Abstract
The use of HAPS/UAV to enhance telecommunication capabilities has been proposed as an effective solution to support hot spot communications in limited areas. To ensure communication capabilities even in case of emergency (earthquake, power blackout, chemical/nuclear disaster, terrorist attack), when terrestrial fixed and mobile infrastructures are damaged or become unavailable, the access to satellites represents a reliable solution with worldwide coverage, even though it may suffer from shadowing impairment, especially in an urban environment. In this paper we approach an innovative and more challenging architecture foreseeing HAPS/UAV connected to the satellite in order to enlarge coverage and to allow interconnection with very remote locations. In this scenario, we have analysed TCP-based applications proposing some innovative techniques, both at protocol and at architectural level, to improve performance. In particular, we propose the use of a PEP technique, namely splitting, to speed up window growth in spite of high latency, combined with TCP Westwood as a very efficient algorithm particularly suitable and well performing over satellite links.
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Abbreviations
- ABSE:
-
Adaptive Bandwidth Share Estimation
- ARQ:
-
Automatic Repeat Request
- ERE:
-
Eligible Rate Estimate
- HAPS:
-
High-Altitude Platform Station
- RTT:
-
Round-Trip Time
- TCP:
-
Transmission Control Protocol
- UAV:
-
Unmanned Aerial Vehicle
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Cesare Roseti graduated cum laude in 2003 in Electronic Engineering at University of Rome “Tor Vergata”. In 2003 and 2004, he was a visiting student at Computer Science Department of University of California, Los Angeles (UCLA). Since 2004 he is a PhD student at the Electronic Engineering Department and his research interests include satellites communications and transport protocols in heterogeneous (wired/wireless) systems.
Claudio Enrico Palazzi studied computer science at University of Bologna, Campus of Cesena. He has been a student representative in several bodies of University of Bologna and, in particular, from 2000 to 2001 he was part of the Board of Governors. In 2001, he received the Sigillum Magnum of Alma Mater Studiorum University of Bologna. He graduated cum laude in 2002 with a thesis on transport protocols in wireless environments. In 2003, he was the first student enrolled in the Interlink joint PhD program in computer science by which he is currently a PhD student in Computer Science at both University of Bologna and University of California, Los Angeles (UCLA). His research interests include protocol design, implementation and performance analysis for wired/wireless networks.
Michele Luglio received the Laurea degree in electronic engineering from the University of Rome “Tor Vergata”. He received the PhD degree in telecommunications in 1994. From August to December 1992 he worked as visiting staff engineering at Microwave Technology and Systems Division of Comsat Laboratories (Clarksburg, Maryland, USA). He received the Young Scientist Award from ISSSE’95. Since October 1995, he is research and teaching assistant at University of Rome “Tor Vergata” where he works on designing satellite systems for multimedia services both mobile and fixed, in the frame of projects funded by EC, ESA and ASI. He taught signal theory and collaborated in teaching digital signal processing and elements of telecommunications. In 2001 and 2002 he was visiting professor at the Computer Science Department of University of California Los Angeles (UCLA) to teach Satellite Networks class. Now he teaches satellite telecommunications and signals and transmission. He is a member of IEEE.
Mario Gerla received a graduate degree in engineering from the Politecnico di Milano in 1966, and the MS and PhD degrees in engineering from UCLA in 1970 and 1973, respectively. After working for Network Analysis Corporation from 1973 to 1976, he joined the Faculty of the Computer Science Department at UCLA where he is now professor. His research interests cover the performance evaluation, design and control of distributed computer communication systems; high-speed computer networks; wireless LANs; and ad hoc wireless networks. He has worked on the design, implementation and testing of various wireless ad hoc network protocols (channel access, clustering, routing and transport) within the DARPA WAMIS, GloMo projects. Currently, he is leading the ONR MINUTEMAN project at UCLA, and is designing a robust, scalable wireless ad hoc network architecture for unmanned intelligent agents in defense and homeland security scenarios. He is also conducting research on QoS routing, multicasting protocols and TCP transport for the Next-Generation Internet (see www.cs.ucla.edu/NRL for recent publications). He became IEEE Fellow in 2002.
M. Yahya “Medy” Sanadidi was born in Damanhour, Egypt. He received his high school diploma from College Saint Marc, and his BSc in electrical engineering (computer and automatic control section) from the University of Alexandria, Egypt. Dr. Sanadidi received his PhD in computer science from UCLA in 1982. He is currently a research professor at the UCLA Computer Science Department. As co-principal investigator on NSF-sponsored research, he is leading research in modeling and evaluation of high-performance Internet protocols. He teaches undergraduate and graduate courses at UCLA on queuing systems and computer networks. Dr. Sanadidi was a manager and senior consulting engineer at Teradata/AT&T/NCR from 1991 to 1999 and led several groups responsible for performance modeling and analysis, operating systems, and parallel query optimization. From 1984 to 1991, he held the position of computer scientist at Citicorp, where he pursued R&D projects in wireless metropolitan area data communications and other networking technologies. In particular, between 1984 and 1987, he lead the design and prototyping of a wireless MAN for home banking and credit card verification applications. From 1981 to 1983, Dr. Sanadidi was an assistant professor at the Computer Science Department, University of Maryland, College Park, Maryland. There, he taught performance modeling, computer architecture and operating systems, and was principal investigator for NSA-sponsored research on global data communications networks. Dr. Sanadidi has consulted for industrial concerns, has co-authored conference as well as journal papers, and holds two patents in performance modeling. He participated as reviewer and as program committee member of professional conferences. His current research interests are focused on congestion control and adaptive multimedia streaming protocols in heterogeneous (wired/wireless) networks.
James Stepanek received his BS in computer science from Harvey Mudd College in 1994 and his MS in computer science from University of California, Los Angeles (UCLA) in 2001 where he is currently enrolled in the PhD program. He is also currently a member of the technical staff in the Computer Systems Research Department of The Aerospace Corporation. His research interests include wireless and satellite networks.
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Palazzi, C.E., Roseti, C., Luglio, M. et al. Enhancing Transport Layer Capability in HAPS–Satellite Integrated Architecture. Wireless Pers Commun 32, 339–356 (2005). https://doi.org/10.1007/s11277-005-0751-2
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DOI: https://doi.org/10.1007/s11277-005-0751-2