1 / 12

Workshop on the Emergence of Delay / Disruption-Tolerant Networks (E-DTN) 2009

Workshop on the Emergence of Delay / Disruption-Tolerant Networks (E-DTN) 2009 . A DTN Testbed Architecture. Efthymios Koutsogiannis Sotirios Diamantopoulos Vassilis Tsaoussidis. Department of Electrical and Computer Engineering Democritus University of Thrace, Xanthi, GREECE ComNet group.

monet
Télécharger la présentation

Workshop on the Emergence of Delay / Disruption-Tolerant Networks (E-DTN) 2009

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Workshop on the Emergence of Delay / Disruption-Tolerant Networks (E-DTN) 2009 A DTN Testbed Architecture • Efthymios Koutsogiannis • Sotirios Diamantopoulos • Vassilis Tsaoussidis Department of Electrical and Computer Engineering Democritus University of Thrace, Xanthi, GREECE ComNet group

  2. Towards a standard DTN architecture DTN is gaining momentum as the new space communication architecture Open Issues • Bundle Protocol is not a mature technology yet • It lacks several features such as routing and reliability • There are several proposed protocols to complement DTN functionality • The design and deployment of a DTN testbed becomes very significant, since it will allow for: • the evaluation of the existing space-oriented protocols • the design, implementation and evaluation of new protocols Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 2/12

  3. Testbed Design Goals • Dynamic control of network parameters • Emulation of fundamental network parameters (bandwidth, PER, connectivity availability) • Realistic and dynamic adaptation to parameter changes in real-time • Scalability • Efficient scaling over a large number of communication nodes • Transparency • Network emulation should be transparent to upper layer protocols and applications • Flexibility • Emulation of any desirable communication topology • Incorporation of new protocols, architectures, mechanisms • Interoperability with other DTN testbeds • Reusable infrastructure Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 3/12

  4. Architecture Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 4/12

  5. Architecture: Administrative Part • Graphical User Interface • Input of experiment parameters regarding: • Nodes (number, data production – consumption, storage size) • Links (bandwidth, error rate, propagation delay, availability) • Available protocols • Modification of parameters while the experiment is on progress • Real-time presentation of testbed statistics and status information • Kinematics Modeling System • Creation of the communication scenarios • Creation of the corresponding control data for the nodes • Central Management System • Handling of the communication between the various testbed components • Exchange of control data and status reports with the Emulation Nodes Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 5/12

  6. Architecture: Emulation Part • Emulation Nodes • Control Daemon • sets node parameters • generates status reports • communicates with Central Management System through the Control Plane • Node Protocol Stack • Protocol stack under evaluation • Individual PCs communicate through the Data plane, exchanging files • such as images, measurements, etc. Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 6/12

  7. Testbed Topology • Ten Emulation Nodes • Suitable for complex space communication scenarios • Intercontinental Link with MIT - Boston • Suitable for terrestrial scenarios • Geostationary Link (HellasSat Geo Satellite) • Suitable for low-orbit scenarios Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 7/12

  8. Protocol Stack • DTN Implementation: Interplanetary Overlay Network (ION) • Bundle Protocol • Asynchronous Message Service (AMS) • Licklider Transmission Protocol (LTP) • Contact Graph Routing (CGR) • Interoperates with DTN2 • An advanced application layer protocol is • required • CCSDS File Delivery Protocol (CFDP) • Automatic, reliable file transfer • File segmentation • Remote file management and directory listing • Lacks dynamic routing support Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 8/12

  9. Progress so far • Integration of CFDP into ION protocol stack • Performance evaluation of CFDP over ION versus CFDP as a stand alone application • Integration of CCSDS Space Packet protocol • Implementation of the protocol’s basic functionality • Evaluation of several DTN routing protocols • Comparison of Contact Graph Routing (CGR) with Probabilistic Routing Protocol using a History of Encounters and Transitivity (PRoPHET) and Flood routing • Design of efficient space oriented DTN transport • protocols • DS-TP • DTTP Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 9/12

  10. Future Work • Integration of our DTN testbed with international DTN • network (DTN-Bone) • Design and implementation of an efficient DTN routing • scheme, using parameters such as • Resource availability • Custody requirements • Foreign agency assets exploitation • Implementation of an advanced Kinematics module • Dynamic adjustment of link characteristics, based on real planet and satellite trajectories, random solar storms etc. Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 10/12

  11. Summary • State-of-the-art DTN testbed deployment • Emulation of present and future Space communications scenarios • Evaluation of the existing DTN architecture • Evaluation and deployment of new protocols • Exploitation of Satellite and Intercontinental links Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 11/12

  12. End of Presentation Thank you Questions… Workshop on the Emergence of Delay/Disruption-Tolerrant Networks (E-DTN) 2009 ComNet group 12/12

More Related