IP Satellite Network Architecture for Effective TCP Performance

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9453-12-M-0086
Agency Tracking Number: F11B-T12-0218
Amount: $99,966.00
Phase: Phase I
Program: STTR
Awards Year: 2012
Solicitation Year: 2011
Solicitation Topic Code: AF11-BT12
Solicitation Number: 2011.B
Small Business Information
Scientific Systems Company, Inc
500 West Cummings Park - Ste 3000, Woburn, MA, -
DUNS: 859244204
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Michael Perloff
 Senior Research Engineer
 (781) 933-5355
Business Contact
 Jay Miselis
Title: Corporate Controller
Phone: (781) 933-5355
Email: contracts@ssci.com
Research Institution
 Ohio State University
 Christa Yandrich
 1960 Kenny Road
Columbus, OH, 43210-3210
 (614) 247-6080
 Nonprofit college or university
ABSTRACT: Satellite networks provide high bandwidth global communications without relying on existing infrastructure. Current satellite system use is impeded by round trip delays and limited ground access points. Future IP based LEO/MEO satellite networks offer smaller delays and flexible, high capability communications. Propagation delays, highly dynamic links, higher error rates, dynamic satellite access points for ground and airborne users, potential satellite losses, and limited Onboard processing capability all challenge current routing and TCP protocols. In this project we extend routing algorithms, develop new TCP methods, and use DTN methods to surmount these problems. The TCP methods are designed to be compatible with IPSec and do not require changes in existing TCP modules. In Phase I, we start with widely cited IP LEO/MEO satellite network algorithms developed by academic partner Prof. E. Ekici of Ohio State University and TCP methods from other SSCI projects. In Phase II, we extend the Phase I algorithms, and throughly characterize their performance. Prof. Ekici's expertise in satellite routing and satellite network capabilities and architecture, combined with SSCI's work in applying DTN methods and improving TCP effiency in wireless networks will ensure a successful Phase I feasibility demonstration and development of effective methods in Phase II. BENEFIT: The protocols developed in this effort will be suitable for inclusion in future IP-based military satellite systems. The TCP and other protocols developed in this effort do not assume that IP headers can be read in the interior of the satellite networks; Instead they use information obtained from queries to routing modules (using metric and other data collected and distributed through the routing modules). Specific header information is used only at the network edge and the queries do not directly obtain network topology information. These features will help ensure compatability with IPSec and other security measures in military networks. The measures will improve performance in emergency networks and other wireless networks subject to interference, unreliable communications nodes, power limitations and intermittent outages.

* information listed above is at the time of submission.

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