【摘要】：互聯(lián)網(wǎng)這一概念在上世紀(jì)六七十年代被首次提出,其最初的設(shè)計目的是用來實現(xiàn)主機之間的互聯(lián)互通,進(jìn)而實現(xiàn)資源的共享。然而在那個時代,造價高昂的硬件成本將互聯(lián)網(wǎng)的使用者限制在少數(shù)的專業(yè)人士。隨著科技的發(fā)展,硬件成本的大幅降低,家用PC逐漸普及,互聯(lián)網(wǎng)也廣泛滲透進(jìn)人類生活的各個方面,如今互聯(lián)網(wǎng)已經(jīng)成為人類工作生活不可獲取的一部分。近二十年來,隨著影音共享、網(wǎng)絡(luò)游戲和社交媒體等大量多媒體業(yè)務(wù)如雨后春筍般不斷地涌現(xiàn),人們對于互聯(lián)網(wǎng)的需求也開始逐漸從基于端到端的網(wǎng)絡(luò)互連轉(zhuǎn)變?yōu)閮?nèi)容的高效獲取。在訪問內(nèi)容的過程中,用戶更關(guān)注的是如何能夠更快地獲取內(nèi)容而不是從哪獲得內(nèi)容。這一基本需求的轉(zhuǎn)變使得當(dāng)前這種基于端到端傳輸模式的互聯(lián)網(wǎng)架構(gòu)的發(fā)展遇到了瓶頸。為了讓互聯(lián)網(wǎng)能夠更好地適應(yīng)當(dāng)前用戶的需求,學(xué)術(shù)界提出了兩種演進(jìn)路線,一種是以內(nèi)容分發(fā)網(wǎng)絡(luò)(Content Delivery Network,CDN)和點對點通信(Peer to Peer, P2P)技術(shù)為代表的“改良型”路線,通過“打補丁”的方式來優(yōu)化當(dāng)前網(wǎng)絡(luò)架構(gòu),但是并沒有從根本上解決這一問題。另一種是顛覆性的“革命型”路線,即采用“推倒重來”的方式設(shè)計網(wǎng)絡(luò)架構(gòu)以適應(yīng)當(dāng)前用戶需求。在未來網(wǎng)絡(luò)架構(gòu)研究中,信息中心網(wǎng)絡(luò)一經(jīng)提出便迅速吸引了學(xué)術(shù)界的關(guān)注。在信息中心網(wǎng)絡(luò)中,內(nèi)容成為網(wǎng)絡(luò)的核心。圍繞內(nèi)容這一核心,研究者對其中的命名、路由、緩存、安全等關(guān)鍵技術(shù)展開了大量研究。本文將對信息中心網(wǎng)絡(luò)中內(nèi)容處理相關(guān)技術(shù)展開研究,其中涉及了如何選擇獲取內(nèi)容的最優(yōu)路徑、如何高效的從多個內(nèi)容源獲取內(nèi)容、移動自組織網(wǎng)絡(luò)環(huán)境下內(nèi)容獲取過程建模以及信息中心網(wǎng)絡(luò)在5G網(wǎng)絡(luò)中的應(yīng)用,具體研究內(nèi)容如下:1)基于蟻群算法的路由優(yōu)化機制本研究中將一種基于內(nèi)容活躍度的蟻群算法應(yīng)用在內(nèi)容中心網(wǎng)絡(luò)的路由優(yōu)化機制中。首先基于互聯(lián)網(wǎng)內(nèi)容熱度的分析,提出了內(nèi)容活躍度的概念。節(jié)點會產(chǎn)生兩種螞蟻,前向螞蟻用于探測最優(yōu)路徑,其目標(biāo)內(nèi)容的選擇就是依據(jù)內(nèi)容活躍度來選取。當(dāng)前向螞蟻到達(dá)目標(biāo)位置,該節(jié)點就會產(chǎn)生一個反向螞蟻,它會沿著反向路徑逐跳返回至發(fā)起探測的節(jié)點并更新沿途經(jīng)過的節(jié)點信息表中鏈路時延、服務(wù)節(jié)點負(fù)載和接口內(nèi)容活躍度等內(nèi)容。節(jié)點周期性地重復(fù)這一過程,最終對其內(nèi)部可達(dá)內(nèi)容會得到一條最優(yōu)的路徑,并且保證了最優(yōu)路徑的實時性,同時基于內(nèi)容活躍度的目標(biāo)選擇可以讓內(nèi)容流行度高的內(nèi)容的路徑優(yōu)先被優(yōu)化,可以更好地滿足大多數(shù)的用戶內(nèi)容請求。2)基于噴泉編碼的多源內(nèi)容分發(fā)機制本研究實現(xiàn)一種高效的多源內(nèi)容分發(fā)機制,當(dāng)多個節(jié)點收到同一內(nèi)容請求包時,節(jié)點會利用噴泉編碼對原始內(nèi)容進(jìn)行編碼產(chǎn)生一串編碼符號,并封裝在返回的數(shù)據(jù)包中,所有內(nèi)容提供者會持續(xù)生成編碼數(shù)據(jù)包并將其返回直到內(nèi)容請求者接收到足夠數(shù)量的數(shù)據(jù)包。最后內(nèi)容請求者可以利用這些編碼數(shù)據(jù)包恢復(fù)原始內(nèi)容。在編碼數(shù)據(jù)包傳輸過程中,通過有針對性的優(yōu)化傳輸流程,可以保證網(wǎng)絡(luò)可識別兩種類型的數(shù)據(jù)包,體現(xiàn)良好的兼容性。3)以內(nèi)容為中心的移動自組織網(wǎng)內(nèi)容獲取過程建模分析隨著技術(shù)的發(fā)展,在無線領(lǐng)域中同樣存在著對內(nèi)容的訪問量激增的問題,因此學(xué)術(shù)界開始討論將信息中心網(wǎng)絡(luò)概念應(yīng)用于無線網(wǎng)絡(luò)中。本研究針對二維空間中的移動自組織網(wǎng)內(nèi)容獲取過程進(jìn)行了分析并建立了數(shù)學(xué)模型�；赗WP模型給出了二維空間中的節(jié)點分布模型,并基于MMRP推導(dǎo)出了內(nèi)容獲取過程的數(shù)學(xué)模型。最終通過仿真對比平均往返時延和穩(wěn)態(tài)平均吞吐量兩個參數(shù)證明了模型的準(zhǔn)確性。4)信息中心網(wǎng)絡(luò)應(yīng)用于5G網(wǎng)絡(luò)的研究4G網(wǎng)絡(luò)的迅速發(fā)展和普及促使5G網(wǎng)絡(luò)成為研究熱點。信息中心網(wǎng)絡(luò)技術(shù)結(jié)合移動通信網(wǎng)絡(luò)的自身特點,應(yīng)用于5G網(wǎng)絡(luò)架構(gòu)可以滿足高效處理海量數(shù)據(jù)流量的需求。本文在第六章提出了 一種將信息中心網(wǎng)絡(luò)技術(shù)與移動通信網(wǎng)絡(luò)相結(jié)合的方案,用于實現(xiàn)移動網(wǎng)絡(luò)中的高效內(nèi)容分發(fā)。文中首先提出了一種基于內(nèi)容中心網(wǎng)絡(luò)的移動內(nèi)容分發(fā)網(wǎng)絡(luò)架構(gòu),然后基于此架構(gòu)重新設(shè)計了內(nèi)容管理的基本流程并提出了一種基于環(huán)境標(biāo)簽的內(nèi)容注入策略,提高注入內(nèi)容的利用率。隨后通過在節(jié)點中增添用戶授權(quán)信息表實現(xiàn)了一種用戶管理機制,在機制中,只有被授權(quán)的用戶才允許使用移動內(nèi)容分發(fā)網(wǎng)絡(luò)的服務(wù)。最后提出了一種集中式的路由更新方法,底層的內(nèi)容變動是由上層控制器下發(fā)指令實現(xiàn)的,當(dāng)控制器控制節(jié)點發(fā)生內(nèi)容變化時,上層控制器內(nèi)部的路由管理模塊會執(zhí)行路由更新操作,這樣可以避免節(jié)點之間廣播狀態(tài)更新包給鏈路帶來不必要的負(fù)擔(dān)。
