【摘要】 新型网络环境致力于为用户提供广覆盖、高带宽、包含各种多媒体业务的服务,而多种接入技术并存的网络环境为无处不在的高质量服务提供了可能.为了适应异构环境,用户终端通常配置多个接口(比如WIFI和4G),通信终端之间可能存在多条路径.多径TCP协议(multipath TCP,MPTCP)是IETF MPTCP工作组提出的新型传输层多径协议,它在兼容TCP协议的基础上,同时利用多条路径的传输能力来进行数据传输,提高带宽利用率,增强连接的恢复能力,并且能够自适应地将数据从拥塞路径转移到非拥塞路径.近年来国内外机构先后作出了大量的研究,逐步使得MPTCP由概念走向实用.总结和阐述了MPTCP相关方面的研究现状,其中包括仿真实现与实际部署、乱序控制、联合拥塞控制、能耗管理、安全以及关于路径选择、移动性和QoS、数据中心中的应用等其他方面的研究.最后给出总结和展望.更多还原

【Abstract】 The newly developed networks hope to bring some specific features,such as wide coverage,high bandwidth,and provide varieties of media services.Fortunately,multiple access techniques are at there to help.Nowadays,terminals are always equipped with multiple interfaces to adapt to the heterogeneous networks.Thus,there are more than one paths existing between two endpoints.MPTCP(multipath TCP)is proposed by IETF MPTCP working group,in addition to compatible with traditional TCP,which utilizes multiple paths to transmit data.It improves the efficiency of bandwidth usage and the resilience of the connection.What’s more,it can adaptively move data from more congested path to less congested path.In recent years,many researches have been carried out to gradually make MPTCP from concept to practice.This paper introduces the technical details of MPTCP standard,and expounds the present situation of the related aspects,including simulation and actual deployment, out-of-order control, coupled congestion control, energy consumption maintenance,security,and other aspects such as path selection,mobility and QoS,the data center scenario,et al.Finally,this paper gives a summary and expectation.更多还原