ns-3 Premier

1
ns-3 Premier

• Egemen Çetinkaya
• Department of Electrical Engineering Computer
  Science
• The University of Kansas
• ecetin01_at_ittc.ku.edu
• http//wiki.ittc.ku.edu/resilinets_wiki/index.php/
  Main_Page

2
Outline

• Introduction
• General comparison of ns-2 vs. ns-3
• Model comparison of ns-2 vs. ns-3
• References, links, documents

3
Introduction1

• ns-3 is a discrete event network simulator for
  Internet systems
• Targeted for research education
• Community-oriented open source development
• Free and open source software
• Emphasis on layers 2-4 of the network stack
• Integration of open source tools/software and
  capability to simulate and emulate (e.g. tcpdump,
  Ethereal packet analysis)?

4
Introduction2

• Can be installed on any platform e.g. desktop,
  server, on 32 or 64 bit architectures
• So far experience shows that installations are
  very easy (Ubuntu LTS, Fedora 9, Cygwin)?
• Installed latest release of ns-3, ns-3.2 to ITTC
  machines (lutetium and freestyle)?
• Planned to reuse many models in ns-2
• ns-3 is not backward compatible, ns-2 scripts
  cannot be run in ns-3

5
Introduction3

• Customizable trace files
• ns-3 development so far focuses on the core
  feature development rather than the models
• No support for visualization yet, but saw bunch
  of threads on the subject
• Python bindings for ns-3 is a work in progress,
  and some limitations are know by developers
• http//www.nsnam.org/wiki/index.php/NS-3_Python_Bi
  ndings

6
Introduction4

• Roadmap can be found on the following link -
  http//www.nsnam.org/wiki/index.php/Roadmap
• Releases are date driven, instead of feature or
  bug driven
• There are already papers being published -
  http//www.nsnam.org/wiki/index.php/Papers

7
ns-2 vs. ns-3 Comparison1

• First release 1996 vs. 2008
• Based on ns-1 REAL simulator vs. ns-2, GTNets,
  YANS
• Architecture OTcl C vs. C optional
  Phyton scripting
• Funded by DARPA VINT,SAMAN NSF CONSER vs. NSF
  CISE INRIA
• Current support Volunteers, USC ISI
  Sourceforge vs. NSF, INRIA, GT, WashU
  volunteers

8
ns-2 vs. ns-3 Comparison2

• Scripting OTcl vs. Python
• Visualization nam vs. ns3-viz, pyviz, nam,
  iNSpect ? (all under development)?
• Scalability sequential simulations vs.
  distributed simulations

9
Model Comparison ns-2 vs. ns-3Application and
Transport

• Ping, vat, telnet, FTP, multicast, FTP,
  probabilistic and trace-driven traffic gen.,
  webcache
• TCP, UDP, SCTP, XCP, TFRC, RAP, RTP, Multicast
  PGM, SRM, RLM, PLM

• Sockets-like API, P2P, traffic generator
• TCP stack emulation (Linux,BSD), DDCP, additional
  high speed TCP variants, UDP

10
Model Comparison ns-2 vs. ns-3Network

• Unicast IP, MIP, DV, LS, IPinIP, SR, Multicast
  SRM,
• MANET AODV, DSR, DSDV, TORA, IMEP,
• Queuing DiffServ, RED, WFQ, DropTail

• full IPv4 IPv6 support, NAT, BGP, OSPF, RIP,
  IS-IS, PIM-SM, IGMP/MLD, static (Dijkstra)
  unicast, static multicast
• MANET OLSR

11
Model Comparison ns-2 vs. ns-3Link and MAC

• ARP, HDLC, GAF, MPLS, LDP
• MAC CSMA, 802.11b, 802.15.4, satellite Aloha

• new 802.11 model, 802.11 variants (mesh, QoS),
  802.16, TDMA, CDMA, GPRS, CSMA

12
Model Comparison ns-2 vs. ns-3 Physical and
Mobility

• TwoWay,shadowing,Omni Antennas,Energy model
  Satellite repeater
• Many including bonn-motion tool

• IEEE 802 physical layers, Rayleigh and Rician
  fading channels, GSM, Jakes composite loss model,
  Friis, log-distance
• Hierarchical, Random direction, RWP, RW, ns-2
  Scen-Gen

13
References

• ns-3 main page for documents, news etc.
• http//www.nsnam.org/
• ns-3 wiki page roadmap, howtos, etc.
• http//www.nsnam.org/wiki/index.php/Main_Page
• ns-3 users group
• http//groups.google.com/group/ns-3-users
• Thomas R. Henderson, Sumit Roy, Sally Floyd,
  George F. Riley, ns-3 project goals, ACM,
  Proceeding from the 2006 workshop on ns-2 the IP
  network, Pisa, Italy, 2006