Change search
ReferencesLink to record
Permanent link

Direct link
A Cross-Layer Perspective on Transport Protocol Performance in Wireless Networks
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (Distributed Systems and Communications Research Group)ORCID iD: 0000-0003-0368-9221
2012 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

Communication by wireless technologies has seen a tremendous growth in the last decades. Mobile phone technology and wireless broadband solutions are rapidly replacing the last-hop wireline connectivity for telephones and Internet access.  Research has, however, shown that Internet traffic can experience a performance degradation over wireless compared to wired networks.  The inherent properties of radio communication lead to a higher degree of unreliability, compared to communication by wire or fiber.  This can result in an increased amount of transmission errors, packet loss, delay and delay variations, which in turn affect the performance of the main Internet transport protocols TCP and UDP.  This dissertation examines the cross-layer relationship between wireless transmission and the resulting performance on the transport layer. To this end, experimental evaluations of TCP and UDP over a wireless 4G downlink system proposal are performed.  The experiment results show, in a holistic scenario, that link-level adaptive modulation, channel prediction, fast persistent link retransmissions, and channel scheduling, enables the transport protocols TCP and UDP to perform well and utilize the wireless link efficiently.  Further, a novel approach is proposed where a modified TCP receiver can choose to accept packets that are corrupted by bit errors. Results from network emulation experiments indicate that by accepting and acknowledging even small amounts of corrupted data, a much higher throughput can be maintained compared to standard TCP.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2012. , 202 p.
Karlstad University Studies, ISSN 1403-8099 ; 2012:7
Keyword [en]
Wireless networks, 4G, cross-layer interaction, TCP, UDP, emulation, performance evaluation, optimizations
National Category
Computer Science
Research subject
Computer Science
URN: urn:nbn:se:kau:diva-9572ISBN: 978-91-7063-411-6OAI: diva2:492184
Public defence
2012-05-04, 1B 309, Karlstads universitet, Karlstad, 09:30 (English)
Available from: 2012-04-12 Created: 2012-02-06 Last updated: 2014-09-10Bibliographically approved

Open Access in DiVA

fulltext(2272 kB)547 downloads
File information
File name FULLTEXT02.pdfFile size 2272 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Alfredsson, Stefan
By organisation
Department of Computer Science
Computer Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 551 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 790 hits
ReferencesLink to record
Permanent link

Direct link