NDLI: Beacon-based short message exchange in an inner city environment

Content Provider	IEEE Xplore Digital Library
Author	Schnaufer, S. Kopf, S. Lemelson, H. Effelsberg, W.
Copyright Year	2010
Description	Author affiliation: Computer Science IV - University of Mannheim, Seminargebaeude A5, D-68159 Mannheim, Germany (Schnaufer, S.; Kopf, S.; Lemelson, H.; Effelsberg, W.)
Abstract	In this paper, we proposes a method to utilize the huge number of IEEE 802.11 access points in an inner city environment to distribute information such as local sensor values, votes or short text messages. Due to the overlapping channels on IEEE 802.11b/g it is possible to receive packets from neighboring channels by overhearing. This fact allows every access point to monitor a part of the frequency band without switching the current radio channel. Our novel idea is to add user data to network layer beacon packets which every access point continuously send on a user-selected radio channel. This method allows transferring small size messages between access points or an access point and a mobile device without any reconfiguration like disabling the WLAN encryption. We conduct a measurement in the inner city of Mannheim, Germany to evaluate the typical density and distribution of access points in such an environment. We then use the measured data to calculate for every access point the expected reception probability on the street segments around. Based on these statistics, we appraise the reception probabilities of the access points among each other and perform a simulation study to estimate the size of the dissemination area that can be reached. Additionally, we analyze the required time to distribute the information to all reachable access points. Based on the measurement and simulation results, we can conclude that the estimated connectivity of an ad-hoc network based on access points is sufficient to disseminate information in the proximity.
Starting Page	1
Ending Page	8
File Size	1572345
Page Count	8
File Format	PDF
ISBN	9781424484362
e-ISBN	9781424484379
DOI	10.1109/MEDHOCNET.2010.5546868
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-23
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Protocols IEEE 802.11 Standards Bandwidth Cities and towns Ad hoc networks Internet
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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