信息中心網(wǎng)絡(luò)的移動性支持機(jī)制研究
發(fā)布時間：2018-08-09 15:54
【摘要】：為從根本上解決傳統(tǒng)互聯(lián)網(wǎng)原始設(shè)計的市大弊端,國內(nèi)外學(xué)者相繼開展了未來互聯(lián)網(wǎng)理論和技術(shù)的研究工作,而具有資源利用率高、網(wǎng)絡(luò)能耗低、動態(tài)性能好等諸多優(yōu)勢的信息中心網(wǎng)絡(luò),現(xiàn)已發(fā)展成為未來互聯(lián)網(wǎng)研究領(lǐng)域中認(rèn)可度最高、潛力最大的網(wǎng)絡(luò)架構(gòu)之一。作為一個新興的網(wǎng)絡(luò)架構(gòu),信息中心網(wǎng)絡(luò)雖可通過節(jié)點(diǎn)對內(nèi)容的緩存,緩解內(nèi)容源或用戶移動造成的不良影響。但是,在信息中心網(wǎng)絡(luò)中,內(nèi)容源或用戶移動切換時,仍存在興趣消息或數(shù)據(jù)消息丟失,移動切換時延較長,路由可擴(kuò)展性降低,位置更新開銷較大,用戶移動切換體驗較差,無法提供區(qū)分內(nèi)容的移動性支持等一系列亟待解決的問題。為此,論文在信息中心網(wǎng)絡(luò)架構(gòu)下,提出了四種適用于不同移動切換支持需求場景的移動性支持機(jī)制,相關(guān)的創(chuàng)新工作具體如下：1.為有效解決信息中心網(wǎng)絡(luò)存在的內(nèi)容源移動性問題,論文提出了一種基于位置標(biāo)識的移動性支持機(jī)制。該機(jī)制可通過擴(kuò)展興趣消息和數(shù)據(jù)消息的消息格式,添加輔助興趣消息路由尋址的位置標(biāo)識及與內(nèi)容存儲器結(jié)構(gòu)類似的興趣存儲器,避免內(nèi)容源移動切換導(dǎo)致的興趣消息的丟失,縮短內(nèi)容源移動切換引入的移動切換時延,提高興趣消息的尋址效率并維護(hù)路由的可擴(kuò)展性。同時,論文在便攜終端移動模型的基礎(chǔ)上建立了一個內(nèi)容源移動模型,詳細(xì)地描述了內(nèi)容源的移動切換行為,并從理論分析和仿真測試兩方面比較了信息中心網(wǎng)絡(luò)中的各種內(nèi)容源移動性支持機(jī)制。結(jié)果表明：基于位置標(biāo)識的移動性支持機(jī)制具有較低的移動切換成本,較小的移動切換時延和較短的內(nèi)容獲取時延。2.為降低內(nèi)容源移動切換時的能量消耗并節(jié)省寶貴的無線鏈路資源,論文提出了一種基于代理的移動性支持機(jī)制。首先,該機(jī)制擴(kuò)展了接入路由器的基本功能,使其始終保持對內(nèi)容源移動狀態(tài)的監(jiān)測,并代替內(nèi)容源發(fā)起移動相關(guān)的信令交互流程。如此,內(nèi)容源無需過多地參與移動支持相關(guān)的操作,亦無需在相對匱乏的無線鏈路上傳輸與位置更新相關(guān)的消息。其次,該機(jī)制規(guī)范了內(nèi)容源位置表項的添加、更新與刪除原則,可保證內(nèi)容源位置表項正確地維護(hù)內(nèi)容源的位置信息,并避免過期內(nèi)容源位置表項浪費(fèi)有限的存儲空間。同時,論文采用流體流移動模型描述了內(nèi)容源的域內(nèi)移動切換行為和域間移動切換行為,設(shè)計了普適于各類移動性支持機(jī)制的三層網(wǎng)絡(luò)分析模型,并首次從理論分析和仿真測試兩方面比較了信息中心網(wǎng)絡(luò)與現(xiàn)有互聯(lián)網(wǎng)中的移動性支持機(jī)制。結(jié)果表明:基于代理的移動性支持機(jī)制具有較低的位置更新開銷,較小的移動切換時延和較少的丟包數(shù)目。此外,論文設(shè)計了一種以基于代理的移動性支持機(jī)制為基礎(chǔ)的子網(wǎng)移動支持方法,使得子網(wǎng)可以作為一個整體在信息中心網(wǎng)絡(luò)中自由地移動。3.為有效解決信息中心網(wǎng)絡(luò)存在的用戶移動性問題,論文提出了一種基于主動緩存的移動性支持機(jī)制。首先,該機(jī)制可通過接入路由器主動請求與緩存用戶移動切換過程中未能獲取的內(nèi)容,避免用戶移動切換導(dǎo)致的數(shù)據(jù)消息的丟失,縮短用戶移動切換引入的移動切換時延,并提高用戶的移動切換體驗。其次,該機(jī)制設(shè)計了一種基于鏈路層有效信息的用戶移動切換策略,可為用戶確定觸發(fā)移動切換支持相關(guān)進(jìn)程的適宜時間,并為用戶選擇即將移動切換至的最佳接入點(diǎn)。同時,論文采用隨機(jī)路點(diǎn)模型描述了用戶的移動切換行為,并首次從理論分析和仿真測試兩方面比較了信息中心網(wǎng)絡(luò)中的各種用戶移動性支持機(jī)制。結(jié)果表明：基于主動緩存的移動性支持機(jī)制具有較低的內(nèi)容獲取成本,較高的移動切換收益,較小的移動切換時延和較優(yōu)的內(nèi)容獲取效率。4.為滿足終端對不同類型內(nèi)容的不同移動切換體驗等級需求,論文提出了一種區(qū)分內(nèi)容的移動性支持機(jī)制。通過擴(kuò)展接入路由器的基本功能,修改興趣消息和數(shù)據(jù)消息的消息格式,并為不同類型的消息設(shè)置不同的轉(zhuǎn)發(fā)優(yōu)先級,該機(jī)制可在有效解決信息中心網(wǎng)絡(luò)存在的用戶移動性問題和內(nèi)容源移動性問題的同時,為不同身份的終端和不同類型的內(nèi)容提供不同等級的移動切換體驗。此外,論文給出了評估系統(tǒng)容量和服務(wù)阻塞概率的方法,并以實際數(shù)據(jù)為基礎(chǔ),分析了終端身份、終端行為和終端能力對上述機(jī)制系統(tǒng)容量的影響,以及會話到達(dá)速率和終端數(shù)目對上述機(jī)制服務(wù)阻塞概率的影響。最后,論文設(shè)計了一種以區(qū)分內(nèi)容的移動性支持機(jī)制為基礎(chǔ)的QoS支持方法,使得信息中心網(wǎng)絡(luò)可以為不同的內(nèi)容提供不同QOS等級的服務(wù)。
[Abstract]:In order to fundamentally solve the malpractice of the original design of the traditional Internet, scholars at home and abroad have carried out the research work of the future Internet theory and technology, and have many advantages such as high utilization rate of resources, low energy consumption and good dynamic performance, which have become the highest recognition in the field of Internet research in the future. One of the most potential network architectures. As a new network architecture, the information center network can alleviate the adverse effects of content source or user movement through the caching of the content. However, in the information center network, there is still interest message or data message loss and mobile switching when the content source or user moves handover. Long time delay, lower routing scalability, higher location updating overhead, poor user mobile handoff experience and unable to provide a series of problems to be solved to distinguish the mobility support of the content. Therefore, four kinds of mobility support mechanisms are proposed in the information center network architecture. The following innovations are as follows: 1. in order to effectively solve