无线接入网中虚拟定制网络技术

发布时间：2019-02-24 20:25

【摘要】：在移动通信系统的极速发展进程中,未来无线通信网络将越来越注重以人为本致力于提升用户体验。然而,现有的无线通信网络并不能很好的保障用户的多样性需求,为此它将面临巨大的挑战。首先,未来的无线通信网络很可能长期处于多网共存的情况,我们需要考虑新型的网络管理和控制方式,来实现多种类型网络的高效兼容。其次,未来的无线网络应该从面向服务出发,满足不同类型的业务的多样化服务需求,提供按需服务的能力。基于软件定义网络(Software Defined Networking,SDN)与网络功能虚拟化(Network Function Virtualization, NFV)的虚拟定制网络技术将致力于实现无线接入网中多种类型网络的高效兼容,并为用户设备提供按需的网络服务来满足用户设备多样化需求。软件定义拓扑(Software Define Topology,SDT)和软件定义协议栈(Software Define Protocol, SDP)技术做为SDN技术的延伸和拓展将成为下一代移动通信网络中最令人印象深刻的技术之一。基于SDT与SDP技术问题的解决好坏将会严重影响到网络资源利用率、业务的服务质量(Quality of Service,QoS)、用户的体验质量(Quality of Experience,QoE)以及功能模块的可编程性。本文我们主要分析与研究了无线接入网中虚拟定制网络技术。首先研究了基于SDN技术的下一代移动通信网络架构,通过该网络架构来对移动通信网络进行管理和控制。其次在该网络架构下基于SDT和SDP技术来针对无线接入网中的问题进行了研究,以进一步提升网络性能与用户体验。主要针对无线接入网中以下的两个问题进行了研究:(1)基于SDT技术的无线接入网中虚拟服务网关部署机制:在无线接入网中,不考虑虚拟服务网关实例化位置的部署机制可能会造成流量聚合和流量工程的低效率以及网络资源的高损耗,这样往往会成为网络整体性能的瓶颈。针对上述问题,我们提出针对虚拟服务网关部署机制的协同优化方案。本文详细描述了基于层次分析法与遗传算法的协同优化方案设计思想和具体技术细节。通过Matlab数值仿真表明协同优化方案能够有效的减少网络资源的消耗、提升网络吞吐量。(2)基于SDP技术的无线接入网中虚拟协议栈映射机制:SDP技术主要的是根据平台的虚拟化和功能模块化技术实现数据面传输协议的可定制化和可编程性。在虚拟协议栈映射机制中,映射区域选择和虚拟协议栈映射算法的设计将会对网络性能带来很严重的影响。本文,我们设计了一种合理的虚拟协议栈映射区域选择机制,同时提出高效的基准算法与蚁群算法来对虚拟协议栈映射算法进行具体实现。我们在Matlab对虚拟协议栈映射机制进行仿真实现,结果标明虚拟协议栈映射机制能够有效满足UE的多样性需求、提升UE请求的成功映射率、减少网络资源的消耗。
[Abstract]:With the rapid development of mobile communication system, the future wireless communication network will pay more and more attention to the people-oriented to improve the user experience. However, the existing wireless communication network can not guarantee the diversity of users, so it will face great challenges. First of all, the future wireless communication networks are likely to coexist in multi-networks for a long time. We need to consider new network management and control methods to achieve the high efficiency and compatibility of various types of networks. Secondly, the future wireless network should be service-oriented, meet the diverse service needs of different types of services, and provide on-demand services. The virtual customized network technology based on software defined network (Software Defined Networking,SDN) and network function virtualization (Network Function Virtualization, NFV) will be devoted to realize the high efficiency compatibility of many types of network in wireless access network. And provide on-demand network services for user equipment to meet the diversified needs of user equipment. Software definition topology (Software Define Topology,SDT) and software definition protocol stack (Software Define Protocol, SDP) as the extension and extension of SDN technology will become one of the most impressive technologies in the next generation mobile communication network. The solution of technical problems based on SDT and SDP will seriously affect the utilization of network resources, service quality of service (Quality of Service,QoS), user experience quality (Quality of Experience,QoE) and the programmability of function modules. In this paper, we mainly analyze and research the virtual custom network technology in wireless access network. Firstly, the next generation mobile communication network architecture based on SDN technology is studied, which is used to manage and control the mobile communication network. Secondly, based on SDT and SDP technology, the problems in wireless access network are studied in order to further improve the network performance and user experience. This paper mainly focuses on the following two problems in wireless access network: (1) the deployment mechanism of virtual service gateway in wireless access network based on SDT technology: in wireless access network, The deployment mechanism that does not consider the instantiation location of the virtual service gateway may lead to the low efficiency of traffic aggregation and traffic engineering and the high loss of network resources, which will often become the bottleneck of the overall network performance. Aiming at the above problems, we propose a cooperative optimization scheme for the deployment mechanism of virtual service gateway. This paper describes in detail the design idea and technical details of cooperative optimization scheme based on AHP and genetic algorithm. The Matlab numerical simulation shows that the cooperative optimization scheme can effectively reduce the consumption of network resources. (2) Virtual protocol stack mapping mechanism based on SDP technology in wireless access network: SDP technology is mainly based on platform virtualization and functional modularization technology to realize the data surface protocol customization and programmability. In the mechanism of virtual protocol stack mapping, the selection of mapping region and the design of virtual protocol stack mapping algorithm will seriously affect the network performance. In this paper, we design a reasonable virtual protocol stack mapping region selection mechanism, and propose an efficient benchmark algorithm and ant colony algorithm to implement the virtual protocol stack mapping algorithm. We emulate the virtual protocol stack mapping mechanism in Matlab. The results show that the virtual protocol stack mapping mechanism can effectively meet the diverse needs of UE, improve the successful mapping rate of UE requests, and reduce the consumption of network resources.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN915.0;TN929.5

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