软件定义的VANET下流表用量感知的QoS路由机制

发布时间：2018-06-01 10:45

本文选题：软件定义网络 + 车辆自组织网络　；参考：《计算机研究与发展》2017年11期

【摘要】：VANET可以提供各类安全和非安全相关的服务,但现有的VANET难以保障应用服务的QoS需求.软件定义网络(software defined networking,SDN)以系统化的灵活控制网络的方式出现,其分离的数据与控制平面为网络带来了可编程性.因此首先设计了一种面向异构多网接入的软件定义的VANET架构;接着提出一种流表用量感知的动态QoS保障框架,允许使用模块化的方式管理网络,并支持业务流的动态加入和退出;最后建立了多业务流多约束条件下流表用量感知的QoS路由模型,该模型不仅考虑了丢包、时延和吞吐量等链路参数,还考虑了业务需求和流表使用情况,从而为VANET应用服务提供并发的QoS路由.实验表明:流表用量感知的动态QoS路由机制不仅能够满足多业务对各自丢包、时延和吞吐量的要求,还能够感知流表用量,从而避免流表溢出对QoS路由机制的影响,进一步提高了网络QoS保障的性能.
[Abstract]:VANET can provide a variety of security and non-security related services, but the existing VANET can not guarantee the QoS requirements of application services. Software defined networking (SDN) is presented as a systematic and flexible control network. The separated data and control plane bring programmability to the network. Therefore, this paper first designs a VANET architecture for heterogeneous multi-network access software definition, and then proposes a dynamic QoS security framework for flow-table usage awareness, which allows the management of networks in a modular manner. Finally, the QoS routing model of flow table usage sensing under multi-traffic and multi-constraint conditions is established, which not only takes into account the link parameters such as packet loss, delay and throughput, but also supports the dynamic join and exit of traffic flow. Business requirements and flow table usage are also considered to provide concurrent QoS routing for VANET application services. The experimental results show that the dynamic QoS routing mechanism can not only meet the requirements of packet loss, delay and throughput, but also can sense the consumption of flow table, thus avoiding the influence of flow table overflow on QoS routing mechanism. Further improve the network QoS guarantee performance.
【作者单位】：湖南大学信息科学与工程学院;湖南大学嵌入式与网络计算省重点实验室;
【基金】：国家自然科学基金项目(61502162) 中央高校基本科研业务费专项资金项目(531107040289)~~
【分类号】：TN915.0;U495

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