the problem of content source mobility in the information center network, a mobility support mechanism based on location identification is proposed in this paper. This mechanism can add the location identification and content of the auxiliary interesting message routing addressing by extending the message format of the interest message and the data message. The memory structure is similar to interest memory, which avoids the loss of interest messages caused by the mobile handoff of the content source, shortens the mobile handoff delay introduced by the mobile handoff of the content source, improves the addressing efficiency of the interest message and maintains the scalability of the routing. At the same time, a content source movement is established on the basis of the portable terminal mobile model. The model describes the mobile handover behavior of the content source in detail, and compares various source mobility support mechanisms in the information center network from two aspects of theoretical analysis and simulation test. The results show that the mobility support mechanism based on location identification has lower mobile switching cost, smaller mobile handoff delay and shorter time delay. In order to reduce the energy consumption and save the valuable wireless link resources, the content acquisition delay.2. proposed a mobility support mechanism based on proxy. Firstly, the mechanism extends the basic function of the access router to keep the monitoring of the mobile status of the content source and replace the content source. In this way, the content source does not need to participate in the mobile support related operations too much, and does not need to transmit the message related to the location update in the relatively scarce wireless chain. Secondly, the mechanism standardizes the addition of the content source table items, updates and deletes the principle that the content source location table is properly maintained. At the same time, the paper uses the fluid flow model to describe the mobile handover behavior and the mobile handover behavior in the domain of the content source, and designs a three layer network analysis model which is suitable for various mobility support mechanisms, and the theoretical analysis for the first time. Two aspects of the mobility support mechanism in the information center network and the existing Internet are compared. The results show that the agent based mobility support mechanism has lower location updating overhead, smaller mobile handoff delay and less number of packet loss. In addition, a mobility support mechanism based on agent is set up. Based on the subnet mobile support method, the subnet can freely move.3. as a whole in the information center network to effectively solve the user mobility problem in the information center network. In this paper, a mobility support mechanism based on active caching is proposed. First, the mechanism can be actively requested by the access router. To cache the content that the user can not obtain during the handoff, avoid the loss of the data message caused by the user's mobile handoff, shorten the mobile handoff delay introduced by the user mobile handoff, and improve the user's mobile handoff experience. Secondly, the mechanism designs a user mobile handoff strategy based on the link layer effective information, which can be used as the user. Determine the appropriate time to trigger the mobile handoff to support the related process and select the best access point for the user to switch to. At the same time, the random path point model is used to describe the user's mobile switching behavior, and the user mobility support in the information center network is compared for the first time from two aspects of the theoretical analysis and the simulation test. The results show that the mobility support mechanism based on active caching has a lower cost of content