TCP Performance Enhancement for UMTS Access Network

Liang Hu

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

681 Downloads (Pure)


We aim at optimize the TCP performance over UMTS access network challenged by the large delay bandwidth product that is mainly caused by the latency from the link layer ARQ retransmissions and diversity technique at physical layer. We propose to place a split TCP proxy at GGSN nodes which is between UMTS access network and Internet. The split proxy divides the bandwidth delay product into two parts, resulting in two TCP connections with smaller bandwidth delay products. Simulation results show, the split TCP proxy can significantly improve the TCP performance under high bit rate DCH channel scenario (e.g.256 kbps). Besides, the split TCP proxy brings more performance gain for downloading large files than downloading small ones. Finally, an aggressive initial TCP congestion window size at proxy can brings even more performance gain for radio links with high data rates DCH channels with large delay bandwidth product.
Original languageEnglish
Title of host publicationSERSC : 2. International Conference on Future Generation Communication and Networking (FGCN 2008)
Place of PublicationHainan Island, China
Publication date2008
ISBN (Print)978-1-4244-3430-5
Publication statusPublished - 2008
EventInternational Conference on Future Generation Communication and Networking (FGCN 2008) -
Duration: 1 Jan 2008 → …
Conference number: 2


ConferenceInternational Conference on Future Generation Communication and Networking (FGCN 2008)
Period01/01/2008 → …

Bibliographical note

Copyright: 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE


Dive into the research topics of 'TCP Performance Enhancement for UMTS Access Network'. Together they form a unique fingerprint.

Cite this