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Analysis of Aeronautical Gateway Protocol. Curtis Kelsey University of Missouri. Overview. Introduction Method Experiment Results Conclusion Summary. Introduction. Aeronautical Networks are unique Mixture of static & dynamic nodes Extremely high speed nodes

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analysis of aeronautical gateway protocol

Analysis of Aeronautical Gateway Protocol

Curtis Kelsey

University of Missouri

overview
Overview
  • Introduction
  • Method
  • Experiment
  • Results
  • Conclusion
  • Summary
introduction
Introduction
  • Aeronautical Networks are unique
  • Mixture of static & dynamic nodes
  • Extremely high speed nodes
  • Custom network stack is necessary

Dynamic airborne environment

introduction1
Introduction
  • ANTP
    • AeroTP (TCP)
    • AeroNP (IP)
    • AeroRP (Routing)
    • AeroGW*
  • AeroGW Converts
    • TCP  AeroTP
    • IP  AeroNP
    • Link/MAC  iNET MAC
    • PHY  iNET PHY
introduction2
Introduction
  • 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
method
Method
  • 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
ns3 setup
ns3 Setup
  • http://www.nsnam.org/wiki/index.php/Installation
  • Virtualbox or Hyper-V
  • Requirements
    • Gcc/g++ > 3.4
    • Python
    • Mercurial
    • Bazaar
    • Etc…
  • Downloading
    • clone http://code.nsnam.org/ns-3-allinone
    • wgethttp://www.nsnam.org/release/ns-allinone-3.13.tar.bz2
ns3 setup1
ns3 Setup
  • 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>
experiment model
Experiment Model
  • 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
experiment model1
Experiment Model
  • 1 Destination Internet Node (Wired)
    • 100Mbps
    • 1/10/100/1000ms delay
  • Traffic
    • 100-1kb packets/10 seconds
    • UDP
  • Zone
    • 1000 x 1000 area
experiment construction
Experiment Construction
  • PointToPointHelper
    • Handles Wired/Wireless Bridge
  • CsmaHelper
    • Handles wired nodes
  • WifiHelper
    • Handles wireless nodes
  • MobilityHelper
    • Handles AN and RN Mobility
experiment construction1
Experiment Construction
  • Packet capture enabled
    • AP
    • Csma (Wired)
    • Wireless Nodes
results
Results
  • Simulation ran for
    • 1ms additional delay
    • 10ms additional delay
    • 100ms additional delay
    • 1000ms additional delay
  • At Wireless Network Edge
results1
Results
  • 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)
results 3
Results 3
  • How many of the 100 packets got delivered?

Wired Node

Wireless Nodes

results2
Results
  • 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
conclusion
Conclusion
  • 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
references
References
  • (Primary Paper) E. K. ¸Cetinkaya and J. P. G. Sterbenz. Aeronautical Gateways: Supporting TCP/IP-based 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&CFTOKEN=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.
summary
Summary
  • Introduction
  • ns3 setup
  • Experiment Construction
  • Results
  • Conclusion
  • Summary
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