[Abstract]:The concept of the Internet was first proposed in the 60s and 70s last century. Its original design was designed to achieve interoperability between hosts and to share resources. However, in that era, high cost hardware costs limited the users of the Internet to a small number of professionals. With the development of technology and the cost of hardware. The Internet has become an integral part of human life, and the Internet has become an integral part of human life. In the past twenty years, with the sharing of audio and video, network games and social media, a large number of multimedia services have sprung up like mushrooms, and people have come to each other in the past twenty years. The demand for networking has also begun to shift from end-to-end network interconnection to efficient access to content. In the process of accessing content, users are more concerned with how to get content faster than where to get content. This basic demand change makes the current Internet architecture based on end to end transmission patterns. In order to enable the Internet to better adapt to the needs of current users, the academic community has proposed two evolution routes, one is the "improved" route represented by the Content Delivery Network (CDN) and the point to point communication (P2P) technology (Peer to Peer) technology, which is optimized by "patching". The former network architecture has not fundamentally solved this problem. The other is a subversive "revolutionary" route, which is designed to adapt to current user needs by using the "overcoming" way to adapt to current user needs. In the future network architecture research, the information center network has quickly attracted the attention of the academic community. In the central network, content becomes the core of the network. Around the core, the researchers have carried out a great deal of research on the key technologies such as naming, routing, caching, and security. This paper will study the related technology of content processing in the information center network, including how to choose the optimal path to obtain the content, and how to efficiently from Multiple content sources obtain content, modeling of content acquisition process in mobile ad hoc network environment and application of information center network in 5G network. The specific research contents are as follows: 1) an ant colony algorithm based on content activity based on content activity based routing optimer is applied to the routing optimization based on ant colony algorithm Firstly, based on the analysis of the content heat of the Internet, the concept of content activity is proposed. The node will produce two ants, and the forward ants are used to detect the optimal path. The selection of the target content is based on the content activity. It returns the path by hop to the node that initiates the detection and updates the link delay, the load of the service node and the activity of the interface content in the node information table passed along the path. The node repeats this process periodically, and finally gets an optimal path for its internal content, and ensures the real-time of the optimal path, at the same time The target selection of content activity can make the path priority of content