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The Impact of Traffic Prioritization on Deep Space Network Mission TrafficA select number of missions supported by NASA's Deep Space Network (DSN) are demanding very high data rates. For example, the Kepler Mission was launched March 7, 2009 and at that time required the highest data rate of any NASA mission, with maximum rates of 4.33 Mb/s being provided via Ka band downlinks. The James Webb Space Telescope will require a maximum 28 Mb/s science downlink data rate also using Ka band links; as of this writing the launch is scheduled for a June 2014 launch. The Lunar Reconnaissance Orbiter, launched June 18, 2009, has demonstrated data rates at 100 Mb/s at lunar-Earth distances using NASA's Near Earth Network (NEN) and K-band. As further advances are made in high data rate space telecommunications, particularly with emerging optical systems, it is expected that large surges in demand on the supporting ground systems will ensue. A performance analysis of the impact of high variance in demand has been conducted using our Multi-mission Advanced Communications Hybrid Environment for Test and Evaluation (MACHETE) simulation tool. A comparison is made regarding the incorporation of Quality of Service (QoS) mechanisms and the resulting ground-to-ground Wide Area Network (WAN) bandwidth necessary to meet latency requirements across different user missions. It is shown that substantial reduction in WAN bandwidth may be realized through QoS techniques when low data rate users with low-latency needs are mixed with high data rate users having delay-tolerant traffic.
Document ID
20110023687
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Jennings, Esther
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Segui, John
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gao, Jay
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Clare, Loren
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Abraham, Douglas
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
March 9, 2011
Publication Information
ISBN: 978-1-4244-7351-9/11
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
IEEEAC Paper 1714
Meeting Information
Meeting: 2011 IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 9, 2011
End Date: March 12, 2011
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Other
Keywords
prioritization
Deep Space Network
ground network
traffic

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