NDLI: Design and performance of a GPRS based mobile satellite system

Content Provider	IEEE Xplore Digital Library
Author	Ravishankar, C. Peri, S. Barnett, C.
Copyright Year	2004
Description	Author affiliation: Hughes Network Syst. Inc., Germantown, MD, USA (Ravishankar, C.; Peri, S.; Barnett, C.)
Abstract	This paper describes the design and performance of a geo-synchronous mobile satellite system based on enhancements to terrestrial general packet radio service (GPRS). The system provides IP data services with a bidirectional throughput of approximately 144 kbps using transportable laptop sized terminals. The terrestrial GPRS standard was significantly enhanced to achieve better spectral efficiency and improved throughput for satellite operation that is characterized by long delays, spectral scarcity and limited link margins. Enhancements were primarily in the radio specific layers, namely physical layer and MAC/RLC layers, to achieve the necessary spectral efficiency and throughput improvement. The system implements a delay optimized bandwidth on demand (BoD/DAMA), dynamic link adaptation (DLA/DBRA), link layer ARQ, multiple levels of QoS, policy based resource management, load balancing and position based admission control and billing. It permits user mobility across spot-beams within the satellite system as well as between satellite system and terrestrial GPRS.
Starting Page	4032
Ending Page	4036
File Size	2857837
Page Count	5
File Format	PDF
ISBN	0780385217
ISSN	10903038
DOI	10.1109/VETECF.2004.1404835
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ground penetrating radar Satellite broadcasting Throughput Packet radio networks Portable computers Physical layer Delay systems Bandwidth Board of Directors Automatic repeat request
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