發(fā)布時(shí)間：2018-05-07 03:18

  本文選題：軟件定義網(wǎng)絡(luò) + 控制器��； 參考：《深圳大學(xué)》2017年碩士論文

【摘要】：隨著現(xiàn)代技術(shù)的不斷推陳出新,網(wǎng)絡(luò)用戶規(guī)模的不斷擴(kuò)大和海量數(shù)據(jù)的增長,傳統(tǒng)的網(wǎng)絡(luò)架構(gòu)已經(jīng)不能滿足人們?nèi)找嬖鲩L的用網(wǎng)需求。因?yàn)閭鹘y(tǒng)網(wǎng)絡(luò)的結(jié)構(gòu)是封閉的,僵硬的,并且出于廠家自身盈利的目的,其中作為網(wǎng)絡(luò)核心的路由器只對開發(fā)人員開放少量的編程接口,開發(fā)人員難以在現(xiàn)有的架構(gòu)上改進(jìn)和開發(fā)新的網(wǎng)絡(luò)架構(gòu)�，F(xiàn)有的網(wǎng)絡(luò)雖然也進(jìn)行了諸多改進(jìn),比如采用虛擬化技術(shù)、云計(jì)算技術(shù)、數(shù)據(jù)中心合并等等,但是新技術(shù)的復(fù)雜性給傳統(tǒng)網(wǎng)絡(luò)架構(gòu)帶來了更多的壓力。在這種情況下,軟件定義網(wǎng)絡(luò)(Software Defined Network,SDN)作為一種2008年才正式提出的新型的網(wǎng)絡(luò)架構(gòu),可以很好的解決這個(gè)問題。SDN架構(gòu)的本質(zhì)是將轉(zhuǎn)發(fā)和控制平面分離,管理人員可以通過編寫應(yīng)用程序來直接控制硬件設(shè)備的轉(zhuǎn)發(fā)行為,并且這種控制行為不依賴于特定的硬件設(shè)備。這樣做可以大大減少運(yùn)營成本,簡化網(wǎng)絡(luò)結(jié)構(gòu),并且擁有巨大的靈活性和可編程性。本文首先對SDN架構(gòu)和協(xié)議基礎(chǔ)進(jìn)行了探討,分析了SDN的優(yōu)勢和其應(yīng)用場景,針對其中的兩個(gè)應(yīng)用場景,校園網(wǎng)和車載網(wǎng)的應(yīng)用分別提出一個(gè)無線SDN的實(shí)現(xiàn)方案。1)在校園網(wǎng)的WLAN接入認(rèn)證中,本文提出的方案結(jié)合了SDN的架構(gòu),根據(jù)MAC地址來驗(yàn)證用戶是否在白名單內(nèi),如果是白名單用戶就可以直接訪問外網(wǎng)。該方案只需要在SDN控制器應(yīng)用上修改下發(fā)流表策略和編寫認(rèn)證服務(wù)器程序就可以實(shí)現(xiàn)。該方案中用戶二次接入時(shí)不需要重復(fù)驗(yàn)證賬號密碼,并且管理人員可以靈活地修改策略和控制用戶的接入。2)針對車載網(wǎng),本文探討并改進(jìn)了一個(gè)基于CloudMAC方案的車載網(wǎng)絡(luò)原型系統(tǒng)。將CloudMac框架和AP虛擬化技術(shù)結(jié)合,再應(yīng)用隧道技術(shù)、HostAP技術(shù),在實(shí)驗(yàn)室利用電腦和路由器搭建該系統(tǒng),使接入該系統(tǒng)的車載終端在不同的無線覆蓋點(diǎn)范圍內(nèi)移動(dòng)時(shí),保持?jǐn)?shù)據(jù)連接暢通。
[Abstract]:With the development of modern technology, the continuous expansion of network users and the growth of massive data, the traditional network architecture can no longer meet the increasing needs of people. Because the traditional network structure is closed, rigid, and for the sake of the manufacturer's own profit, the router, which is the core of the network, only opens a few programming interfaces to the developer. It is difficult for developers to improve and develop new network architectures on existing architectures. Although the existing network has also made many improvements, such as using virtualization technology, cloud computing technology, data center merging and so on, but the complexity of the new technology brings more pressure to the traditional network architecture. In this case, Software Defined Network (SDN), as a new network architecture that was formally proposed in 2008, can solve this problem very well. The essence of SDN architecture is to separate forwarding from control plane. Managers can directly control the forwarding behavior of hardware devices by writing applications, and this control behavior does not depend on specific hardware devices. This greatly reduces operating costs, simplifies network structure, and has great flexibility and programmability. This paper first discusses the architecture and protocol of SDN, analyzes the advantages of SDN and its application scenarios, aiming at the two application scenarios. The application of campus network and vehicle network proposes a wireless SDN implementation scheme. 1) in the campus network WLAN access authentication, the proposed scheme combines the SDN architecture to verify whether the user is in the whitelist according to the MAC address. If it is a whitelist user can access the outside network directly. This scheme can be implemented only by modifying the downflow table strategy and writing the authentication server program in the SDN controller application. In this scheme, users do not need to repeatedly verify the password of the account when they access the account again, and the manager can flexibly modify the policy and control the user's access. 2) for the onboard network, This paper discusses and improves a vehicle network prototype system based on CloudMAC scheme. Combining CloudMac framework with AP virtualization technology, and then applying tunneling technology to host AP technology, using computers and routers in the laboratory to build the system, the vehicle terminal connected to the system can move within different wireless coverage points. Keep the data connection open.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN915.02;TN925.93;TN929.5

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本文編號：1855173