Internet Network in Space for Small Satellites: Concept and Experiments (original) (raw)
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An Internet router was integrated into the UK-DMC remote-sensing satellite as a secondary experimental payload. This commercial product has been orbiting in space for over three years. We describe the integration of the router and satellite and the successful on-orbit testing of the router, which took place using the Virtual Mission Operations Center (VMOC) application as part of a larger systems internetworking exercise. Placing this Cisco router in Low Earth Orbit (CLEO) onboard a small satellite is one step towards extending the terrestrial networking model to the near-Earth space environment as part of a merged space-ground architecture.
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Broadband Satellite Communications for Internet Access
2004
Part Two , consisting of chapters 6-9, addresses major technical challenges in designing and deploying satellite IP, ATM, and future MPLS networks. The emphasis is on the link layer and above. The physical layer details have been addressed extensively in the literature. The first three chapters of this part deal with technical challenges at various layers. The physical layer, link layer-media access are covered in Chapter 6; satellite IP at network layer, satellite TCP at transport layer with Performance Enhancing Proxies (PEPs) in Chapter 7; and satellite ATM with traffic management and congestion control and end-to-end security in Chapter 8. Chapter 9 provides a current status of standards and regulatory issues for satell ite networks. After descr ibing an overview of the principles of satellite networks and technical challenges for satellite network design in Part One and Part Two, a detailed description of satellite IP networks achieving QoS guarantees and performance is illustrated in Part Three. The purpose of this part is to provide satellite IP networks QoS performance models giving an understanding of the design aspects to be addressed for realization of a satellite network. In Chapter 10, QoS in satellite IP, QoS objectives, QoS architecture alternatives are discussed. Differentiated Services based QoS simulation models for TCP and User Datagram Protocol (UDP) traffic for Geostationary Earth Orbit (GEO) and Medium Earth Orbit (MEO) configurations using Analysis of Variation Techniques are provided in Chapter 11. In Chapter 12, performance of MPLS over a satellite network is described. Interactive multimedia over satellite using Multiple Frequency-Time Division Multiple Access (MF-TDMA) based and Code Division Multiple Access (CDMA) based return channel protocols are presented in chapter 13. Similar to the discussion on satellite IP performance models in Part Three , Part Four addresses satellite ATM networks identifying fundamental questions about buffer requirements, TCP/ATM , efficiency and fairness and multiple access modes in a quantitative way. This part is dedicated to simulation analysis of TCP performance and resulting QoS operating over satell ite links. Several proposals for improvements are compared. Chapter 14 provides QoS requirements for satellite ATM networks , and a simulation model for satellite ATM Unspecified Bit Rate (UBR) service. Chapter 15 develops a simulation model for TCP over satellite ATM for GEO, MEO and Low Earth Orbit (LEO) configurations. An analytical model for satellite ATM based Time Division Multiple Access/Demand Assignment Multiple Access (TDMA /DAMA) slot allocation for Constant Bit Rate (CBR) services is presented in Chapter 16.
SATELLITE SYSTEMS FOR PERSONAL APPLICATIONS CONCEPTS AND TECHNOLOGY
The 'Wiley Series on Wireless Communications and Mobile Computing' is a series of comprehensive, practical and timely books on wireless communication and network systems. The series focuses on topics ranging from wireless communication and coding theory to wireless applications and pervasive computing. The books provide engineers and other technical professionals, researchers, educators and advanced students in these fields with invaluable insight into the latest developments and cutting-edge research Other titles in the series:
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Wireless Communications and Mobile Computing
Recently, the availability of innovative and affordable COTS (Commercial Off-The-Shelf) technological solutions and the ever-improving results of microelectronics and microsystems technologies have enabled the design of ever smaller yet ever more powerful satellites. The emergence of very capable small satellites heralds an era of new opportunities in the commercial space market. Initially applied only to scientific missions, Earth observation and remote sensing, small satellites are now being deployed to support telecommunications services. This review paper examines the operational features of small satellites that contribute to their success. An overview of recent advances and development trends in the field of small satellites is provided, with a special focus on telecommunication aspects such as the use of higher frequency bands, optical communications, new protocols, and advanced architectures.
NASA's broadband satellite networking research
IEEE Communications Magazine, 1999
he Space Program Office and Communication Technology Division of the NASA Glenn Research Center have been working with the United States satellite communication industry over the past 16 years to develop advanced communication and networking technologies to improve commercial satellite communications. With the recent explosion of the Internet and the enormous business opportunities available to communication system providers, great interest has developed in using commercial protocols over satellite networks. NASA Glenn has been addressing five major areas of concern regarding broadband satellite communications using commercial protocols: quality of service (QoS), interoperability, routing, traffic management, and protocol bandwidth efficiency.