基于SCTP的跨终端切换与移动性管理
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摘要
文中面向多终端及异构网络的应用环境,基于流控制传输协议(SCTP)的传输层(L4)移动性管理,提出了不中断端到端连接的跨终端切换方法。为兼容SCTP偶联的协议规程,利用动态地址重配置(DAR)控制新终端的加入,运用重启机制更新偶联的认证,通过路径切换管理跨终端的传输迁移。讨论了基于Linux和开源软件包的实时流媒体播放的原型设计及实现,采用原型实验的手段,给出了可行性验证和跨终端切换的时延性能。结果表明,在内部网环境中,基于SCTP流媒体传输可在不同终端间平稳切换,视觉中断时间小于1秒。
Considering the application environment of multiple terminals in heterogeneous networks,an inter-terminal handover scheme supporting non-interruptive end-to-end connection is proposed based on L4 mobility management using stream control transmission protocol( SCTP). To be compatible with the specifications of SCTP association,the scheme employs dynamic address reconfiguration( DAR) to control the joining of new terminals,uses the mechanism of association restarting to realize verification updating across terminals,and manages across-terminal transmission migration through SCTP path switch. A real-time streaming playback prototype is designed and implemented using Linux and open-source software packages. Prototype experiments provide feasibility verification and the latency performance of across-terminal handover. Results show that in a LAN environment,multimedia streaming can be smoothly switched among different terminals with video interrupted less than 1 s.
Considering the application environment of multiple terminals in heterogeneous networks,an inter-terminal handover scheme supporting non-interruptive end-to-end connection is proposed based on L4 mobility management using stream control transmission protocol( SCTP). To be compatible with the specifications of SCTP association,the scheme employs dynamic address reconfiguration( DAR) to control the joining of new terminals,uses the mechanism of association restarting to realize verification updating across terminals,and manages across-terminal transmission migration through SCTP path switch. A real-time streaming playback prototype is designed and implemented using Linux and open-source software packages. Prototype experiments provide feasibility verification and the latency performance of across-terminal handover. Results show that in a LAN environment,multimedia streaming can be smoothly switched among different terminals with video interrupted less than 1 s.
引文
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[5]KOH S,CHANG M,LEE M.mSCTP for soft Handover in transport layer[J].IEEE Communications Letters,2004,8(3):189-191.
[6]LEI P,ONG L,T X¨XEN M,et al.IEEE RFC5351 An Overview of Reliable Server Pooling Protocols[S].2008.
[7]LEU F Y.A novel network mobility handover scheme using SIP and SCTP for multimedia applications[J].Journal of Network and Computer Applications,2009,32(5):1073-1091.
[8]STEWART R.IETF RFC 4960 Stream Control Transmission Protocol[S].2007.
[9]STEWART R,XIE Q,TUEXEN M,et al.IETF RFC 5061 Stream Control Transmission Protocol(SCTP)Dynamic Address Reconfiguration[S].2007.
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