NDLI: QoS-Based Resource Allocation for Next-Generation Spacecraft Networks

Content Provider	IEEE Xplore Digital Library
Author	Kandhalu, A. Rajkumar, R.
Copyright Year	2012
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA (Kandhalu, A.; Rajkumar, R.)
Abstract	Current spacecraft systems generally have monolithic structures, but a "fractionated" architecture is being considered for next generation spacecrafts. A fractionated spacecraft system is a cluster of independent modules that communicate wirelessly to maintain cluster flight formations and realize the functions usually performed by a monolithic satellite. The envisioned benefits of the fractionated approach include enhanced responsiveness, greater flexibility, robustness and co-existence of multiple missions from different sources with varying degree of trust. The fractionated architecture, however, introduces significant new challenges from the perspective of resource allocation and management. The mobile nature of the clusters and the modules within the cluster implies that the network topology is highly time-varying. A cluster with multiple missions can require messages to be transmitted across the network with varying degrees of QoS requirements such as timeliness and data delivery reliability. The system must determine the appropriate and timely resource allocation for these missions. In this paper, we address these resource allocation challenges by introducing an abstraction of dynamic graphs, and extending the QoS based Resource Allocation Model (Q-RAM) to operate on these dynamic graphs. We develop a mechanism to decompose a dynamic graph into multiple static sub-graphs using which the resource allocation problem is partitioned into multiple sub-problems within each of these static sub-graphs. We have experimentally evaluated our solution by building a simulation framework called SatSim, which can handle a variety of satellite configurations and mobility models. The proposed solution is shown to achieve a near-optimal solution for the resource allocation problem in time-varying networks, while reducing time complexity significantly.
Sponsorship	IEEE Comput. Soc.
Starting Page	163
Ending Page	172
File Size	1175273
Page Count	10
File Format	PDF
ISBN	9781467330985
ISSN	10528725
DOI	10.1109/RTSS.2012.68
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-04
Publisher Place	Puerto Rico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space vehicles Satellites Quality of service Network topology Resource management Orbits Delay
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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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