Abstract: With the increasing diversity in network access technology and the lower cost of access device, more and more mobile terminals have multi-homing property. But current TCP/IP protocol stack can only use single interface for transmission, and it cannot make full advantage of multi-homing. On the basis of Stream Control Transmission Protocol (SCTP), this paper designed path selection module and fast path handover module and implemented a solution for wireless Concurrent Multipath Transfer (CMT), which made using multiple interfaces to transmit at the same time available. The effects of bandwidth aggregation and fast path handover of Wireless CMT were tested in a real wireless network environment. The test results reveal that the Wireless CMT obviously improves the efficiency and reliability of wireless transmission.

Key words: Stream Control Transmission Protocol (SCTP), multi-homing, wireless Concurrent Multipath Transfer (CMT), path selection, fast path handover

摘要： 随着网络接入技术的多样和接入设备的廉价，越来越多的移动终端具备多家乡的特性，而现有TCP/IP协议栈只能使用单一接口传输数据，无法充分利用多家乡的优势。在流控制传输协议(SCTP)基础上，设计了路径选择模块和快速路径切换模块，实现了一种无线并行多路径传输（Wireless CMT）解决方案，使得多家乡终端能够同时使用多个接口并行传输数据。在实际无线网络环境对Wireless CMT带宽聚合效果和快速路径切换效果分别进行测试验证。测试结果表明，Wireless CMT使无线网络传输效率和可靠性都得到了明显提升。

关键词: 流控制传输协议, 多家乡, 无线并行多路径传输, 路径选择, 快速路径切换