本文選題：PMIPv6 + 快速切換��； 參考：《山東大學(xué)》2014年碩士論文

【摘要】：代理移動(dòng)IPv6(PMIPv6)是因特網(wǎng)工程任務(wù)組(IETF)基于網(wǎng)絡(luò)的移動(dòng)性管理(NETLMM)工作組于2008年提出并標(biāo)準(zhǔn)化的一種基于網(wǎng)絡(luò)的本地移動(dòng)性管理協(xié)議。在PMIPv6協(xié)議中,不需要移動(dòng)節(jié)點(diǎn)IP協(xié)議棧的改變以及任何網(wǎng)絡(luò)層移動(dòng)性管理相關(guān)的信令過(guò)程的參與,節(jié)約了無(wú)線資源并降低了移動(dòng)節(jié)點(diǎn)在無(wú)線鏈路上的隧道傳輸開(kāi)銷(xiāo)和信令開(kāi)銷(xiāo)。然而,由于PMIPv6協(xié)議采用的是“先斷后接”的反應(yīng)式切換模式,在PMIPv6協(xié)議切換過(guò)程中的接入認(rèn)證,注冊(cè)更新和隧道建立等操作,帶來(lái)了較大的切換時(shí)延和數(shù)據(jù)包的丟失,這對(duì)于實(shí)時(shí)性要求較高的即時(shí)通信和多媒體應(yīng)用來(lái)說(shuō)是不能接受的。 IETF工作組于2011年提出的快速代理移動(dòng)IPv6(FPMIPv6)協(xié)議方案雖然可以一定程度上減少PMIPv6協(xié)議切換過(guò)程帶來(lái)的切換時(shí)延和丟包,但是當(dāng)移動(dòng)節(jié)點(diǎn)運(yùn)動(dòng)較快,網(wǎng)絡(luò)沒(méi)有足夠的時(shí)間進(jìn)行預(yù)測(cè)式的切換準(zhǔn)備時(shí),FPMIPv6協(xié)議的預(yù)測(cè)式切換機(jī)制失敗,采用反應(yīng)式切換機(jī)制。而反應(yīng)式的代理切換發(fā)起和應(yīng)答消息交互及隧道建立操作,引起較長(zhǎng)的通信過(guò)程數(shù)據(jù)的中斷和數(shù)據(jù)包丟失,會(huì)導(dǎo)致切換性能的大幅下降。 本文提出一種自適應(yīng)鏈路觸發(fā)的快速有效的PMIPv6切換方案。針對(duì)FPMIPv6切換協(xié)議中,當(dāng)預(yù)測(cè)式快速切換機(jī)制失敗時(shí),需采用反應(yīng)式切換機(jī)制而帶來(lái)較大的通信中斷和丟包,以及包傳輸開(kāi)銷(xiāo)較大的問(wèn)題,本文采用自適應(yīng)鏈路觸發(fā)機(jī)制,即鏈路即將斷裂觸發(fā)信號(hào)的產(chǎn)生不再依賴(lài)于特定的接收信號(hào)門(mén)限,而是根據(jù)移動(dòng)節(jié)點(diǎn)的速度和切換準(zhǔn)備操作所需要的時(shí)間來(lái)動(dòng)態(tài)產(chǎn)生,自適應(yīng)啟動(dòng)切換準(zhǔn)備操作,確保網(wǎng)絡(luò)有足夠的時(shí)間來(lái)完成切換準(zhǔn)備操作及預(yù)測(cè)式切換模式的成功進(jìn)行。同時(shí),將PMIPv6切換過(guò)程中的接入認(rèn)證和注冊(cè)更新過(guò)程在當(dāng)前鏈路斷裂之前提前完成,使得移動(dòng)節(jié)點(diǎn)在連接到新的接入網(wǎng)絡(luò)后能夠盡快配置端口并繼續(xù)進(jìn)行之前的通信會(huì)話(huà)過(guò)程,大大減少了切換所帶來(lái)的通信中斷時(shí)間,并且在完成注冊(cè)后直接建立本地移動(dòng)錨點(diǎn)(LMA)與新移動(dòng)接入網(wǎng)關(guān)之間的雙向隧道,新移動(dòng)接入網(wǎng)關(guān)的緩沖器緩存來(lái)自LMA的下行數(shù)據(jù)包,從而避免數(shù)據(jù)包在切換過(guò)程中的丟失。同時(shí),這種有效的緩沖機(jī)制也避免了在FPMIPv6切換協(xié)議中,先前移動(dòng)接入網(wǎng)關(guān)(p-MAG)和新移動(dòng)接入網(wǎng)關(guān)(n-MAG)之間的雙向隧道之間的隧道的傳輸開(kāi)銷(xiāo)。 本文首先通過(guò)數(shù)值分析的方式,引入預(yù)測(cè)式快速失敗概率模型,分別對(duì)提出的自適應(yīng)鏈路觸發(fā)的快速有效的切換方案,基本的PMIPv6及FPMIPv6三種切換方案,在三層切換時(shí)延和包傳輸開(kāi)銷(xiāo)方面的性能進(jìn)行了對(duì)比分析,進(jìn)行數(shù)值分析的結(jié)果表明,本文提出的改進(jìn)切換機(jī)制的三層切換時(shí)延和包傳輸開(kāi)銷(xiāo)在三種切換方案中都是最小的,性能最優(yōu)。應(yīng)用NS-2仿真工具對(duì)三種切換方案的性能進(jìn)行了仿真模擬,仿真結(jié)果很好地驗(yàn)證了數(shù)值分析結(jié)果。
[Abstract]:Agent Mobile IPv6 (IPMIPv6) is a Web-based local mobility management protocol proposed and standardized by the Internet Engineering Task Force (IETF) Network Mobility Management (NETLMMM) working Group in 2008. In PMIPv6 protocol, there is no need for the change of IP stack of mobile nodes and the participation of any signaling process related to mobility management in network layer, which saves wireless resources and reduces the overhead of tunnel transmission and signaling of mobile nodes on wireless links. However, because the PMIPv6 protocol adopts the reactive switching mode of "first disconnect and then connect", the operation of access authentication, registration update and tunnel establishment in the process of PMIPv6 protocol handoff has brought about a large handoff delay and packet loss. This is unacceptable for real-time instant messaging and multimedia applications. The Fast Agent Mobile IPv6 (FPMIPv6) protocol proposed by the IETF working Group in 2011 can reduce the handoff delay and packet loss caused by the handover process