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Curtis Kelsey
University of Missouri
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Introduction
Method
Experiment
Results
Conclusion
Summary
• Aeronautical Networks are
unique
• Mixture of static & dynamic
nodes
• Extremely high speed nodes
• Custom network stack is
necessary
Dynamic airborne environment
• ANTP
• AeroTP (TCP)
• AeroNP (IP)
• AeroRP (Routing)
• AeroGW*
• AeroGW Converts
• TCP  AeroTP
• IP  AeroNP
• Link/MAC  iNET MAC
• PHY  iNET PHY
• Conversions Occur:
• Ground Stations
• Aeronautical Nodes
• Possible Overhead Implications
• Less data transferred
• Communication windows lost
• Most Significant Delay
• Egress conversion from MAC to IP (Similar to ARP)
• Egress is not constrained by time due to node movement
• Does delay caused by the conversion process result in
excessive data loss?
• Implementation of entire suite beyond the scope of
one semester
• Implement a network simulation
• Use additional delay as control variable
• Analyze data delivery
• http://www.nsnam.org/wiki/index.php/Installation
• Virtualbox or Hyper-V
• Requirements
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Gcc/g++ > 3.4
Python
Mercurial
Bazaar
Etc…
• Downloading
• clone http://code.nsnam.org/ns-3-allinone
• wget http://www.nsnam.org/release/ns-allinone-3.13.tar.bz2
• Build
• ./build.py –enable-examples –enable-tests
• Configure
• ./waf -d debug --enable-examples --enable-tests configure
• Test
• ./test.py –c core
• Run a Project
• ./waf –run <my_project>
• 10 Airborne Nodes/Routing Nodes (Wireless)
• Random Walk
• Random Speed
• 5 Ground Stations (Access Point)
• Random Location
• GS to Internet Direct Link
• 100Mbps
• 2ms delay
• 1 Destination Internet Node (Wired)
• 100Mbps
• 1/10/100/1000ms delay
• Traffic
• 100-1kb packets/10 seconds
• UDP
• Zone
• 1000 x 1000 area
• PointToPointHelper
• Handles Wired/Wireless Bridge
• CsmaHelper
• Handles wired nodes
• WifiHelper
• Handles wireless nodes
• MobilityHelper
• Handles AN and RN Mobility
• Packet capture enabled
• AP
• Csma (Wired)
• Wireless Nodes
• Simulation ran for
• 1ms additional delay
• 10ms additional delay
• 100ms additional delay
• 1000ms additional delay
• At Wireless Network Edge
• Packets captured at
• Wireless AP (Ground Station)
• Wired Node
• Pcap file processed with Tcpdump & sent to log files
• Tcpdump –nn –tt –r (pcap file) > (log file)
• How many of the 100
packets got delivered?
Wired Node
Wireless Nodes
• 1ms
• 100% packet delivery
• No delay between transmit/receive
• 10ms
• 100% packet delivery
• No delay between transmit/receive
• 100ms
• 100% packet delivery
• No delay between transmit/receive
• 1000ms
• 100% packet delivery
• No delay between transmit/receive
• Delay implemented on wired node does not affect
traffic across point to point link
• Move delay variable to p2p link
• Random walk & speed for wireless nodes is not
causing dropped packets
• Expand zone & define a high velocity
• Amount of data transferred needs to be increased
• Illustrates dropped connections
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(Primary Paper) E. K. ¸Cetinkaya and J. P. G. Sterbenz. Aeronautical Gateways: Supporting TCP/IPbased Devices and Applications over Modern Telemetry Networks. In Proceedings of the International
Telemetering Conference (ITC), Las Vegas, NV, October 2009.
Cetinkaya, E., & Rohrer, J. (2012). Protocols for highly-dynamic airborne networks. Proceedings of the
18th annual international conference on Mobile computing and networking, 411–413. Retrieved from
http://dl.acm.org/citation.cfm?id=2348597
Narra, H., Cetinkaya, E., & Sterbenz, J. (2012). Performance analysis of AeroRP with ground station
advertisements. Proceedings of the first ACM …, 43–47. Retrieved from
http://dl.acm.org/ft_gateway.cfm?id=2248337&ftid=1233995&dwn=1&CFID=118936837&CFTO
KEN=41922410
Sterbenz, J., Pathapati, K., Nguyen, T., & Rohrer, J. (2011). Performance Analysis of the AeroTP
Transport Protocol for Highly-Dynamic Airborne Telemetry Networks. Retrieved from
http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA544743
J. P. Rohrer, E. Perrins, and J. P. G. Sterbenz. End-to-end disruption-tolerant transport protocol issues
and design for airborne telemetry networks. In Proceedings of the International Telemetering
Conference (ITC), San Diego, CA, October 2008
A. Jabbar, E. Perrins, and J. P. G. Sterbenz. A cross-layered protocol architecture for highly-dynamic
multihop airborne telemetry networks. In Proceedings of the International Telemetering Conference
(ITC), San Diego, CA, October 2008.
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Introduction
ns3 setup
Experiment Construction
Results
Conclusion
Summary