acquisition, higher mobile handoff benefit, smaller mobile handoff delay and better content acquisition efficiency.4. to meet different types of mobile switching experience level requirements for different types of content. Mobility support mechanism, by extending the basic function of the access router, modifying the message format of interest messages and data messages, and setting different forwarding priorities for different types of messages. This mechanism can effectively solve the user mobility and content source mobility problems in the information center network, as well as different identities. The terminal and different types of content provide different levels of mobile switching experience. In addition, the paper gives a method to evaluate the capacity of the system and the probability of service blocking. Based on the actual data, this paper analyzes the effect of terminal identity, terminal behavior and terminal capability on the system capacity of the system, and the rate of arrival and the number of terminals. In the end, a QoS support method based on the mobility support mechanism of the content differentiation is designed, which enables the information center network to provide different QOS levels of service for different content.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TP393.02
本文編號：2174588
[Abstract]:In order to fundamentally solve the malpractice of the original design of the traditional Internet, scholars at home and abroad have carried out the research work of the future Internet theory and technology, and have many advantages such as high utilization rate of resources, low energy consumption and good dynamic performance, which have become the highest recognition in the field of Internet research in the future. One of the most potential network architectures. As a new network architecture, the information center network can alleviate the adverse effects of content source or user movement through the caching of the content. However, in the information center network, there is still interest message or data message loss and mobile switching when the content source or user moves handover. Long time delay, lower routing scalability, higher location updating overhead, poor user mobile handoff experience and unable to provide a series of problems to be solved to distinguish the mobility support of the content. Therefore, four kinds of mobility support mechanisms are proposed in the information center network architecture. The following innovations are as follows: 1. in order to effectively solve the problem of content source mobility in the information center network, a mobility support mechanism based on location identification is proposed in this paper. This mechanism can add the location identification and content of the auxiliary interesting message routing addressing by extending the message format of the interest message and the data message. The memory structure is similar to interest memory, which avoids the loss of interest messages caused by the mobile handoff of the content source, shortens the mobile handoff delay introduced by the mobile handoff of the content source, improves the addressing efficiency of the interest message and maintains the scalability of the routing. At the same time, a content source movement is established on the basis of the portable terminal mobile model. The model describes the mobile handover behavior of the content source in detail, and compares various source mobility support mechanisms in the information center network from two aspects of theoretical analysis and simulation test. The results show that the mobility support mechanism based on location identification has lower mobile switching cost, smaller mobile handoff delay and shorter time delay. In order to reduce the energy consumption and save the valuable wireless link resources, the content acquisition delay.2. proposed a mobility support mechanism