of the PMIPv6 protocol to a certain extent, but when the mobile nodes move faster, The network does not have enough time for predictive handoff preparation when the predictive handoff mechanism of FPMIPv6 protocol fails and the reactive handoff mechanism is adopted. However, reactive agent handoff initiation and response message interaction and tunneling operations can lead to the interruption of long communication process data and the loss of data packets, which will lead to a significant decline in handoff performance. This paper presents a fast and efficient PMIPv6 handoff scheme for adaptive link triggering. In FPMIPv6 handoff protocol, when the predictive fast handoff mechanism fails, the reactive handoff mechanism should be used to bring more communication interruption and packet loss, and the packet transmission overhead is high. In this paper, adaptive link trigger mechanism is adopted. That is, the generation of the link imminent break trigger signal is no longer dependent on the specific threshold of the received signal, but is dynamically generated according to the speed of the mobile node and the time required for the handover preparation operation, and adaptively starts the handover preparation operation. Ensure that the network has sufficient time to complete the handover preparation operation and the successful implementation of the predictive handover mode. At the same time, the access authentication and registration update process in the PMIPv6 handover process is completed in advance before the current link breaks, so that the mobile node can configure the port and continue the previous communication session process as soon as possible after connecting to the new access network. The communication interruption time caused by handover is greatly reduced, and the two-way tunnel between the local mobile anchor LMA and the new mobile access gateway is directly established after registration is completed. The buffer of the new mobile access gateway cache the downlink packets from the LMA. In order to avoid the packet in the switching process of the loss. At the same time, this efficient buffer mechanism also avoids the transmission overhead between the bidirectional tunnel between the previous mobile access gateway (p-MAG) and the new mobile access gateway (n-MAG) in the FPMIPv6 handoff protocol. In this paper, a predictive fast failure probability model is introduced through numerical analysis. The proposed fast and effective handoff scheme based on adaptive link trigger, the basic PMIPv6 and FPMIPv6 handoff schemes are proposed respectively. The performance of layer 3 handoff delay and packet transmission overhead are compared and analyzed. The numerical results show that the proposed layer 3 handoff delay and packet transmission overhead are the least among the three handoff schemes. Optimal performance. The performance of the three switching schemes is simulated by using the NS-2 simulation tool, and the numerical analysis results are well verified by the simulation results.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.04

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 周華春;張宏科;秦雅娟;;基于網(wǎng)絡(luò)的區(qū)域移動(dòng)性管理協(xié)議性能分析[J];北京交通大學(xué)學(xué)報(bào);2007年05期

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本文編號(hào)：1980074