AuthorGrebe, David L.
AffiliationApogee Labs, Inc.
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Internet Protocol (IP)
MetadataShow full item record
RightsCopyright © International Foundation for Telemetering
Collection InformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
AbstractThe advent of COTS based network-centric data systems brings a whole new vocabulary into the realm of instrumentation. The Communications and computer industries have developed networks to a high level and they continue to evolve. One of the basic techniques that has proven itself useful with this technology is the use of a “layered architecture.” This paper is an attempt to discuss the basic ideas behind this concept and to give some understanding of the vocabulary that has grown up with it.
SponsorsInternational Foundation for Telemetering
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MOTION VECTOR ROUTING PROTOCOL: A POSITION BASED ROUTING PROTOCOL FOR MOBILE AD HOC NETWORKSMcNeill, Kevin M.; Zhao, Yun; McNeill, Kevin M.; Zeigler, Bernard P.; Talarico, Claudio (The University of Arizona., 2005)A Mobile Ad Hoc Network (MANET) consists of mobile nodes, equipped with wireless communications devices, which form a communications network without fixed network infrastructure or topology. The MANET is typically characterized by: limited bandwidth; limited radio range; high mobility; and susceptibility to impairments that degrade the signal to noise ratio and bit error rates. These characteristics pose challenges to the MANET routing protocols. In addition to these characteristics, we have found that the mobility pattern of the nodes also has significant impact on the MANET routing protocols. In order to achieve improved efficiency for these networks, we propose the Motion Vector Routing (MoVeR) protocol. MoVeR is a position based routing protocol for MANET communications that uses the motion information of mobile nodes to determine how to route the packets. MoVeR predicts the future positions of mobile nodes, based on motion vectors containing current and previous position, and velocity information. The protocol is designed for applications in which we expect that nodes will have access to a position service. We also assume the availability of a location service by which the sender can obtain an initial estimate of the location of the destination. Nodes using the MoVeR protocol distribute the routing information to neighbors in one-hop transmission range. Given the position information, MoVeR can potentially employ one of several forwarding strategies. The implementation used for this research employs a greedy algorithm forwarding the packet to the neighbor such that the neighbor is closer to the destination in the near future. Since the forwarding strategy could be subject to local minima problems, the algorithm also includes a recovery mode which is activated when this problem has occurred. In the recovery mode, the protocol traverses the planarized graph to the destination. MoVeR is a localized routing protocol and therefore exhibits reduced control overhead compared to protocols which maintain a global topology. The mobility prediction capability of MoVeR improves routing performance in several types of sophisticated mobility scenarios. We describe the MoVeR protocol algorithm, implementation, and simulation results show that MoVeR gives improved performance compared to Greedy Perimeter Stateless Routing and Dynamic Source Routing.
TESTING OF A DTN PROTOCOL - CCSDS FILE DELIVERY PROTOCOL INTER-IMPLEMENTATION TESTING FINAL REPORTCarper, Richard D.; Ciccone, Massimiliano; Rockwell, Kathy Bryan; Space Data Systems; European Space Agency; California Institute of Technology (International Foundation for Telemetering, 2004-10)The CCSDS has developed the “CCSDS File Delivery Protocol” (CFDP), as a disruption/delay tolerant file transfer protocol. CFDP allows an automatic, reliable file transfer between spacecraft and ground (in both directions) designed to support the operation of spacecraft by means of file transfer and remote file system management. To support the development and fielding of the protocol in an international and cross-supporting environment, an international, inter-operability test program has been developed and successfully executed. First phase testing involved five independent implementations of the Core Procedures of the protocol. The second phase tests involve multi-hop transferring of files using the Extended Procedures. The third phase involves the testing of the SFO Procedures. The latter two phases involved two independent protocol implementations, namely, those of ESA and JPL. This paper constitutes a final report on the process of testing, the test results, the experience gained, and the resulting plans to extend this methodology to other areas within the CCSDS.
Optimized-Eight-State CV-QKD Protocol Outperforming Gaussian Modulation Based ProtocolsDjordjevic, Ivan B.; Univ Arizona, Dept Elect & Comp Engn (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2019-08)In this paper, an optimized-eight-state CV-QKD protocol is proposed significantly outperforming previously introduced discrete modulation (DM) protocols as well as the corresponding Gaussian modulation (GM)-based CV-QKD protocols for practical reconciliation efficiencies values in terms of both secret-key rate (SKR) and achievable distance. The proposed CV-QKD protocol also outperforms, in terms of SKR, the corresponding high-cost single-photon DV-QKD scheme, employing an array of multiplexed single-photon detectors, for several orders of magnitude. We also describe a generalized RF-assisted CV-QKD scheme with heterodyne detection applicable to arbitrary DM scheme, insensitive to the laser phase noise and frequency offset fluctuations.