Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Performance analysis of non-cosited evolved 2G and 3G multi-access systems
KTH, School of Information and Communication Technology (ICT), Centres, Center for Wireless Systems, Wireless@kth.
KTH, School of Information and Communication Technology (ICT), Centres, Center for Wireless Systems, Wireless@kth.
2006 (English)In: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, Helsinki, 2006Conference paper, Published paper (Refereed)
Abstract [en]

An efficient combination of radio access technologies, integrated in a multi-access network, will be a key enabler in future provisioning of mobile data services. This paper addresses a scenario where an incumbent mobile network operator, with an existing 2G and 3G infrastructure, has deployed a dense WCDMA/HSPA macro-cell network in an urban area. With this high capacity network deployed, upgrading previous 2G and 3G systems with EDGE and HSPA respectively may seem obsolete. However, even though these systems may not support the intended data rates alone, they could, thanks to favorable propagation characteristics and the additional spectrum available, be useful as complements. Simulation results indicate that upgrading GPRS base stations with EDGE, or a sparse WCDMA macro cell layer with HSPA, mainly would benefit uplink transmission. For this case, the data rate that can be guaranteed with 95 % area availability (coverage) can be increased with approximately 40-100 %. In the downlink, though, the dense WCDMA/HSPA system alone supports user data rates of 500 kpbs for all relevant user densities. Thus, upgrading legacy infrastructure would be obsolete.

Place, publisher, year, edition, pages
Helsinki, 2006.
Keyword [en]
Cellular radio systems, Computer networks, Macros, Metropolitan area networks, Mobile radio systems, Network protocols, Radio systems, Regional planning, Technology, Telecommunication systems, Data rates, Downlink (DL), High capacity (Transmission Data Rate), International symposium, Macro cells, Mobile data services, Mobile networks, Mobile radio communications, Multi access networks, Multi access systems, paper addresses, performance analyses, propagation characteristics, Radio Access Technologies (RAT), simulation results, Third generation (3G) systems, Up link transmissions, Urban areas, User data, Wireless networks
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-25997DOI: 10.1109/PIMRC.2006.254249Scopus ID: 2-s2.0-44949175770ISBN: 9781424403295 (print)OAI: oai:DiVA.org:kth-25997DiVA: diva2:361250
Conference
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Helsinki; 11 September 2006 through 14 September 2006
Projects
SRA - Informations- och kommunikationsteknik
Note
QC 20101108Available from: 2010-11-08 Created: 2010-11-08 Last updated: 2011-10-19Bibliographically approved
In thesis
1. Access selection in multi-system architectures: cooperative and competitive contexts
Open this publication in new window or tab >>Access selection in multi-system architectures: cooperative and competitive contexts
2007 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Future wireless networks will be composed of multiple radio access technologies (RATs). To benefit from these, users must utilize the appropriate RAT, and access points (APs). In this thesis we evaluate the efficiency of selection criteria that, in addition to path-loss and system bandwidth, also consider load. The problem is studied for closed as well as open systems. In the former both terminals and infrastructure are controlled by a single actor (e.g., mobile operator), while the latter refers to situations where terminals, selfishly, decide which AP it wants to use (as in a common market-place). We divide the overall problem into the prioritization between available RATs and, within a RAT, between the APs. The results from our studies suggest that data users, in general, should be served by the RAT offering highest peak data rate.

As this can be estimated by terminals, the benefits from centralized RAT selection is limited. Within a subsystem, however, load-sensitive AP selection criteria can increase data-rates. Highest gains are obtained when the subsystem is noise-limited, deployment unplanned, and the relative difference in number of users per AP significant. Under these circumstances the maximum supported load can be increased by an order of magnitude. However, also decentralized AP selection, where greedy autonomous terminal-based agents are in charge of the selection, were shown to give these gains as long they accounted for load. We also developed a game-theoretic framework, where users competed for wireless resources by bidding in a proportionally fair divisible auction. The framework was applied to a scenario where revenue-seeking APs competed for traffic by selecting an appropriate price. Compared to when APs cooperated, modelled by the Nash bargaining solution, our results suggest that a competitive access market, where infrastructure is shared implicitly, generally, offers users better service at a lower cost. Although AP revenues reduce, this reduction is, relatively, small and were shown to decrease with the concavity of demand. Lastly we studied whether data services could be offered in a discontinuous high-capacity network by letting a terminal-based agent pre-fetch information that its user potentially may request at some future time-instant. This decouples the period where the information is transferred, from the time-instant when it is consumed. Our results show that above some critical AP density, considerably lower than that required for continuous coverage, services start to perform well.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. xv, 180 p.
Series
Trita-ICT-COS, ISSN 1653-6347 ; 0701
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-4286 (URN)
Presentation
2007-03-09, Sal NA2, KTH-Electrum, Isafjordsgatan 28 b v, Kista, 14:00
Opponent
Supervisors
Note
QC 20101109Available from: 2007-02-27 Created: 2007-02-27 Last updated: 2010-11-09Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopushttp://www.scopus.com/inward/record.url?eid=2-s2.0-44949175770&partnerID=40&md5=2f6e3198aaa396cf64c1479e5bc7c9a4

Search in DiVA

By author/editor
Hultell, JohanJohansson, Klas
By organisation
Center for Wireless Systems, Wireless@kth
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 41 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf