The emergence of self-driving technologies implies that a future vehicle will likely become an entertainment center that demands personalized multimedia contents with very high quality. The surge of vehicular content ...The emergence of self-driving technologies implies that a future vehicle will likely become an entertainment center that demands personalized multimedia contents with very high quality. The surge of vehicular content demand brings significant challenges for the fifth generation(5G) cellular communication network. To cope with the challenge of massive content delivery, previous studies suggested that the 5G mobile edge network should be designed to integrate communication, computing, and cache(3C) resources to enable advanced functionalities such as proactive content delivery and in-network caching. However, the fundamental benefits achievable by computing and caching in mobile communications networks are not yet properly understood. This paper proposes a novel theoretical framework to characterize the tradeoff among computing, cache, and communication resources required by the mobile edge network to fulfill the task of content delivery. Analytical and numerical results are obtained to characterize the 3C resource tradeoff curve. These results reveal key insights into the fundamental benefits of computing and caching in vehicular mobile content delivery networks.展开更多
随着互联网技术的发展和普及,广播电视流媒体传输已经成为人们获取信息和娱乐的重要方式之一。然而由于网络环境的复杂性和不稳定性,如何保证流媒体传输的质量成一个重要的问题。内容分发网络(Content Distribution Network,CDN)作为一...随着互联网技术的发展和普及,广播电视流媒体传输已经成为人们获取信息和娱乐的重要方式之一。然而由于网络环境的复杂性和不稳定性,如何保证流媒体传输的质量成一个重要的问题。内容分发网络(Content Distribution Network,CDN)作为一种有效的解决方案被广泛应用于流媒体传输。为优化传输质量、提高用户体验,探讨基于CDN的广播电视流媒体传输质量优化方法。展开更多
流媒体将是未来通信中的杀手业务.本文讨论了流媒体分发系统的关键技术,阐述了基于CDN(Con-tent Distributed Network)和基于P2P(Peer to Peer)的流媒体的研究现状,针对基于CDN的流媒体,研究了流媒体调度算法,代理服务器缓存算法,基于CD...流媒体将是未来通信中的杀手业务.本文讨论了流媒体分发系统的关键技术,阐述了基于CDN(Con-tent Distributed Network)和基于P2P(Peer to Peer)的流媒体的研究现状,针对基于CDN的流媒体,研究了流媒体调度算法,代理服务器缓存算法,基于CDN的交互式操作.针对基于P2P的流媒体,研究了数据分配算法,激励机制,流媒体对象的放置,应用层组播,基于P2P的交互式操作.指出了流媒体的未来研究方向.展开更多
提出一种适用于移动通信网的两级缓存流媒体系统结构2CMSA(two-level cache mobile streaming archi-tecture),它突破了移动流媒体系统中终端缓存空间小、无线接入网带宽窄的局限;针对2CMSA结构设计了基于两级缓存的移动流媒体调度算法2...提出一种适用于移动通信网的两级缓存流媒体系统结构2CMSA(two-level cache mobile streaming archi-tecture),它突破了移动流媒体系统中终端缓存空间小、无线接入网带宽窄的局限;针对2CMSA结构设计了基于两级缓存的移动流媒体调度算法2CMSS(two-level cache based mobile streaming scheduling algorithm),建立数学模型分析了其性能;仿真实验证明,与原有的移动流媒体系统相比,使用2CMSS调度算法能够有效地节省网络传输开销,降低用户启动时延。展开更多
基金the support from the Natural Science Foundation of China (Grant No.61571378)
文摘The emergence of self-driving technologies implies that a future vehicle will likely become an entertainment center that demands personalized multimedia contents with very high quality. The surge of vehicular content demand brings significant challenges for the fifth generation(5G) cellular communication network. To cope with the challenge of massive content delivery, previous studies suggested that the 5G mobile edge network should be designed to integrate communication, computing, and cache(3C) resources to enable advanced functionalities such as proactive content delivery and in-network caching. However, the fundamental benefits achievable by computing and caching in mobile communications networks are not yet properly understood. This paper proposes a novel theoretical framework to characterize the tradeoff among computing, cache, and communication resources required by the mobile edge network to fulfill the task of content delivery. Analytical and numerical results are obtained to characterize the 3C resource tradeoff curve. These results reveal key insights into the fundamental benefits of computing and caching in vehicular mobile content delivery networks.
文摘随着互联网技术的发展和普及,广播电视流媒体传输已经成为人们获取信息和娱乐的重要方式之一。然而由于网络环境的复杂性和不稳定性,如何保证流媒体传输的质量成一个重要的问题。内容分发网络(Content Distribution Network,CDN)作为一种有效的解决方案被广泛应用于流媒体传输。为优化传输质量、提高用户体验,探讨基于CDN的广播电视流媒体传输质量优化方法。
文摘流媒体将是未来通信中的杀手业务.本文讨论了流媒体分发系统的关键技术,阐述了基于CDN(Con-tent Distributed Network)和基于P2P(Peer to Peer)的流媒体的研究现状,针对基于CDN的流媒体,研究了流媒体调度算法,代理服务器缓存算法,基于CDN的交互式操作.针对基于P2P的流媒体,研究了数据分配算法,激励机制,流媒体对象的放置,应用层组播,基于P2P的交互式操作.指出了流媒体的未来研究方向.
文摘提出一种适用于移动通信网的两级缓存流媒体系统结构2CMSA(two-level cache mobile streaming archi-tecture),它突破了移动流媒体系统中终端缓存空间小、无线接入网带宽窄的局限;针对2CMSA结构设计了基于两级缓存的移动流媒体调度算法2CMSS(two-level cache based mobile streaming scheduling algorithm),建立数学模型分析了其性能;仿真实验证明,与原有的移动流媒体系统相比,使用2CMSS调度算法能够有效地节省网络传输开销,降低用户启动时延。
