信息中心网络中内容处理相关技术研究
发布时间：2018-08-02 08:36
【摘要】：互联网这一概念在上世纪六七十年代被首次提出,其最初的设计目的是用来实现主机之间的互联互通,进而实现资源的共享。然而在那个时代,造价高昂的硬件成本将互联网的使用者限制在少数的专业人士。随着科技的发展,硬件成本的大幅降低,家用PC逐渐普及,互联网也广泛渗透进人类生活的各个方面,如今互联网已经成为人类工作生活不可获取的一部分。近二十年来,随着影音共享、网络游戏和社交媒体等大量多媒体业务如雨后春笋般不断地涌现,人们对于互联网的需求也开始逐渐从基于端到端的网络互连转变为内容的高效获取。在访问内容的过程中,用户更关注的是如何能够更快地获取内容而不是从哪获得内容。这一基本需求的转变使得当前这种基于端到端传输模式的互联网架构的发展遇到了瓶颈。为了让互联网能够更好地适应当前用户的需求,学术界提出了两种演进路线,一种是以内容分发网络(Content Delivery Network,CDN)和点对点通信(Peer to Peer, P2P)技术为代表的“改良型”路线,通过“打补丁”的方式来优化当前网络架构,但是并没有从根本上解决这一问题。另一种是颠覆性的“革命型”路线,即采用“推倒重来”的方式设计网络架构以适应当前用户需求。在未来网络架构研究中,信息中心网络一经提出便迅速吸引了学术界的关注。在信息中心网络中,内容成为网络的核心。围绕内容这一核心,研究者对其中的命名、路由、缓存、安全等关键技术展开了大量研究。本文将对信息中心网络中内容处理相关技术展开研究,其中涉及了如何选择获取内容的最优路径、如何高效的从多个内容源获取内容、移动自组织网络环境下内容获取过程建模以及信息中心网络在5G网络中的应用,具体研究内容如下:1)基于蚁群算法的路由优化机制本研究中将一种基于内容活跃度的蚁群算法应用在内容中心网络的路由优化机制中。首先基于互联网内容热度的分析,提出了内容活跃度的概念。节点会产生两种蚂蚁,前向蚂蚁用于探测最优路径,其目标内容的选择就是依据内容活跃度来选取。当前向蚂蚁到达目标位置,该节点就会产生一个反向蚂蚁,它会沿着反向路径逐跳返回至发起探测的节点并更新沿途经过的节点信息表中链路时延、服务节点负载和接口内容活跃度等内容。节点周期性地重复这一过程,最终对其内部可达内容会得到一条最优的路径,并且保证了最优路径的实时性,同时基于内容活跃度的目标选择可以让内容流行度高的内容的路径优先被优化,可以更好地满足大多数的用户内容请求。2)基于喷泉编码的多源内容分发机制本研究实现一种高效的多源内容分发机制,当多个节点收到同一内容请求包时,节点会利用喷泉编码对原始内容进行编码产生一串编码符号,并封装在返回的数据包中,所有内容提供者会持续生成编码数据包并将其返回直到内容请求者接收到足够数量的数据包。最后内容请求者可以利用这些编码数据包恢复原始内容。在编码数据包传输过程中,通过有针对性的优化传输流程,可以保证网络可识别两种类型的数据包,体现良好的兼容性。3)以内容为中心的移动自组织网内容获取过程建模分析随着技术的发展,在无线领域中同样存在着对内容的访问量激增的问题,因此学术界开始讨论将信息中心网络概念应用于无线网络中。本研究针对二维空间中的移动自组织网内容获取过程进行了分析并建立了数学模型。基于RWP模型给出了二维空间中的节点分布模型,并基于MMRP推导出了内容获取过程的数学模型。最终通过仿真对比平均往返时延和稳态平均吞吐量两个参数证明了模型的准确性。4)信息中心网络应用于5G网络的研究4G网络的迅速发展和普及促使5G网络成为研究热点。信息中心网络技术结合移动通信网络的自身特点,应用于5G网络架构可以满足高效处理海量数据流量的需求。本文在第六章提出了 一种将信息中心网络技术与移动通信网络相结合的方案,用于实现移动网络中的高效内容分发。文中首先提出了一种基于内容中心网络的移动内容分发网络架构,然后基于此架构重新设计了内容管理的基本流程并提出了一种基于环境标签的内容注入策略,提高注入内容的利用率。随后通过在节点中增添用户授权信息表实现了一种用户管理机制,在机制中,只有被授权的用户才允许使用移动内容分发网络的服务。最后提出了一种集中式的路由更新方法,底层的内容变动是由上层控制器下发指令实现的,当控制器控制节点发生内容变化时,上层控制器内部的路由管理模块会执行路由更新操作,这样可以避免节点之间广播状态更新包给链路带来不必要的负担。
[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.
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TP393.0
本文编号：2158838
[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.
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TP393.0
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