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DieselNet traces consisting of Bus-Bus and Bus-AP interactions
10/22/2007-11/16/2007
http://prisms.cs.umass.edu/diesel/
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This set of DieselNet traces where compiled during Fall 2007 from busses running routes serviced by Umass Transit.
Umass Transit's 40 busses were equipped with DieselNet equipment and a certain portion of those operated daily as dictated by bus failures and maintenance. Each bus scans for connection with other buses or access points (APs) on the road, and when found, connects to the bus or the AP.

This trace contains connection events between busses as well as between a bus and an AP.
All connection events occurring during a day are stored in the log file matching that date (year-month-date). Time stamps are recorded as absolute minutes and seconds after midnight. There are two files with the same name under two different directories called bus-bus and bus-ap. The bus-bus directory contains trace logs of bus connections, while the bus-ap directory contains trace logs of a bus-AP connections. 

Bus-AP
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We made sure to log only interactions with open APs, by pinging a well known server using the open AP connection. We do not send data during the open AP connection and use periodic ping messages to estimate the total length of the connection. The connection length excludes time taken for association and getting a DHCP address.

As example entry in the log is 
3204 00:12:17:c5:71:72 0:0:1 null 5.182 72.5552333333 42.2817516667

The first column is the bus ID, the second column in the MAC address of the AP, the third column is the time. The fourth column is always null and is for consistency with the bus-bus traces. The fifth column is the total duration of meeting in seconds. The last two columns are the longitude and latitude respectively.

Bus-Bus
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Each bus are identified by an ID.  In the following entry, bus 3030 sent bus 3203 at 0:27:22 transferring  2297600 bytes. The connection lasted for 33 seconds and the latitude and longitude of meeting is 72.53267 and 42.39381 respectively. Entries where the first or second column is "null" should be ignored.

3030 3203 0:27:22 2297600 33 72.53396 42.3946283333

If you use these traces in a research paper, please reference the traces as 

Aruna Balasubramanianm Brian Neil Levine and Arun Venkataramani,
"Enabling Interactive Applications for Hybrid Networks" 
in Proceedings of ACM Mobicom, September 2008

@InProceedings{Thedu-mobicom08,
  author = 	 {Aruna Balasubramanianm Brian Neil Levine and Arun Venkataramani},
  title = 	 {{Enabling Interactive Applications for Hybrid Networks}},
  booktitle = 	 {Proc. ACM Mobicom},
  year =	 2008,
  month =	 {September}
}