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Space Link Extension (SLE) Emulation for High-Throughput Network CommunicationAs the data rate requirements for space communications increases, signicant stressis placed not only on the wireless satellite communication links, but also on the groundnetworks which forward data from end-users to remote ground stations. These wide areanetwork (WAN) connections add delay and jitter to the end-to-end satellite communicationlink, eects which can have signicant impacts on the wireless communication link. It isimperative that any ground communication protocol can react to these eects such that theground network does not become a bottleneck in the communication path to the satellite.In this paper, we present our SCENIC Emulation Lab testbed which was developed to testthe CCSDS SLE protocol implementations proposed for use on future NASA communica-tion networks. Our results show that in the presence of realistic levels of network delay,high-throughput SLE communication links can experience signicant data rate throttling.Based on our observations, we present some insight into why this data throttling happens,and trace the probable issue back to non-optimal blocking communication which is sup-ported by the CCSDS SLE API recommended practices. These issues were presented aswell to the SLE implementation developers which, based on our reports, developed a newrelease for SLE which we show xes the SLE blocking issue and greatly improves the pro-tocol throughput. In this paper, we also discuss future developments for our end-to-endemulation lab and how these improvements can be used to develop and test future spacecommunication technologies.
Document ID
20140017058
Document Type
Conference Paper
Authors
Murawski, Robert (Vantage Partners, LLC Brook Park, OH, United States)
Tchorowski, Nicole (Ohio State Univ. Columbus, OH, United States)
Golden, Bert (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
December 8, 2014
Publication Date
August 4, 2014
Subject Category
Space Communications, Spacecraft Communications, Command and Tracking
Report/Patent Number
GRC-E-DAA-TN16223
Meeting Information
AIAA Space 2014(San Diego, CA)
Funding Number(s)
CONTRACT_GRANT: NNC12BA01B
WBS: WBS 439432.07.01.03.01
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Networking

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