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The dartmouth/zigbee_radio dataset (v. 2008-01-07)  >  the Sidewalk traceset

There are 2 traces in this traceset
download the Sidewalk.tar.gz file
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size="4.0KB" type="gz" md5="a7fb93102d30bda84e5cccb5e62137ef"
last modified
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the initial version.
short description

Traceset of outdor experiments in a sidewalk measuring the radio characteristics of 802.15.4 mobile person-to-person communications.


The traceset contains results from outdoor experiments along a sidewalk which is an example of urban environment.

release date
date/time of measurement start
date/time of measurement end

This set of experiments show the radio behaviour during a mobile-to-mobile communication rendezvous in the common case of people carrying short range radio nodes and crossing each other in a typical urban environment: a sidewalk.

In this case we record RSSI (Received Signal Strength Indicator), LQI (Link Quality Indicator), and throughput values measured at the receiver as a function of the transmitter and receiver distance. The experiments consists of having two people carrying a transmitting and a receiving mote walking toward each other from a long distance and eventually passing and crossing each other. The sidewalk runs along a street which is about 15 meters away from buildings on both sides.

Since the measurements are reported as a function of the distance between the sender and the receiver we mark a 160 meter portion of the sidewalk. Each marker is 2 meters apart and every measurement starts with the two people located at a distance of 160 meters (in order to start the experiment by having them out of radio contact). Every time each person encounters a marker, the user button of the mote is clicked and a counter, which again represents an abstraction of the distance walked, is incremented. Every RSSI and LQI sample is stamped with the latest marker value which means that the RSSI and LQI values fall into bins identified by the number of markers minus one. The RSSI, LQI, and throughput values at the receiver at position i with the transmitter at position j are calculated as the average of the RSSI, LQI, and throughput values collected by the receiver between position i and i+1 (assuming the receiver moves according to the i to i+1 direction).

By knowing the starting location of the nodes it is possible to determine the relative sender-receiver distance and an RSSI, LQI, and throughput map for each distance.

Two cases are considered: the mote is hung on the chest as the necklace case and the mote is carried in the pocket as the pocket case.

 the dartmouth/zigbee_radio/Sidewalk/necklace trace
 the dartmouth/zigbee_radio/Sidewalk/pocket trace
 how to cite this traceset