NS2

1
NS2

• Chih-Heng Ke (???)
• smallko_at_ee.ncku.edu.tw
• MSN smallko_at_hotmail.com

2
Outline1

• NS2 Installation
• cygwin installation
• ns2.26, ns2.27, ns2.28, ns2.29
• ns-2 802.11 support (ET/SNR/BER-based PHY models,
  802.11a multirate, 802.11e HCCA and EDCA)
• myNS2
• How to apply the patch
• New module insertion
• Recompilation
• Tools
• nsbench
• NS2 Scenarios Generator

3
Outline2

• Examples
• diffserv network
• ad hoc network
• wired-cmu-wireless
• Mobile IP
• How to measure the loss rate, delay, jitter,
  throughput?
• Parse the trace file
• modify the C code
• How to present the simulation result?
• gnuplot (xgraph, or Excel)
• confidence interval
• How to run the simulation in a batch mode?

4
Outline3

• How CBR works?
• How TrafficTrace works?
• How UDP works?
• How DCF works ?
• Trace the C code in NS2
• Multicast
• Unicast
• Propagation Model
• Transmission range
• Hidden Terminal Problem

5
Outline4

• How to dynamically set the link bandwidth during
  simulation?
• How to set the different operation modes (DCF or
  EDCF) for different mobile nodes?
• How to set the different transmission speeds to
  different mobile nodes?
• How to get the information in different layers?
• How to measure the queue length in the base
  station or mobile node?
• How to set the communication radius in wireless
  nodes?
• Making NS2 simulate an 802.11b link

6
Outline5

• wireless error model
• random uniform model
• GE model (burst pattern)
• Others
• DCF vs. EDCF
• Multimedia simulation
• myEvalvid (encoding from raw YUV video)
• myEvalvid-NT (for publicly available video
  traffic traces)
• Multiple Description Coding (MDC)