Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
BEST-AP: Non-intrusive estimation of available bandwidth and its application for dynamic access point selection
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap. (DISCO)ORCID-id: 0000-0002-9446-8143
Stanford Univ, Stanford, CA 94305 USA..
Stanford Univ, Stanford, CA 94305 USA..
Visa övriga samt affilieringar
2014 (Engelska)Ingår i: Computer Communications, ISSN 0140-3664, E-ISSN 1873-703X, Vol. 39, s. 78-91Artikel i tidskrift (Refereegranskat) Published
Resurstyp
Text
Abstract [en]

The coverage area of Access Points CAPS) in Wireless Local Area Networks (WLANs) often overlaps considerably. Hence, a station can potentially associate with many APs. In traditional IEEE 802.11 systems, the station associates to the AP with the strongest signal. This strategy may result in load imbalance between APs and thus low overall network throughput. This paper proposes a new mechanism for selecting the "best" AP based on a novel available bandwidth estimation scheme. The available bandwidth provided by an AP depends mainly on the signal quality and the load on the wireless channel. Based on measurements we first analyze how those factors vary stochastically over time and motivate why a frequent estimation of available bandwidth is necessary. We then develop BEST-AP, a system for Bandwidth ESTimation of Access Points, which uses regular data traffic to estimate the available bandwidth from all APs in reach in a non-intrusive way, even if they are on a different channel. Based on OpenFlow, BEST-AP allows the station to be associated with multiple APs simultaneously and to switch between APs with low overhead. Using the available bandwidth estimates, the system exploits the "best" AP for longer duration while probing the less good APs for shorter durations to update the bandwidth estimations. The evaluation in a WLAN testbed shows that with background load created from real WLAN traces, the dynamic selection of APs improves the throughput of a station by around 81%, compared to a static selection. When the station is mobile, the throughput increases by 176% on average.

Ort, förlag, år, upplaga, sidor
Elsevier, 2014. Vol. 39, s. 78-91
Nyckelord [en]
WLAN, Handover, Mobility, Bandwidth estimation, Software defined networking
Nationell ämneskategori
Data- och informationsvetenskap
Forskningsämne
Datavetenskap
Identifikatorer
URN: urn:nbn:se:kau:diva-41552DOI: 10.1016/j.comcom.2013.11.006ISI: 000331504400009OAI: oai:DiVA.org:kau-41552DiVA, id: diva2:923103
Tillgänglig från: 2016-04-25 Skapad: 2016-04-11 Senast uppdaterad: 2018-01-10Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Dely, PeterKassler, Andreas

Sök vidare i DiVA

Av författaren/redaktören
Dely, PeterKassler, Andreas
Av organisationen
Institutionen för matematik och datavetenskap
I samma tidskrift
Computer Communications
Data- och informationsvetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 139 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf