liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Voice-over-IP over Enhanced Uplink
Linköping University, Department of Electrical Engineering.
2007 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesisAlternative title
Kapacitet för IP-telefoni i den förbättrade WCDMA-upplänken (Swedish)
Abstract [en]

The traditional voice service in mobile networks is an important service that mobile users expect high quality from. With the convergence of mobile networks towards an all-IP network, an IP-based speech service becomes important which is referred to as Voice-over-IP (VoIP). The traditional voice service is highly optimized and a VoIP service must therefore fulfil strict quality requirements to provide the same speech service quality. The air interface technology, WCDMA, which is used in third generation communication systems in Europe is constantly developed. An improved concept for the mobile-to-network transmission, called the Enhanced Uplink (EUL) provides for higher uplink capacity for packet data services. It also includes features that may provide a sufficient VoIP service quality in mobile networks, when considering the uplink transmission.

The purpose of this thesis is to evaluate the VoIP capacity over EUL and identify crucial aspects of radio resource management in order to increase the capacity. This is done through dynamic system simulations, using a realistic VoIP traffic model. The VoIP capacity is also estimated by a derived theoretical framework.\newline

It is shown by simulation results and theoretical estimations, that power control is a vital mechanism in order to increase the capacity. Simulation results indicate that a VoIP over EUL capacity of 65\% of the traditional voice service capacity may be reached. The results also indicate that to improve the capacity for larger cells, the allowed VoIP packet delay must be increased.

Place, publisher, year, edition, pages
2007. , 79 p.
Keyword [en]
3G, WCDMA, Enhanced Uplink, VoIP
National Category
Control Engineering
URN: urn:nbn:se:liu:diva-8479ISRN: LITH-ISY-EX-07/3941-SEOAI: diva2:23246
2007-03-02, Systemet, B-huset, Linköping, 13:15
Available from: 2007-03-07 Created: 2007-03-07

Open Access in DiVA

fulltext(632 kB)926 downloads
File information
File name FULLTEXT01.pdfFile size 632 kBChecksum SHA-1
Type fulltextMimetype application/pdf

By organisation
Department of Electrical Engineering
Control Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 926 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: 1013 hits
ReferencesLink to record
Permanent link

Direct link