Download - Analysis of Aeronautical Gateway Protocol
Analysis of Aeronautical Gateway ProtocolCurtis KelseyUniversity of Missouri
Overview• Introduction• Method• Experiment• Results• Conclusion• Summary
Introduction• Aeronautical Networks
are unique• Mixture of static &
dynamic nodes• Extremely high speed
nodes• Custom network stack
is necessaryDynamic airborne environment
Introduction• ANTP• AeroTP (TCP)• AeroNP (IP)• AeroRP (Routing)• AeroGW*
• AeroGW Converts• TCP AeroTP• IP AeroNP• Link/MAC iNET MAC• PHY iNET PHY
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• 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• 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• wget http://www.nsnam.org/release/ns-allinone-3.13.tar.bz2
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• 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 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
• PointToPointHelper• Handles Wired/Wireless Bridge
• CsmaHelper• Handles wired nodes
• WifiHelper• Handles wireless nodes
• MobilityHelper • Handles AN and RN Mobility
Experiment Construction
• Packet capture enabled• AP• Csma (Wired)•Wireless Nodes
Results • Simulation ran for • 1ms additional delay• 10ms additional delay• 100ms additional delay• 1000ms additional delay
• At Wireless Network Edge
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• How many of the 100
packets got delivered?
Wired Node
Wireless Nodes
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• 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• (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• Introduction• ns3 setup• Experiment Construction• Results• Conclusion• Summary
Questions?