关键词: 视频传输, 命名数据网络, 网络内缓存, 多路径传输, 动态自适应流

Abstract: The Internet has developed into a network dominated by content delivery services such as delivering live and on-demand videos. There are some problems in traditional IP network in terms of supporting video delivery, such as the complexity and high overhead of the deployment of multicast, the disability to effectively utilize multipath transmission, the poor support for mobility and so on. Named data networking (NDN), a promising future Internet architecture, intrinsically supports in-network caching and multipath transmission. Consumers actively use interest message to request data packet from producer, and this consumer-driven communication model enables NDN to naturally support the mobility of consumers. These features offer the potential for NDN to efficiently deliver videos. This paper first introduces the background of video delivery and NDN, and then elaborates some schemes that take the advantages of NDN to deliver video: firstly, how do the strategies in NDN improve video bit rate; secondly, how do the strategies in NDN improve video playback stability; thirdly, how do the strategies in NDN protect video copyright and privacy; finally, how do the strategies in NDN transfer new types of video. According to the analysis of these existing schemes and the comparison of their performance over IP and NDN, the challenges of delivering videos over NDN are finally pointed out.

Key words: video delivery, named data networking (NDN), in-network caching, multipath trans-mission, dynamic adaptive streaming (DAS)