NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Space Link Extension (SLE) Emulation for High-Throughput Network CommunicationAs the data rate requirements for space communications increases, significant stress is placed not only on the wireless satellite communication links, but also on the ground networks which forward data from end-users to remote ground stations. These wide area network (WAN) connections add delay and jitter to the end-to-end satellite communication link, effects which can have significant impacts on the wireless communication link. It is imperative that any ground communication protocol can react to these effects such that the ground 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 test the CCSDS SLE protocol implementations proposed for use on future NASA communication networks. Our results show that in the presence of realistic levels of network delay, high-throughput SLE communication links can experience significant 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 as well to the SLE implementation developers which, based on our reports, developed a new release for SLE which we show fixes the SLE blocking issue and greatly improves the protocol throughput. In this paper, we also discuss future developments for our end-to-end emulation lab and how these improvements can be used to develop and test future space communication technologies.
Document ID
20150000876
Document Type
Presentation
Authors
Murawski, Robert W. (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
January 30, 2015
Publication Date
August 4, 2014
Subject Category
Space Communications, Spacecraft Communications, Command and Tracking
Report/Patent Number
GRC-E-DAA-TN16867
Meeting Information
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

Available Downloads

NameType 20150000876.pdf STI

Related Records

IDRelationTitle20140017058See AlsoSpace Link Extension (SLE) Emulation for High-Throughput Network Communication