Internet of Satellites (IoSat): analysis of network models and routing protocol requirements

The space segment has been evolved from monolithic to distributed satellite systems. One of these distributed systems is called the federated satellite system (FSS) which aims at establishing a win-win collaboration between satellites to improve their mission performance by using the unused on-board resources. The FSS concept requires sporadic and direct communications between satellites, using inter satellite links. However, this point-to-point communication is temporal and thus it can break existent federations. Therefore, the conception of a multi-hop scenario needs to be addressed. This is the goal of the Internet of satellites (IoSat) paradigm which, as opposed to a common backbone, proposes the creation of a network using a peer-to-peer architecture. In particular, the same satellites take part of the network by establishing intermediate collaborations to deploy a FSS. This paradigm supposes a major challenge in terms of network definition and routing protocol. Therefore, this paper not only details the IoSat paradigm, but it also analyses the different satellite network models. Furthermore, it evaluates the routing protocol candidates that could be used to implement the IoSat paradigm.Peer ReviewedPostprint (author's final draft

SatCom Today in Canada: Significant Research: Broadband Satellite Communications List of CITR related Publications (1998-2003)

Journal Papers Conference Papers Contributions to Standards Canadian Space Agency Recent Publication

REFWA: An Efficient and Fair Congestion Control Scheme for LEO Satellite Networks

科研費報告書収録論文(課題番号:17500030/研究代表者:加藤寧/インターネットと高親和性を有する次世代低軌道衛星ネットワークに関する基盤研究

Internet of Satellites (IoSat): an interconnected space paradigm

During the last years the space has been populated by Distributed Satellite Systems, which some of them have started to implement Inter-Satellite Communication. However, current solutions are composed of a unique mission and homogeneous spacecrafts or a combination of them. This actually limits their use in the so-called “Federated Satellite Systems” that proposes the interconnection of heterogeneous spacecrafts in order to establish a mission collaboration whenever the resources are not used for the primary mission goal. This point-to-point proposal has some limitations that can be addressed in a multi-hop platform, i.e. a network. Current satellite network proposals, such as Space Internet or Heterogeneous Spacecraft Network, propose the creation of a common network backbone which provides connectivity for future missions. However, this approach supposes huge maintenance and deployment costs. This work presents a new interconnected space paradigm based on a more peer-to-peer architecture: Internet of Satellites. This new paradigm promotes the creation of sporadic networks, called Inter Satellite Networks, which provide the required communication means to deploy Federated Satellite Systems for multi-hop cases.Peer ReviewedPostprint (published version

Modellierung und Evaluierung der “Required Communication Performance” von Luft-Boden Datenverbindungen mit “Erasure Codes”.

In this work, a model to calculate the air-ground data link performance using the “Required Communication Performance” metric used in aviation is proposed. This model is applied to evaluate the performance of data links and to estimate the minimum link performance required to meet the safety requirements. The results show that it is highly unlikely that air-ground data links achieve the minimum performance. “Erasure codes” and a multiple link concept are proposed and evaluated to improve the performance of the links.Diese Arbeit beschreibt ein Modell, mit welcher die Leistung von Luft-Boden Datenverbindungen unter Verwendung der in der Luftfahrt verwendeten Metrik „Required Communication Performance“, berechnet werden. Dieses Modell wird angewendet, um die Leistung von Datenverbindungen zu bewerten und die minimale Verbindungsleistung abzuschätzen, die erforderlich ist, um die Sicherheitsanforderungen zu erfüllen. Die Ergebnisse zeigen, dass es sehr unwahrscheinlich ist, dass Luft-Boden Datenverbindungen die Mindestleistung erreichen. Zur Verbesserung der Leistung der Links werden Konzepte basierend auf “Erasure Codes" und mehreren Links vorgeschlagen und evaluiert

Satellite Networks: Architectures, Applications, and Technologies

Since global satellite networks are moving to the forefront in enhancing the national and global information infrastructures due to communication satellites' unique networking characteristics, a workshop was organized to assess the progress made to date and chart the future. This workshop provided the forum to assess the current state-of-the-art, identify key issues, and highlight the emerging trends in the next-generation architectures, data protocol development, communication interoperability, and applications. Presentations on overview, state-of-the-art in research, development, deployment and applications and future trends on satellite networks are assembled