基于SCTP多宿特点的多路径同时传输研究

Research on Multipath Transfer Using SCTP Multihoming

多宿是SCTP协议的一个重要特点,利用这个特点,发送端可以将数据通过不同的路径发送给接收端。虽然SCTP提供了对多宿的支持,但仅仅是为了提高关联的可靠性,当前SCTP协议只允许同时使用一条路径传输数据;如果能够同时利用多条路径传输数据,必能极大提升关联的吞吐量。分析了基于SCTP多宿特点的多路径同时传输关键技术,这些关键技术包括快重传触发技术、拥塞控制窗口增长技术、延迟应答技术、接收端缓冲区阻塞减轻技术以及重传时的路径选择技术。

Multihomiug is one of the most important features in SCTP, which can be used by the data sender to send data to. a receiver through different paths. Although SCTP provides support for multihomiug, the basic reason for such a provision was to improve reliability of associations, simultaneous transfer of new data to multiple paths is currently not allowed in SCTP. We cart gain significant t.hroughput improvement if simultaneously transfer new data across multiple paths to the receiver. In this article, the multi＇path transfer using SCTP multihomiug is discussed and the techniques are analyzed, These techniques include fast retrafisrnisson starting technique; CWND growth technique, delayed ACK technique, receive buffer block reducing technique and retransmission policies.