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

There are 2 traces in this traceset
download the Hallway_peoplecrossing.tar.gz file
from a CRAWDAD mirror:  US UK AU
size="4.0KB" type="gz" md5="b689441a59013d77a387f56af51baeb6"
last modified
2008-01-07
reason for most recent change
the initial version.
short description

Traceset of indoor experiments in a hallway in an office building measuring the radio characteristics of 802.15.4 mobile person-to-person communications.

description

The traceset contains results from indoors experiments in a 55 meter hallway in an office building where people approach each other from a long distance.

release date
2008-01-07
date/time of measurement start
2007-08-15
date/time of measurement end
2007-08-16
methodology

This experiment is carried in a building hallway of an office building. The hallway represents one of the common indoor scenarios where people approach each other from a long distance, get in radio contact and pass each other.

In this case we take RSSI (Received Signal Strength Indicator), LQI (Link Quality Indicator), and throughput measurements at the receiver as a function of the transmitter-receiver distance. The 55 meter hallway is marked by equally spaced markers every 2 meters and starting the experiments with the people at the far edges of the hallway.

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