基于信息中心网络构架的MANET关键问题研究
发布时间：2018-11-17 09:47
【摘要】：目前,信息中心网络(ICN,Information Centric Network)正在成为研究的热点,该架构将信息/内容作为构建网络的基础,即信息的需求者直接通过信息的名字来获取需求的信息。内容中心网络(CCN,Content Centric Network)是ICN的一种典型实现,在CCN中,网络中拥有信息的节点首先向网络中广播信息,然后请求节点据此向网络中发出请求兴趣包,该兴趣包如果被拥有信息的节点所收到,那么该节点返回请求者所需要的数据,至此完成一次通信过程。所以CCN不需要像传统IP网络建立固定的通信链路。在移动自组网络(MANET,Mobile Ad-Hoc Network)下,由于节点的不规则移动和信道干扰等原因,传统IP网络通信时所建立的链路极易被破坏,而将CCN引入到MANET中就能够大大提高网络的稳定性和鲁棒性。现有CCN的通信机制是针对有线网络场景而设计的。如果直接将CCN的通信机制应用到MANET场景,将会导致通信效率的下降。因为在MANET环境下,如果节点决定转发兴趣包,节点会向其通信范围内的所有节点广播兴趣包,这样就产生了大量冗余的兴趣包。而且拥有信息的节点有可能收到多个来自不同节点的同一兴趣包,从而返回大量多余的数据包,而数据包远远大于其余的包,所以会大大加重网络负担。据此本文提出了一种基于CCN的路由机制,减少网络带宽消耗。该机制首先对CCN工作的第一阶段发送内容广播包进行优化,将原始的广播包拆分为两种包分开发送,以此减小其带宽消耗。其次对CCN中发送请求兴趣包过程进行优化,使得该兴趣包在转发过程中每次只发送至其周围节点里距离信息拥有节点最近的一个节点,最后通过仿真验证了以上策略的有效性。另一方面,由于车载网络在复杂道路状况下的通信性能难以得到保证,延迟和丢包率都较高。本文在车载网络中引入CCN并对其进行改进,提出了一种通信方案来减少车载网络中的带宽消耗,该方案利用车载网络中的路边系统(RSU,Road Side Unit)充当CCN的请求兴趣包传播者,帮助请求车辆寻找到拥有内容的车辆,由于在各个数据包中添加了地理位置信息,所以内容拥有车辆能够知道请求车辆的位置,由于车辆都拥有GPS导航系统且沿着道路行驶,所以内容拥有车辆可利用最短路算法计算出请求车辆和自己的最短路,并将该最短路存放到返回的数据包中,这样数据包就能够按照该最短路逐跳传回至请求车辆。
[Abstract]:At present, the information center network (ICN,Information Centric Network) is becoming a hot research topic. The architecture regards information / content as the foundation of constructing network, that is, the information demanders obtain the information of the requirement directly through the name of the information. Content-centric network (CCN,Content Centric Network) is a typical implementation of ICN. In CCN, nodes with information in the network first broadcast information to the network, and then the requesting node sends out the request interest packet to the network. If the packet is received by the node that owns the information, the node returns the data needed by the requester, thus completing a communication process. Therefore, CCN does not need to establish fixed communication links like traditional IP networks. In mobile ad hoc networks (MANET,Mobile Ad-Hoc Network), due to the irregular movement of nodes and channel interference, the links established in traditional IP networks are easily destroyed. Introducing CCN into MANET can greatly improve the stability and robustness of the network. The existing communication mechanism of CCN is designed for wired network scenarios. If the communication mechanism of CCN is directly applied to the MANET scenario, the communication efficiency will be reduced. Because in the MANET environment, if the node decides to forward the interest packet, the node will broadcast the interest packet to all the nodes in its communication scope, which will result in a large number of redundant interest packets. Moreover, the nodes with information may receive multiple same interest packets from different nodes and return a large number of redundant packets, which are far larger than the other packets, so the network burden will be greatly increased. Based on this, a routing mechanism based on CCN is proposed to reduce network bandwidth consumption. The mechanism optimizes the first stage of the CCN to send content broadcast packets and divides the original broadcast packets into two packets to be sent separately to reduce the bandwidth consumption. Secondly, the process of sending request interest packets in CCN is optimized, so that the interest packets are sent to only one node in each forwarding process, which is nearest to the node with information. Finally, the effectiveness of the above strategy is verified by simulation. On the other hand, the communication performance of vehicular network is difficult to be guaranteed under complex road conditions, so the delay and packet loss rate are both high. In this paper, CCN is introduced and improved in vehicle network, and a communication scheme is proposed to reduce bandwidth consumption in vehicle network. In this scheme, the roadside system (RSU,Road Side Unit) in vehicle network is used to act as the communicator of CCN request interest packet. Help the requesting vehicle find the vehicle that has the content, because the content owner vehicle can know the location of the requesting vehicle by adding geographical location information to each packet, because the vehicle has GPS navigation system and travels along the road. Therefore, the content-owned vehicle can calculate the shortest path of the requesting vehicle and its own by using the shortest path algorithm, and store the shortest path in the returned data packet, so that the packet can be sent back to the requesting vehicle step by step according to the shortest path.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP393.02
