SHOP: An Integrated Scheme for SCTP Handover Optimization in Multihomed Environments

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference Pub Date : 2008-12-08 DOI:10.1109/GLOCOM.2008.ECP.460

Kun Zheng, Min Liu, Zhongcheng Li, Gang Xu

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引用次数: 9

Abstract

Multihoming feature enables stream control transmission protocol (SCTP) to be a handover and mobility scheme for mobile users in multihomed environment. However, there are two flaws deteriorating SCTP handover performance. First, the congestion control mechanism of SCTP makes entire association experience a slow-start phase after handover, thus leading to a sudden-shrink of throughput. Second, the diversity of round-trip time (RTT) between separate paths incurs packet reordering and likely to trigger the spurious fast-retransmit, which degrades performance of reliable transport, too. This paper presents SHOP: an integrated scheme for SCTP handover optimization. By means of available bandwidth estimation technologies, SHOP avoids the slow-start phase after handover through configuring proper congestion control variables of new primary path. Meanwhile, postpone-handover based on RTT measurement is put forward in SHOP to minimize the negative effects of packet reordering. Detailed simulation results show the effectiveness of proposed scheme.

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SHOP:多归属环境下SCTP切换优化的集成方案

多归属特性使流控制传输协议(SCTP)成为多归属环境下移动用户的切换和移动性方案。但是，存在两个缺陷，影响了SCTP的切换性能。首先，SCTP的拥塞控制机制使整个联盟在切换后经历一个慢启动阶段，从而导致吞吐量的突然缩减。其次，不同路径之间的往返时间(RTT)的多样性会导致数据包重新排序，并可能引发虚假的快速重传，这也会降低可靠传输的性能。提出了一种集成的SCTP切换优化方案SHOP。SHOP利用可用带宽估计技术，通过配置合适的新主路径拥塞控制变量，避免了切换后的慢启动阶段。同时，在SHOP中提出了一种基于RTT度量的延迟切换方法，最大限度地减少了分组重排序的负面影响。详细的仿真结果表明了该方案的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

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