發(fā)布時(shí)間：2018-03-10 07:55

  本文選題：流量感知　切入點(diǎn)：帶寬共享　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著互聯(lián)網(wǎng)應(yīng)用技術(shù)的迅猛發(fā)展,人們對(duì)于網(wǎng)絡(luò)的依賴度越來越高,而應(yīng)用服務(wù)的提升,也使得人們對(duì)網(wǎng)絡(luò)媒體的品質(zhì)也有了更高的要求。上述需求使得人們對(duì)于網(wǎng)絡(luò)帶寬的要求越來越高,帶寬的增加速度已經(jīng)很難滿足用戶的帶寬需求。因此,如何有效地利用帶寬資源已經(jīng)成為急需解決的問題。傳統(tǒng)的流量感知和帶寬控制技術(shù)開銷較高,且難于部署。軟件定義網(wǎng)絡(luò)(SDN)的出現(xiàn)給該問題的解決帶來了新的契機(jī)。論文工作研究基于SDN的流量感知與帶寬控制系統(tǒng),以便達(dá)到高效利用網(wǎng)絡(luò)帶寬的目的。論文首先分析了基于SDN的流量感知技術(shù)和帶寬控制技術(shù)的研究現(xiàn)狀;然后,提出了系統(tǒng)的總體框架并對(duì)其中的關(guān)鍵問題進(jìn)行說明;接下來,對(duì)其中的基于多級(jí)流表的流量感知模塊和帶寬控制模塊進(jìn)行了詳細(xì)的論述;最后,通過大量的實(shí)驗(yàn),對(duì)系統(tǒng)的各項(xiàng)性能指標(biāo)和功能指標(biāo)進(jìn)行了測(cè)試。論文工作的重點(diǎn)主要包括以下幾個(gè)方面:(1)提出基于OpenFlow協(xié)議多級(jí)流表的流量感知算法。所提出的算法利用了OpenFlow交換機(jī)會(huì)對(duì)匹配到流表項(xiàng)規(guī)則的數(shù)據(jù)包進(jìn)行計(jì)數(shù)的特征,采用多級(jí)流表技術(shù),提出了一種主被動(dòng)相結(jié)合的流量感知方式,利用較小的開銷來實(shí)現(xiàn)網(wǎng)絡(luò)流量的感知,并以此獲得網(wǎng)絡(luò)帶寬的利用率。(2)設(shè)計(jì)并實(shí)現(xiàn)基于OpenFlow的多用戶之間的帶寬共享技術(shù)。對(duì)于網(wǎng)絡(luò)中流量控制,本文采取了對(duì)所有主機(jī)設(shè)置一個(gè)虛擬的IP作為網(wǎng)關(guān),控制器通過選擇剩余帶寬最大WAN的MAC來作為網(wǎng)關(guān)ARP回復(fù)的MAC,讓主機(jī)將數(shù)據(jù)包從這個(gè)MAC地址轉(zhuǎn)發(fā)到Internet。這樣就完成了動(dòng)態(tài)選路的過程,從而實(shí)現(xiàn)用戶之間的帶寬共享。論文工作通過大量的實(shí)驗(yàn)對(duì)所實(shí)現(xiàn)的系統(tǒng)進(jìn)行了詳盡的測(cè)試,測(cè)試結(jié)果表明流量感知子系統(tǒng)可使用較小開銷來實(shí)現(xiàn)流量感知的平均準(zhǔn)確度可達(dá)96%,能夠有效保證測(cè)量數(shù)據(jù)信息的準(zhǔn)確性。測(cè)試結(jié)果還驗(yàn)證帶寬控制子系統(tǒng)可以實(shí)現(xiàn)用戶之間的帶寬共享,并且能夠在WAN端口實(shí)現(xiàn)負(fù)載均衡�？傊�,本系統(tǒng)實(shí)現(xiàn)了所有的測(cè)試指標(biāo),在功能和性能上都能滿足使用的需求。
[Abstract]:With the rapid development of Internet application technology, people depend more and more on the network, and the application services are improved. It also makes people have higher requirements for the quality of network media. These requirements make the demand for network bandwidth more and more high, and the speed of bandwidth increase has become very difficult to meet the bandwidth requirements of users. How to make effective use of bandwidth resources has become an urgent problem. It is difficult to deploy. The emergence of SDN brings a new opportunity to solve this problem. This paper studies the flow perception and bandwidth control system based on SDN. In order to make efficient use of network bandwidth, this paper firstly analyzes the research status of traffic sensing technology and bandwidth control technology based on SDN; then, proposes the overall framework of the system and explains the key issues. The flow sensing module and bandwidth control module based on multilevel flow table are discussed in detail. Finally, through a large number of experiments, The performance index and function index of the system are tested. The main work of this paper includes the following aspects: 1) the algorithm of traffic perception based on OpenFlow protocol multilevel flow table is proposed. The algorithm uses OpenFlow exchange. The feature of the opportunity to count packets that match the rules of the flow table entry, By using multilevel flow table technology, an active and passive traffic sensing method is proposed to realize network traffic perception with small overhead. The bandwidth utilization ratio of the network is obtained. (2) the bandwidth sharing technology between multi-users based on OpenFlow is designed and implemented. For the traffic control in the network, a virtual IP is set up as the gateway to all hosts in this paper. The controller selects the MAC with the largest residual bandwidth WAN as the MAC of the gateway ARP reply, and allows the host to forward the packet from the MAC address to the Internet. This completes the dynamic routing process. In order to realize the bandwidth sharing among users, the thesis has carried on the detailed test to the realized system through a large number of experiments. The test results show that the traffic sensing subsystem can use small overhead to realize the average accuracy of traffic perception up to 96, which can effectively ensure the accuracy of the measurement data information. The test results also verify that the bandwidth control subsystem can be real. Bandwidth sharing between current users, And it can realize load balance in WAN port. In a word, the system realizes all the test indexes, and can meet the requirements in function and performance.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TP393.06

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