NDLI: Popularity-aware back-tracing partition cooperative cache distribution for space

Content Provider	IET Digital Library
Author	Li, Yue Wang, Ye Yuan, Peng Zhang, Qinyu Yang, Zhihua
Abstract	Space-terrestrial integrated networks consisting of low earth orbit (LEO) satellites and terrestrial users are widely developed for potentially diversified requirements of content distribution. With an obviously time-varying topology, however, designing a distribution strategy faces several explicit challenges, such as prolonged content access latency and significant transmission overheads, due to lack of contact opportunities and limited on-board storage space. In this study, therefore, a novel back-tracing partition directed on-path caching distribution mechanism (BPDM) is proposed for the file distribution in the hybrid LEO constellation and terrestrial network. In the proposed strategy, a group of feasible on-path cache nodes is iteratively selected by utilising a well-designed cross-timeslot graph, as well as a collaborative cached content placement strategy, called as multiple regions cooperative cache algorithm, by carefully considering diversified popularity of target files. As a result, the proposed BPDM could efficiently reduce redundant transmissions of content access for different users by fetching objective file mainly from limited quantities of intermediate caching nodes. Through the simulation results, the proposed method can obviously decrease the holistic overheads and access delay compared with the minimum spanning tree algorithm and Network Central Location (NCL) node selection metric.
Starting Page	2786
Ending Page	2796
Page Count	11
ISSN	17518628
Volume Number	13
e-ISSN	17518636
Issue Number	Issue 17, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/13/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.6077
Journal	IET Communications
Publisher Date	2019-07-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Back-tracing Partition Directed On-path Caching Distribution Mechanism BPDM Cache Distribution Cache Storage Collaborative Cached Content Placement Strategy Combinatorial Mathematics Communication Network Design, Planning And Routing Content Distribution Cooperative Communication Cross-timeslot Graph Distribution Strategy File Distribution Hybrid LEO Constellation Intermediate Caching Node LEO Satellites Low Deployment Cost Low Earth Orbit Satellites Mathematics Minimum Spanning Tree Algorithm Multiple Region Cooperative Cache Algorithm NCL Node Selection Metric Objective File Fetching On-board Storage Space On-path Cache Node On-path Caching Distribution Mechanism Popularity-aware Back-tracing Partition Cooperative Cache Distribution Prolonged Content Access Prolonged Content Access Latency Satellite Communication System Space–terrestrial Integrated Networks Telecommunication Network Topology Time-varying Topology Transmission Overheads Trees
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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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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