with high content popularity optimized, and can better satisfy most user content requests.2) based on the multi source content distribution mechanism based on fountain coding, a efficient multi-source content distribution mechanism is implemented, when multiple nodes receive the same content request packet, The point will encode the original content using the fountain code to produce a string of coded symbols and encapsulate it in the returned packet. All content providers will continue to generate coded packets and return it until the content requester receives a sufficient number of packets. Finally, the content requester can use these coded packets to restore the original package. Content. In the transmission process of coded packets, the network can identify two types of data packets, and reflect good compatibility.3. The content centric mobile ad hoc network content acquisition process modeling analysis with the development of technology, there is also a visit to the content in the wireless field. The problem of increasing questions has been asked, so the academic circles began to discuss the application of the information center network concept to the wireless network. This study was aimed at the analysis of the content acquisition process of the mobile ad hoc network in two-dimensional space and a mathematical model. Based on the RWP model, the node distribution model in the two-dimensional space was given, and the internal model was derived based on the MMRP. The mathematical model of the capacity acquisition process. Finally, by comparing the two parameters of the average round-trip delay and the steady average throughput, the accuracy of the model is proved by two parameters. The information center network is applied to the 5G network. The rapid development and popularization of the 4G network has made the 5G network become the research hotspot. The information center network technology is combined with the mobile communication network. In the sixth chapter, a scheme of combining information center network technology with mobile communication network is proposed in the sixth chapter, which is used to implement efficient content distribution in mobile networks. In this paper, a mobile network based mobile content center network is proposed. The content distribution network architecture, then redesigns the basic process of content management based on this architecture, and proposes a content injection strategy based on the environment label to improve the utilization of content. Then, a user management mechanism is implemented by adding user authorization information table to the node. In the mechanism, only the authorized user is in the mechanism. The service of mobile content distribution network is allowed. Finally, a centralized routing update method is proposed. The underlying content changes are implemented by the instruction of the upper controller. When the controller control node changes the content, the routing management module within the upper controller can execute the routing update operation, which can be avoided. The broadcast state update packets between nodes bring unnecessary burden to the link.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TP393.0

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