latest status: run 802.11, some knowledge on trace file analysis. TODO: Trace file: which nodes send to which nodes Static routing settings, look for dynamic routing Adjust transmission power statically by distance 4/3/2013 PacketsResponse Time Reporter (RTR). RTR probe RTR responder The RTR probe sends a burst of packets to the RTR responder. The RTR
responder turns them around and sends them back to the probe. This simple
operation allows the probe to measure packet loss and round trip delay. To
measure jitter, the probe sends a control packet to the responder before it
initiates the packet burst. The control packet informs the responder how many
milliseconds (ms) to expect between each packet in the burst. The responder
then measures the inter-packet delay during the burst, and any deviation from
the expect interval is recorded as jitter. FAQIn wireless mode, the default transmission range for a node is supposed to be 250 meters. So why distCST_ is set to 550 meters by default? 550m is called carrier sense range. Whenever two nodes are within that range, the interference is there and simultaneous transmission is disallowed. Nodes outside the transmission range but within the sensing range can hear the transmission of the transmitting node. However, the S/N (Signal/Noise) ratio is too low to decode the signal correctly. In this case, even though the receving nodes do not know the contents of the transmission, they still know that the medium is not idle. Other InfoTo install ns2 in ubuntu:$ sudo apt-get install ns2 $ sudo apt-get install nam $ sudo apt-get install xgraph To run .tcl files $ ns simple100.tcl if the tcl files contains nam settings, nam will automatically start. http://books.google.com/books?id=_VkTzFLnwD4C&pg=PA222&lpg=PA222&dq=ns2+null&source=bl&ots=_Z17pg1uon&sig=lVGQYMfgNdjR3xTx_BwQ1xgfHjE&hl=en&sa=X&ei=ZdD9UO-fDIO89gSgu4DICg&ved=0CEEQ6AEwAw#v=onepage&q=ns2%20null&f=false null agent means the receiver Examples http://nile.wpi.edu/NS/ http://lovefei.com/?p=88 http://www.winlab.rutgers.edu/~zhibinwu/html/NS_examp.html#a%20simple%20test http://www.isi.edu/nsnam/ns/tutorial/ |
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