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Business models and resource management for shared wireless networks
KTH, Superseded Departments, Wireless at KTH.
KTH, Superseded Departments, Wireless at KTH.
KTH, Superseded Departments, Wireless at KTH.
2004 (English)In: VTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7 - WIRELESS TECHNOLOGIES FOR GLOBAL SECURITY, NEW YORK: IEEE , 2004, 3393-3397 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we analyze main use cases for sharing wireless access networks between multiple operators and service providers. Network sharing has been proposed as a metho l to lower roll-out costs for 3G operators in Europe, and is widely used in WLAN systems where local access providers offer wireless access to service providers. A similar structure also exist in cellular networks where Mobile Virtual Network Operators (MVNO) provide mobile services without having a mobile network of their own. The development points at a further fragmentation of wireless access networks into specialized service providers that connect to local service and access providers, possibly via an inter-connection provider serving with core network functionality. In this context, we propose a framework for how radio resources could be managed using Service Level Agreements (SLA) and analyze key differences between the SLA for different types of service and network providers.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2004. 3393-3397 p.
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-25996DOI: 10.1109/VETECF.2004.1404693ISI: 000227931904070Scopus ID: 2-s2.0-17144431913ISBN: 0-7803-8521-7 (print)OAI: oai:DiVA.org:kth-25996DiVA: diva2:361233
Conference
60th IEEE Vehicular Technology Conference Los Angeles, CA, SEP 26-29, 2004
Note
QC 20101108Available from: 2010-11-08 Created: 2010-11-08 Last updated: 2012-03-23Bibliographically 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

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