通过车与车通信(V2V, Vehicular to Vehicular)以及车与路边基础设施通信(V2R, Vehicular to RSU)获取多媒体文件。但是在V2V通信中,通信链路不稳定性以及理性车辆可能出现的自私行为,导致多媒体资源查询和合作传输的失败。在V2R通信中,恶意车辆向RSU发送垃圾邮件,阻塞合法车辆和RSU通信,导致合法车辆接入失败并无法获得多媒体源文件；并且恶意车辆窃取伪造V2R通信内容,使得合法车辆无法获得完整的多媒体数据包。在VANET所涉及的众多技术中,多媒体数据共享是VANET中亟待解决的难点问题之一。因此,针对VANET中多媒体合作共享问题,本文主要研究以下两方面内容：首先,针对多媒体合作共享中V2V通信时由于断链和车辆自私引起的资源查询和传输失败问题,本文提出了一种基于P2P-BT的多媒体合作共享机制。由于VANET中车辆高速移动和拓扑变化无规律,使得传统的静态的P2P-BT方案在VANET中实施困难,因此本文结合VANET中车辆的特点和运动轨迹,建立VANET层次架构。在此基础上,本文提出了基于Tracker的多媒体文件查询机制和基于间接互惠博弈的树状回传机制,其中使用间接互惠博弈来激励车辆合作共享,提高资源成功查询率和V2V通信传递资源的效率。其次,针对多媒体合作共享中V2R通信时位于多RSU重叠覆盖内的车辆进行RSU安全接入和通信问题,本文提出了斯坦伯格博弈模型,将Visual Cryptography融入到博弈中。博弈模型既满足了RSU对利益的追求,又最大化了车辆用户的效用。Visual Cryptography方法有效地防止了VANET中的恶意车辆对RSU的攻击,对V2R通信内容的截取和伪造,降低了通信延迟,提高了RSU资源利用率和消息的完整度。使得车辆成功接入RSU,并能够顺利从RSU进行资源的下载,提高车辆用户的满意度。目前,P2P网络和VANET的研究是分布式计算和移动通信网络研究领域的两大热点,本文的研究为P2P和VANET的未来研究工作提供一些的建议和技术支持,具有重要的现实意义和研究价值。
[Abstract]:Van net, Vehicular Ad Hoc Network) supports network access, video stream and content distribution, provides real-time news / entertainment and other multimedia resources for vehicle users, and brings great benefits to people's daily life. Due to the installation of wireless communication equipment in the vehicle interior and on the roadside infrastructure (RSUU, Road-Side Unit) in VANET, vehicles can obtain multimedia files by means of vehicle-to-vehicle communication (V2V), Vehicular to Vehicular) and vehicle-roadside infrastructure communication (V2R, Vehicular to RSU). However, in V2V communication, the instability of communication link and the selfish behavior of rational vehicle may lead to the failure of multimedia resource query and cooperative transmission. In V2R communication, malicious vehicle sends spam to RSU, blocks legitimate vehicle and RSU communication, causes legal vehicle access failure and cannot obtain multimedia source file, and malicious vehicle steals and forges V2R communication content. Makes it impossible for a legitimate vehicle to obtain a complete multimedia packet. Among the many technologies involved in VANET, multimedia data sharing is one of the most difficult problems in VANET. Therefore, aiming at the problem of multimedia cooperation and sharing in VANET, this paper mainly studies the following two aspects: Firstly, aiming at the problem of resource query and transmission failure caused by broken chain and selfishness of vehicle in V2V communication in multimedia cooperative sharing, a multimedia cooperative sharing mechanism based on P2P-BT is proposed in this paper. Because of the irregular high speed movement and irregular topology change of vehicle in VANET, it is difficult to implement the traditional static P2P-BT scheme in VANET. Therefore, combining the characteristics and track of the vehicle in VANET, this paper establishes the VANET hierarchy architecture. On this basis, this paper proposes a multimedia file query mechanism based on Tracker and a tree return mechanism based on indirect reciprocal game, in which indirect reciprocal game is used to encourage vehicle cooperative sharing. The efficiency of V2V communication transfer resource is improved. Secondly, aiming at the problem of RSU secure access and communication for vehicles with multiple RSU overlapped coverage in V2R communication in multimedia cooperative sharing, a Steinberg game model is proposed in this paper, in which Visual Cryptography is incorporated into the game. The game model not only satisfies RSU's pursuit of benefits, but also maximizes the utility of vehicle users. Visual Cryptography method effectively prevents the malicious vehicles in VANET from attacking RSU, intercepts and forges the content of V2R communication, and reduces the communication delay. Improved RSU resource utilization and message integrity. It makes the vehicle access RSUs successfully, and can download resources from RSU smoothly, and improve the satisfaction of vehicle users. At present, the research of P2P network and VANET are two hot spots in the field of distributed computing and mobile communication network. The research in this paper provides some suggestions and technical support for the future research work of P2P and VANET, which has important practical significance and research value.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TP391.44;TN929.5

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