可避免数据包乱序的网络层软切换方法及其性能分析

Translated title of the contribution: Performance analysis of a network-layer soft vertical handoff scheme without packet reordering

Tong Shu*, Min Liu, Zhong Cheng Li

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

With the integration of heterogeneous wireless technologies and the popularization of all-IP networks, network-layer soft handoff approaches have gradually evolved to improve the performance of vertical handoffs (VHOs). Unfortunately, the existing soft handoff approaches lead to plenty of out-of-order packets during downward VHOs. In this paper, the authors present a new network-layer soft vertical handoff scheme, called SHORDER. In the scheme, the mobile node (MN) starts or stops buffering packets from its new network based on a few interactive messages with its home agent (HA). With the buffering technique, the scheme can prevent mobile terminals from receiving reordered packets caused by downward VHOs, and is compatible with various transport-layer protocols and their variants due to its independence. Then, the authors theoretically analyze the influence of the proposed scheme on the handoff latency, the goodput and the congestion window of the TCP in comparison with a typical existing network-layer soft VHO method. Additionally, the authors also derive the applicable condition of the SHORDER scheme. Experiments show that the deployment of the proposed scheme is easy and the scheme has better performance under its applicable condition, further, experimental and analytical results are consistent with each other. Finally, based on the applicable condition of the SHORDER scheme, the scheme further is improved.

Original languageChinese
Pages (from-to)23-35
Number of pages13
JournalJisuanji Xuebao/Chinese Journal of Computers
Volume33
Issue number1
DOIs
Publication statusPublished - Jan 2010
Externally publishedYes

Keywords

  • Fast retransmission
  • Heterogeneous wireless networks
  • Packet reordering
  • Soft downward vertical handoffs
  • TCP goodput

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