NDLI: The wireless hierarchical token bucket: a channel aware scheduler for 802.11 networks

Content Provider	IEEE Xplore Digital Library
Author	Garroppo, R.G. Giordano, S. Lucetti, S. Valori, E.
Copyright Year	2005
Description	Author affiliation: Dept. of Inf. Eng., Pisa Univ., Italy (Garroppo, R.G.; Giordano, S.; Lucetti, S.; Valori, E.)
Abstract	The paper proposes an architecture for a scheduling algorithm to be integrated in IEEE 802.11 access points (AP), able to take into account, besides the transport service class required by the destination user, the channel quality experienced by the destination mobile station (STA). The relevance of this topic is due to the observation that when one or more STAs experience poor radio channel conditions, they increase the time spent to transmit a single packet, due to the retransmission of corrupted frames and the adoption of transmission techniques at a lower bit rate, leading to an inefficient use of the shared medium. These phenomena give, as a consequence, a worsening of the performance of all the STAs sharing the wireless medium, independent of their radio channel conditions. The adoption of a scheduling algorithm able to manage information on channel quality permits these effects to be reduced, not penalizing the STAs experiencing good channel conditions and, as a consequence, their experienced throughput. As a result, only the STAs in bad channel conditions experience a reduction of throughput. A prototype of an AP equipment implementing the proposed architecture is presented: it was obtained by modifying the hierarchical token bucket (HTB) and is referred to as wireless hierarchical token bucket (WHTB). The performance of the presented prototype is evaluated experimentally and compared with those obtained with standard scheduling algorithms, which do not take into account information on channel quality.
Sponsorship	IEEE Comput. Soc. Univ. of Texas at Arlington IEEE Tech. Comm. on Comput. Commun. (TCCC)
Starting Page	231
Ending Page	239
File Size	169930
Page Count	9
File Format	PDF
ISBN	0769523420
DOI	10.1109/WOWMOM.2005.103
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Bit rate Prototypes Access protocols Traffic control Throughput Information management Multiaccess communication Network interfaces Scheduling algorithm
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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