Research On Content Distribution In Vehicular Ad Hoc Network Based On Information Centric Networking

Vehicular Ad hoc Networks (VANET) has received a lot of attention in recent years and extensively studied both at home and abroad. On the one hand, we can make use of VANET to improve traffic safety, and avoid traffic jam or traffic accident.On the other hand, with the rapid growth of Internet, users'demands gradually turn to access the content and enjoy the Internet entertainment, provided by the communication through V2V and V2R. the topology changes quickly and the characteristics of wireless channel is very unstable in VANET based on IP network, the performance of content distribution in VANET is so poor that affecting user experience when downloading a popular content. Therefore, content distribution mechanism research in VANET becomes active. The future network architecture of Information Centric Networking which is put forward recent years, it makes up for the difficulty in mobility management in VANET to some extent, because: 1)ICN support in-network caching, and enhance the ability of data distribution in VANET; 2) naturally integrate delay tolerant network (DTN) and VANET; 3) ICN support the mobility of data sources and data requesters.Named Data Networking (NDN) is a typical project in the field research of ICN, and this paper mainly aims at the existing problems of VANET above, the main research works based on NDN are as follows:First of all, on the basis of NDN communication architecture, this paper modified and designed the format of Interest packets and Data packets, and implemented the communication processes between V2V, so as to carry out the information and data interaction between vehicles.Secondly, every node is rational and selfish in the content distribution between V2V, and they want to gain the most utility in content distribution. This paper puts forward an efficient content request distribution mechanism based on incentive coalition game, it solves the selfish behavior of nodes in content distribution, and more and more nodes are willing to actively request the missing content segments. And in order to reduce the cost of the request process, this paper proposes a collaborative content request distribution mechanism, and through the design of the coalition formation algorithm, it not only can reduce redundant requests, improve content distribution efficiency in VANET, but also reduce the request cost, indirectly increase the expected revenue.