NDLI: WLC24-3: Modelling the Impact of User Mobility on the Throughput in Networks of Wireless 802.11 LANs

Content Provider	IEEE Xplore Digital Library
Author	Bhulai, S. van der Mei, R. Taoying Yuan
Copyright Year	2006
Description	Author affiliation: Fac. of Sci., Vrije Univ. Amsterdam, Amsterdam (Bhulai, S.; van der Mei, R.)
Abstract	The wireless LAN technology 802.11, also called Wi-Fi, offers high speed wireless Internet access for local area environments. WLANs provide much higher data rates than the mobile 2.5G and 3G networks and are relatively cheap and easy to install and maintain. Consequently, the popularity of WLANs has experienced tremendous growth over the past few years and WLAN technology has become a viable alternative to 2.5/3G mobile networks in providing Internet access in densely populated urban areas. The physical characteristics of a WLAN introduce range limitations and unreliable media, dynamic topologies where stations move about, interference from outside sources, and lack of the ability for every device to hear every other device within the WLAN. Due to these limitations service providers are faced with the problem to select and dimension the infrastructure of their WLAN networks caused by difficulties in performance evaluation. The main barrier, however, to the sustained growth of the use of WLANs is their limited capabilities to support user mobility, both in terms of coverage and handover control. Therefore, it is crucial for WLAN service providers to carefully design their networks in terms of the placement of hot spots, explicitly taking into account mobility patterns of the users. To address this design problem, in this paper we develop a simple model for the performance of WLAN networks, taking into account the limitations in coverage and handover control. The model captures the statistical behaviour of TCP packets at the MAC layer, taking into account the effects of initiation and completion of data transfers due to mobility of the stations when entering or leaving a cell. We develop closed-form expressions for the throughput of TCP flows in IEEE 802.11 WLANs in the presence of multiple classes of customers with different mobility patterns in multiple cells. The expressions are shown to be highly accurate when validated by simulation results.
Starting Page	1
Ending Page	5
File Size	171109
Page Count	5
File Format	PDF
ISBN	1424403561
ISSN	1930529X
DOI	10.1109/GLOCOM.2006.753
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput Wireless LAN Media Access Protocol Access protocols Internet Network topology Interference Performance analysis Traffic control Communication networks
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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