[Dataset] cu/cu_wart (v. 2011-10-24)

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the initial version

@MISC{cu-cu_wart-2011-10-24,
  author = {Caleb Phillips and Eric W. Anderson},
  title = {{CRAWDAD} data set cu/cu_wart (v. 2011-10-24)}, 
  howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/cu/cu_wart},
  month = oct,  
  year = 2011
}
					

This data was collected by Caleb Phillips at the University of Colorado (CU). 
It contains RSS measurements (together with GPS data) collected using the CU 
Wide Area Radio Testbed (CU-WART), which involves seven 802.11 APs with phased
array antennas mounted on university buildings.

If you use this data, please cite it using the appropriate CRAWDAD link. And, 
if you have cool results, or a technical question, let know to: 
caleb.phillips@colorado.edu.

The dataset was collected from the University of Colorado Wide-Area Radio
Testbed (WART) using a mobile node (a Samsung brand ``netbook'') with a pair 
of diversity antennas that collected data from 6 rooftop WART nodes.

WART consists of 8 phased array antenna nodes (7 of them operational) mounted 
to the rooftops of Colorado University and spans an area of 1.8 x 1.4 
kilometers. The entire testbed is linked together via wired Ethernet and can 
be controlled from a single administration point.

The mobile node was configured to transmit and log beacon packets from WART. 
The mobile node was additionally instrumented with a USB GPS receiver that was
used both to keep a log of position and to synchronize the system clock so 
that the wireless trace was in sync with the GPS position log. During the 
experiment, the mobile node was attached to an elevated (nonconducting) 
platform on the front of a bicycle. The bicycle was pedaled around the CU 
campus on pedestrian paths, streets, and in parking lots.

Because it contains identifiers for only research hardware, this data has not 
been anonymized in any way.

The commodity radios do exhibit a certain amount of error in RSS measurements.
After calibration, we found that any reasonable confidence level can be 
achieved by taking a practical number of samples.

[Traceset] cu/cu_wart/2010 (v. 2011-10-24)

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the initial version.

@MISC{cu-cu_wart-2010-2011-10-24,
  author = {Caleb Phillips and Eric W. Anderson},
  title = {{CRAWDAD} trace set cu/cu_wart/2010 (v. 2011-10-24)}, 
  howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/cu/cu_wart/2010},
  month = oct,  
  year = 2011
}
					

This data was collected by Caleb Phillips for the purpose of path loss modeling
work at the University of Colorado (CU) in 2010. It contains RSS measurements
(together with GPS data) collected using the CU Wide Area Radio Testbed 
(CU-WART), which involves seven 802.11 APs with phased array antennas mounted 
on university buildings.

This data was collected using a mobile node (a Samsung brand "netbook") with a
pair of diversity antennas. In this experiment, the 6 rooftop CU WART nodes 
were configured to transmit 80 byte "beacon" packets every 0.5 + U(0.0,0.5) 
seconds, where U(X,Y) is a uniformly distributed random number between X and 
Y. Beacons are configured to transmit at 1 Mbps, so that possible effects of 
Doppler spread on higher datarate waveforms are avoided. Similarly, the mobile
device was configured to transmit beacons at the same rate. Meanwhile, each
rooftop testbed node was configured to its 9 dBi omnidirectional antenna 
pattern. 

All nodes, including the mobile node, were configured to log packets
using a second monitor mode (promiscuous) wireless interface. The mobile node 
was additionally instrumented with a USB GPS receiver that was used both to 
keep a log of position and to synchronize the system clock so that the 
wireless trace was in sync with the GPS position log. During the experiment, 
the mobile node was attached to an elevated (nonconducting) platform on the 
front of a bicycle.

Because it contains identifiers for only research hardware, this data has not 
been anonymized in any way.

[Trace] cu/cu_wart/2010/path_loss (v. 2011-10-24)

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the initial version

@MISC{cu-cu_wart-2010-path_loss-2011-10-24,
  author = {Caleb Phillips and Eric W. Anderson},
  title = {{CRAWDAD} trace cu/cu_wart/2010/path_loss (v. 2011-10-24)}, 
  howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/cu/cu_wart/2010/path_loss},
  month = oct,  
  year = 2011
}
					

This data was collected by Caleb Phillips for the purpose of path loss modeling
work at the University of Colorado (CU) in 2010. It contains RSS measurements
(together with GPS data) collected using the CU Wide Area Radio Testbed 
(CU-WART), which involves seven 802.11 APs with phased array antennas mounted 
on university buildings.

In this experiment, the 6 rooftop CU WART nodes were configured to transmit 80
byte "beacon" packets every 0.5 + U(0.0,0.5) seconds, where U(X,Y) is a 
uniformly distributed random number between X and Y. Beacons are configured to
transmit at 1 Mbps, so that possible effects of Doppler spread on higher 
datarate waveforms are avoided. Similarly, the mobile device was configured to
transmit beacons at the same rate. Meanwhile, each rooftop testbed node was 
configured to its 9 dBi omnidirectional antenna pattern. 

All nodes, including the mobile node, were configured to log packets
using a second monitor mode (promiscuous) wireless interface. The mobile node 
was additionally instrumented with a USB GPS receiver that was used both to 
keep a log of position and to synchronize the system clock so that the 
wireless trace was in sync with the GPS position log. During the experiment, 
the mobile node was attached to an elevated (nonconducting) platform on the 
front of a bicycle.

There are three files. Of them, upstream.txt and downstream.txt contain the 
signal strength measurements. These should be fairly self-explanatory. The 
gps.time.err column is the difference in seconds between when the measurement
was made and the closest GPS point (and hence, indicates the accuracy of the 
GPS location). The AP the frame was received by (or sent by) is a numeric 
identifier (nid), which refers to one of the seven sites given in the YAML at 
the end of this file. Other details such as antenna height, tx power, gain, 
orientation, and location are given in the YAML as well. The third file, 
gps.dat is the output of the GPS track generated by gpsd on the mobile 
receiver, using the following command:

  gpspipe -t -w -f gps.dat

Because it contains identifiers for only research hardware, this data has not 
been anonymized in any way.

[Author] Caleb Phillips

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[Author] Eric W. Anderson

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[Paper] anderson-challenges

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