NDLI: Power-controlled data prefetching/caching in wireless packet networks

Content Provider	IEEE Xplore Digital Library
Author	Gitzenis, S. Bambos, N.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng., Stanford Univ., CA, USA (Gitzenis, S.; Bambos, N.)
Abstract	We investigate efficient schemes for data communication from a server to a mobile terminal over a wireless channel of fluctuating quality. A user requests to access various data items on the terminal. If a requested item is found in the local terminal buffer or cache, no access delay is incurred. If not, it is downloaded from the server and the user incurs a delay cost until it becomes locally available. Moreover, a power cost is incurred to transmit the data item at a selected power level over the wireless link. To lower both the average delay and power costs, the system may prefetch data items and predictively cache them on the terminal - especially during link quality 'highs' - in anticipation of future user requests. The goal is to minimize the overall delay and power cost, by judiciously choosing which data item to fetch and what power level to use, given the current user, buffer, and channel states. We develop a modeling framework - based on controlled Markov chains and dynamic programming - capturing the essential performance tradeoffs in the system and allowing computation of optimal decisions on items to (pre)fetch and power levels to use. To cope with emerging complexities, we then design efficient heuristics, whose simulation analysis demonstrates substantial performance gains over standard approaches.
Sponsorship	IEEE Comput. Soc. IEEE Commun. Soc
Starting Page	1405
Ending Page	1414
File Size	338052
Page Count	10
File Format	PDF
ISBN	0780374762
ISSN	0743166X
DOI	10.1109/INFCOM.2002.1019391
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-06-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Prefetching Delay Costs Data communication Network servers Power system modeling Optimal control Dynamic programming Computational modeling Analytical models
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science

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 Libarray 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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