[Abstract]:At present, the information center network (ICN,Information Centric Network) is becoming a hot research topic. The architecture regards information / content as the foundation of constructing network, that is, the information demanders obtain the information of the requirement directly through the name of the information. Content-centric network (CCN,Content Centric Network) is a typical implementation of ICN. In CCN, nodes with information in the network first broadcast information to the network, and then the requesting node sends out the request interest packet to the network. If the packet is received by the node that owns the information, the node returns the data needed by the requester, thus completing a communication process. Therefore, CCN does not need to establish fixed communication links like traditional IP networks. In mobile ad hoc networks (MANET,Mobile Ad-Hoc Network), due to the irregular movement of nodes and channel interference, the links established in traditional IP networks are easily destroyed. Introducing CCN into MANET can greatly improve the stability and robustness of the network. The existing communication mechanism of CCN is designed for wired network scenarios. If the communication mechanism of CCN is directly applied to the MANET scenario, the communication efficiency will be reduced. Because in the MANET environment, if the node decides to forward the interest packet, the node will broadcast the interest packet to all the nodes in its communication scope, which will result in a large number of redundant interest packets. Moreover, the nodes with information may receive multiple same interest packets from different nodes and return a large number of redundant packets, which are far larger than the other packets, so the network burden will be greatly increased. Based on this, a routing mechanism based on CCN is proposed to reduce network bandwidth consumption. The mechanism optimizes the first stage of the CCN to send content broadcast packets and divides the original broadcast packets into two packets to be sent separately to reduce the bandwidth consumption. Secondly, the process of sending request interest packets in CCN is optimized, so that the interest packets are sent to only one node in each forwarding process, which is nearest to the node with information. Finally, the effectiveness of the above strategy is verified by simulation. On the other hand, the communication performance of vehicular network is difficult to be guaranteed under complex road conditions, so the delay and packet loss rate are both high. In this paper, CCN is introduced and improved in vehicle network, and a communication scheme is proposed to reduce bandwidth consumption in vehicle network. In this scheme, the roadside system (RSU,Road Side Unit) in vehicle network is used to act as the communicator of CCN request interest packet. Help the requesting vehicle find the vehicle that has the content, because the content owner vehicle can know the location of the requesting vehicle by adding geographical location information to each packet, because the vehicle has GPS navigation system and travels along the road. Therefore, the content-owned vehicle can calculate the shortest path of the requesting vehicle and its own by using the shortest path algorithm, and store the shortest path in the returned data packet, so that the packet can be sent back to the requesting vehicle step by step according to the shortest path.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP393.02
【相似文献】
相关期刊论文 前10条
1 宦娟;鞠时光;;移动自组网入侵检测综述[J];计算机工程与设计;2007年13期
2 周进怡;;移动自组网中可用性分析研究[J];湖南科技大学学报(自然科学版);2007年03期
3 程铃;;移动自组网的单播地址自动分配方案[J];通信技术;2009年05期
4 刘玮玮;;移动自组网流量仿真及特征分析[J];价值工程;2010年11期
5 谭龙文;王国才;;一种基于权值的移动自组网门限证书更新方案[J];微计算机信息;2011年02期
6 陈超;;移动自组网技术在消防部队抢险救援通信保障中的应用[J];消防技术与产品信息;2012年10期
7 芦鸿雁;;移动自组网安全技术综述[J];黑龙江科技信息;2013年05期
8 陈曦,张霞,梁兴强;移动自组网测试平台设计研究[J];计算机工程与应用;2004年12期
9 王建新,拉米;移动自组网安全的性研究[J];电信快报;2004年05期
10 郑源,陈建二,王建新;移动自组网中泛播技术研究综述[J];计算技术与自动化;2004年02期
相关会议论文 前10条
1 杨乐;;移动自组网中广播算法综述[A];第三届全国软件测试会议与移动计算、栅格、智能化高级论坛论文集[C];2009年
2 石川;高婧怡;朱培栋;张杨;;基于移动自组网的分布式设备故障感知和实时宣告系统的研究与实现[A];2010年第16届全国信息存储技术大会（IST2010）论文集[C];2010年
3 王敏;经继松;杨s，
本文编号：2337347
本文链接：https://www.wllwen.com/guanlilunwen/ydhl/2337347.html
