【摘要】：軟件定義網(wǎng)絡(luò)(Software-Defined Networking)是一種新型的網(wǎng)絡(luò)架構(gòu),通過控制面和數(shù)據(jù)面分離、集中式的管理和可編程的接口實(shí)現(xiàn)對(duì)網(wǎng)絡(luò)的靈活控制。將SDN和無線網(wǎng)絡(luò)結(jié)合受到越來越多的關(guān)注,本文針對(duì)基于SDN的無線網(wǎng)絡(luò)控制機(jī)制展開研究。在對(duì)已有研究成果對(duì)比和分析的基礎(chǔ)上,提出了基于智能SDN的無線局域網(wǎng)管理方案,通過對(duì)OpenFlow協(xié)議的擴(kuò)展實(shí)現(xiàn)SDN控制器對(duì)無線AP和交換機(jī)的統(tǒng)一管理,解決大規(guī)模無線局域網(wǎng)組網(wǎng)面臨的集中式接入管理、移動(dòng)性管理和干擾管理等問題,同時(shí)將智能中心引入SDN,解決了控制器功能不足以及控制器之間協(xié)同的問題。針對(duì)切換問題,提出了三層無縫切換機(jī)制,通過Mininet仿真驗(yàn)證方案在減少切換時(shí)延上的有效性。針對(duì)干擾問題提出了基于干擾圖和流量預(yù)測(cè)的信道分配算法,仿真結(jié)果表明算法能夠有效減少系統(tǒng)中無線AP之間的干擾,提升系統(tǒng)的性能。針對(duì)蜂窩網(wǎng)絡(luò)向異構(gòu)、融合、多租戶承載等方向演進(jìn)的需求,提出了一種基于智能SDN的異構(gòu)蜂窩網(wǎng)絡(luò)管理架構(gòu),將蜂窩網(wǎng)中的無線接入網(wǎng)和核心網(wǎng)進(jìn)行統(tǒng)一管理和協(xié)同,基于智能決策中心,實(shí)現(xiàn)無線接入網(wǎng)資源的動(dòng)態(tài)適配。針對(duì)多租戶業(yè)務(wù)流轉(zhuǎn)發(fā)帶來的路徑分配問題,提出了基于增強(qiáng)學(xué)習(xí)的網(wǎng)絡(luò)切片算法和路徑分配算法,在保證租戶間隔離的同時(shí)提供對(duì)業(yè)務(wù)的QoS保障,通過仿真驗(yàn)證了算法的有效性。
[Abstract]:Software defined Network (Software-Defined Networking) is a new network architecture, which can control the network flexibly through the separation of control surface and data surface, centralized management and programmable interface. More and more attention is paid to the combination of SDN and wireless network. In this paper, the control mechanism of wireless network based on SDN is studied. Based on the comparison and analysis of the existing research results, a WLAN management scheme based on intelligent SDN is put forward. Through the extension of OpenFlow protocol, the unified management of wireless AP and switch by SDN controller is realized. In order to solve the problems of centralized access management, mobility management and interference management in large-scale WLAN network, the intelligent center is introduced into SDN, to solve the problems of insufficient function of controller and coordination between controllers. Aiming at the handoff problem, a three-layer seamless handoff mechanism is proposed, and the effectiveness of the scheme in reducing handoff delay is verified by Mininet simulation. A channel assignment algorithm based on interference graph and traffic prediction is proposed. The simulation results show that the algorithm can effectively reduce the interference between wireless AP in the system and improve the performance of the system. Aiming at the evolution of cellular network towards heterogeneity, convergence and multi-tenant bearing, a heterogeneous cellular network management architecture based on intelligent SDN is proposed, which manages and collaborates the wireless access network and core network in cellular network. Based on intelligent decision center, the dynamic adaptation of wireless access network resources is realized. In order to solve the path assignment problem caused by multi-tenant traffic forwarding, a network slicing algorithm and a path assignment algorithm based on reinforcement learning are proposed, which can guarantee the separation between tenants and provide the QoS guarantee for the service at the same time. The effectiveness of the algorithm is verified by simulation.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN92

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相關(guān)期刊論文 前1條

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本文編號(hào)：2384686