NDLI: On the use of free-space optical links for latency-tolerant traffic applications

Content Provider	IEEE Xplore Digital Library
Author	Czaputa, M. Hranilovic, S. Leitgeb, E.
Copyright Year	2010
Description	Author affiliation: Dept. of Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada (Hranilovic, S.) \|\| Institute of Broadband Communications, Graz University of Technology, Austria (Czaputa, M.; Leitgeb, E.)
Abstract	The growing need for network capacity due to peer-to-peer (P2P) users causes tremendous costs for Internet service providers (ISPs). Traffic shaping schemes have been applied to limit P2P traffic while reducing customer satisfaction and affecting the performance of other applications. As an alternative, in this work we propose the use of inexpensive free-space optical (FSO) links from ISPs to fibre backbones to accommodate latency-tolerant traffic including P2P and other bulk data transfers for backup and storage. For such classes of data traffic, the instantaneous reliability of the link is not the primary concern, rather the average throughput of the link is important. The average throughput and outage characteristics of an FSO link for latency-tolerant traffic are studied using weather data from a major Canadian city. Rather than previous studies which focus on improving the reliability of FSO links, this work considers different modulation techniques with the goal of achieving the highest average throughput for data traffic. For a 1 km link with a 1 ns symbol period, an average annual rate of nearly 1.5 Gbps is possible using 4-PAM modulation as opposed to an average rate of 880 Mbps for conventional on-off keying.
Starting Page	588
Ending Page	592
File Size	412945
Page Count	5
File Format	PDF
ISBN	9781424488582
e-ISBN	9781861353696
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-21
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Snow Modulation Optical attenuators Throughput Optical fiber communication Reliability
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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