Query about Ns3 Ascii Trace format

[Moyukh Laha]

Hello friends,
                 I have query about ns3 ascii trace format. Is there any documentation for that? For example::

t 0.0126058 /NodeList/3/DeviceList/0/$ns3::WifiNetDevice/Phy/State/Tx ns3::WifiMacHeader (DATA ToDS=0, FromDS=0, MoreFrag=0, Retry=0, MoreData=0 Duration/ID=0us, DA=ff:ff:ff:ff:ff:ff, SA=00:00:00:00:00:04, BSSID=ff:ff:ff:ff:ff:ff, FragNumber=0, SeqNumber=0) ns3::LlcSnapHeader (type 0x800) ns3::Ipv4Header (tos 0x0 DSCP Default ECN Not-ECT ttl 64 id 0 protocol 17 offset (bytes) 0 flags [none] length: 48 10.1.1.4 > 10.1.1.255) ns3::UdpHeader (length: 28 698 > 698) ns3::olsr::PacketHeader () ns3::olsr::MessageHeader () ns3::WifiMacTrailer ()


Here the first event is 't'. Now I know about '+','-','d','r' but what is this 't' event mean?
Any proper documentation for all these events and all?
Thanks.

[Tommaso Pecorella]

Hi,

"t" stands for Transmission.

However, mind that ASCII trace is not really consistently used in ns-3 (e.g., some devices don't output drops there).

In ns-3 you should look at the PCAP traces or at the results of Trace in the code.

T.

[Moyukh Laha]

       Thanks Tommaso. However its not clear to me what is exactly meant by 'transmission'? Is it like data forwarding? For example I used wifi-adhoc scenario and only a few nodes are generating packets. However I find all of the trace file is full of 't' [ I was running wifi-simple-adhoc-grid.cc example].

        Also, last line is not clear to me. PCAP is alright but what do you mean by "results of Trace in the code"?

Thanks.

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[Tommaso Pecorella]

Yes, transmission by ANY node, even those forwarding a packet.

About traces... https://www.nsnam.org/docs/manual/html/tracing.html

T.

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[Moyukh Laha]

Thanks Tommaso.

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