【摘要】：在移動通信系統(tǒng)的極速發(fā)展進(jìn)程中,未來無線通信網(wǎng)絡(luò)將越來越注重以人為本致力于提升用戶體驗。然而,現(xiàn)有的無線通信網(wǎng)絡(luò)并不能很好的保障用戶的多樣性需求,為此它將面臨巨大的挑戰(zhàn)。首先,未來的無線通信網(wǎng)絡(luò)很可能長期處于多網(wǎng)共存的情況,我們需要考慮新型的網(wǎng)絡(luò)管理和控制方式,來實現(xiàn)多種類型網(wǎng)絡(luò)的高效兼容。其次,未來的無線網(wǎng)絡(luò)應(yīng)該從面向服務(wù)出發(fā),滿足不同類型的業(yè)務(wù)的多樣化服務(wù)需求,提供按需服務(wù)的能力。基于軟件定義網(wǎng)絡(luò)(Software Defined Networking,SDN)與網(wǎng)絡(luò)功能虛擬化(Network Function Virtualization, NFV)的虛擬定制網(wǎng)絡(luò)技術(shù)將致力于實現(xiàn)無線接入網(wǎng)中多種類型網(wǎng)絡(luò)的高效兼容,并為用戶設(shè)備提供按需的網(wǎng)絡(luò)服務(wù)來滿足用戶設(shè)備多樣化需求。軟件定義拓?fù)?Software Define Topology,SDT)和軟件定義協(xié)議棧(Software Define Protocol, SDP)技術(shù)做為SDN技術(shù)的延伸和拓展將成為下一代移動通信網(wǎng)絡(luò)中最令人印象深刻的技術(shù)之一。基于SDT與SDP技術(shù)問題的解決好壞將會嚴(yán)重影響到網(wǎng)絡(luò)資源利用率、業(yè)務(wù)的服務(wù)質(zhì)量(Quality of Service,QoS)、用戶的體驗質(zhì)量(Quality of Experience,QoE)以及功能模塊的可編程性。本文我們主要分析與研究了無線接入網(wǎng)中虛擬定制網(wǎng)絡(luò)技術(shù)。首先研究了基于SDN技術(shù)的下一代移動通信網(wǎng)絡(luò)架構(gòu),通過該網(wǎng)絡(luò)架構(gòu)來對移動通信網(wǎng)絡(luò)進(jìn)行管理和控制。其次在該網(wǎng)絡(luò)架構(gòu)下基于SDT和SDP技術(shù)來針對無線接入網(wǎng)中的問題進(jìn)行了研究,以進(jìn)一步提升網(wǎng)絡(luò)性能與用戶體驗。主要針對無線接入網(wǎng)中以下的兩個問題進(jìn)行了研究:(1)基于SDT技術(shù)的無線接入網(wǎng)中虛擬服務(wù)網(wǎng)關(guān)部署機(jī)制:在無線接入網(wǎng)中,不考慮虛擬服務(wù)網(wǎng)關(guān)實例化位置的部署機(jī)制可能會造成流量聚合和流量工程的低效率以及網(wǎng)絡(luò)資源的高損耗,這樣往往會成為網(wǎng)絡(luò)整體性能的瓶頸。針對上述問題,我們提出針對虛擬服務(wù)網(wǎng)關(guān)部署機(jī)制的協(xié)同優(yōu)化方案。本文詳細(xì)描述了基于層次分析法與遺傳算法的協(xié)同優(yōu)化方案設(shè)計思想和具體技術(shù)細(xì)節(jié)。通過Matlab數(shù)值仿真表明協(xié)同優(yōu)化方案能夠有效的減少網(wǎng)絡(luò)資源的消耗、提升網(wǎng)絡(luò)吞吐量。(2)基于SDP技術(shù)的無線接入網(wǎng)中虛擬協(xié)議棧映射機(jī)制:SDP技術(shù)主要的是根據(jù)平臺的虛擬化和功能模塊化技術(shù)實現(xiàn)數(shù)據(jù)面?zhèn)鬏攨f(xié)議的可定制化和可編程性。在虛擬協(xié)議棧映射機(jī)制中,映射區(qū)域選擇和虛擬協(xié)議棧映射算法的設(shè)計將會對網(wǎng)絡(luò)性能帶來很嚴(yán)重的影響。本文,我們設(shè)計了一種合理的虛擬協(xié)議棧映射區(qū)域選擇機(jī)制,同時提出高效的基準(zhǔn)算法與蟻群算法來對虛擬協(xié)議棧映射算法進(jìn)行具體實現(xiàn)。我們在Matlab對虛擬協(xié)議棧映射機(jī)制進(jìn)行仿真實現(xiàn),結(jié)果標(biāo)明虛擬協(xié)議棧映射機(jī)制能夠有效滿足UE的多樣性需求、提升UE請求的成功映射率、減少網(wǎng)絡(luò)資源的消耗。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN915.0;TN929.5

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