based on proxy. Firstly, the mechanism extends the basic function of the access router to keep the monitoring of the mobile status of the content source and replace the content source. In this way, the content source does not need to participate in the mobile support related operations too much, and does not need to transmit the message related to the location update in the relatively scarce wireless chain. Secondly, the mechanism standardizes the addition of the content source table items, updates and deletes the principle that the content source location table is properly maintained. At the same time, the paper uses the fluid flow model to describe the mobile handover behavior and the mobile handover behavior in the domain of the content source, and designs a three layer network analysis model which is suitable for various mobility support mechanisms, and the theoretical analysis for the first time. Two aspects of the mobility support mechanism in the information center network and the existing Internet are compared. The results show that the agent based mobility support mechanism has lower location updating overhead, smaller mobile handoff delay and less number of packet loss. In addition, a mobility support mechanism based on agent is set up. Based on the subnet mobile support method, the subnet can freely move.3. as a whole in the information center network to effectively solve the user mobility problem in the information center network. In this paper, a mobility support mechanism based on active caching is proposed. First, the mechanism can be actively requested by the access router. To cache the content that the user can not obtain during the handoff, avoid the loss of the data message caused by the user's mobile handoff, shorten the mobile handoff delay introduced by the user mobile handoff, and improve the user's mobile handoff experience. Secondly, the mechanism designs a user mobile handoff strategy based on the link layer effective information, which can be used as the user. Determine the appropriate time to trigger the mobile handoff to support the related process and select the best access point for the user to switch to. At the same time, the random path point model is used to describe the user's mobile switching behavior, and the user mobility support in the information center network is compared for the first time from two aspects of the theoretical analysis and the simulation test. The results show that the mobility support mechanism based on active caching has a lower cost of content acquisition, higher mobile handoff benefit, smaller mobile handoff delay and better content acquisition efficiency.4. to meet different types of mobile switching experience level requirements for different types of content. Mobility support mechanism, by extending the basic function of the access router, modifying the message format of interest messages and data messages, and setting different forwarding priorities for different types of messages. This mechanism can effectively solve the user mobility and content source mobility problems in the information center network, as well as different identities. The terminal and different types of content provide different levels of mobile switching experience. In addition, the paper gives a method to evaluate the capacity of the system and the probability of service blocking. Based on the actual data, this paper analyzes the effect of terminal identity, terminal behavior and terminal capability on the system capacity of the system, and the rate of arrival and the number of terminals. In the end, a QoS support method based on the mobility support mechanism of the content differentiation is designed, which enables the information center network to provide different QOS levels of service for different content.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TP393.02
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