CRAWDAD cmu/supermarket

Citation Author(s):
Aveek
Purohit
Shijia
Pan
Kaifei
Chen
Zheng
Sun
Pei
Zhang
Submitted by:
CRAWDAD Team
Last updated:
Tue, 05/27/2014 - 08:00
DOI:
10.21227/vwj6-6w66
Data Format:
License:
49 Views
Categories:
Keywords:
0
0 ratings - Please login to submit your rating.

Abstract 

Round-trip Time-of-flight Measurements from a supermarket.

The dataset is meant to aid development and evaluation of indoor location in complex indoor environments using round-trip time-of-flight (RToF) and magnetometer measurements. The dataset provides Round-trip time-of-flight (RToF) and magnetometer measurements at 1589 mobile node locations from 30 deployed stationary anchors in the 26m x 24m New Wing Yuan supermarket in Sunnyvale, CA. The data was collected during working hours over a period of 15 days. The nodes are equipped with chirp spread spectrum Nanotron nanoLoc radios (802.15.4a) and a Honeywell's HMC5843, a 3-axis digital magnetometer. At every location, 20 distinct readings were obtained for RToF signatures as well magnetometer measurements, to capture the variance, giving a total of 31780 readings.

date/time of measurement start: 2011-02-15

date/time of measurement end: 2011-03-01

collection environment: The data is collected in the New Wing Yuan supermarket in Sunnyvale, CA, USA (1139 N Lawrence Expy Sunnyvale, CA 94089) during working hours. 30 anchor nodes are deployed over the supermarket. Volunteer students equipped with a mobile sensor node measure the RToF values from the anchors at 1589 distinct locations in the aisles and perimeter of the supermarket. An illustration of the layout, product placements, placement of sensor nodes and point of measurements is included in README.pdf.

network configuration: The network consists of 30 deployed anchor nodes equipped with 802.15.4a Nanotron nanoLoc transceivers. A mobile node also equipped with a 802.15.4a Nanotron nanoLoc transceiver attempts to obtain RToF measurement from all anchors in a single-hop network configuration.

data collection methodology: The network consists of 30 deployed anchor nodes (15 at a time) equipped with 802.15.4a Nanotron nanoLoc transceivers. The supermarket is split into two parts and 15 nodes are deployed at a time. A mobile node also equipped with a 802.15.4a Nanotron nanoLoc transceiver polls all 15 deployed anchors on command, over an interval of 30 seconds, waiting 1 second to obtain an RToF measurement from each anchor. 3 retries are attempted in every 1-second slot. The mobile node is attached to a stick and mounted at height of 1.5m from the ground to maintain a constant vertical position. The orientation of the node is always held constant facing the north wall of the supermarket. In addition, a magnetometer reading is recorded at each location. 20 sets of readings are recorded at each location. The RToF and magnetometer measurements are logged as a text file on a workstation attached to the mobile node with timestamps.

limitation: The data at each location is obtained over a period of 20 minutes, covering the entire supermarket area over a period of 15 days. As readings are not obtained simultaneously, the methodology incorporated diurnal variations in measurements.

Traceset

supermarket_rtof

RToF and Magnetometer measurements over a supermarket

supermkt_rtof_trace 

    • file: cmu_supermarket.csv.gz
    • configuration: The network consists of 30 deployed anchor nodes (15 at a time) equipped with 802.15.4a Nanotron nanoLoc transceivers. The supermarket is split into two parts and 15 nodes are deployed at a time. A mobile node also equipped with a 802.15.4a Nanotron nanoLoc transceiver polls all 15 deployed anchors on command, over an interval of 30 seconds, waiting 1 second to obtain an RToF measurement from each anchor. 3 retries are attempted in every 1-second slot. The mobile node is attached to a stick and mounted at height of 1.5m from the ground to maintain a constant vertical position. The orientation of the node is always held constant facing the north wall of the supermarket. In addition, a magnetometer reading is recorded at each location. 20 sets of readings are recorded at each location. The RToF and magnetometer measurements are logged as a text file on a workstation attached to the mobile node with timestamps.
    • format: Comma-separated Matlab data columns: x,y,z,magnetometer reading, 30 RToF readings from anchors NaN = no values available or timeout/out of range
Instructions: 

The files in this directory are a CRAWDAD dataset hosted by IEEE DataPort. 

About CRAWDAD: the Community Resource for Archiving Wireless Data At Dartmouth is a data resource for the research community interested in wireless networks and mobile computing. 

CRAWDAD was founded at Dartmouth College in 2004, led by Tristan Henderson, David Kotz, and Chris McDonald. CRAWDAD datasets are hosted by IEEE DataPort as of November 2022. 

Note: Please use the Data in an ethical and responsible way with the aim of doing no harm to any person or entity for the benefit of society at large. Please respect the privacy of any human subjects whose wireless-network activity is captured by the Data and comply with all applicable laws, including without limitation such applicable laws pertaining to the protection of personal information, security of data, and data breaches. Please do not apply, adapt or develop algorithms for the extraction of the true identity of users and other information of a personal nature, which might constitute personally identifiable information or protected health information under any such applicable laws. Do not publish or otherwise disclose to any other person or entity any information that constitutes personally identifiable information or protected health information under any such applicable laws derived from the Data through manual or automated techniques. 

Please acknowledge the source of the Data in any publications or presentations reporting use of this Data. 

Citation:

Aveek Purohit, Shijia Pan, Kaifei Chen, Zheng Sun, Pei Zhang, cmu/supermarket, https://doi.org/10.15783/C7MW2Z , Date: 20140527

 

Dataset Files

LOGIN TO ACCESS DATASET FILES
Open Access dataset files are accessible to all logged in  users. Don't have a login?  Create a free IEEE account.  IEEE Membership is not required.

Documentation

AttachmentSize
File cmu-supermarket-readme.txt1.6 KB

These datasets are part of Community Resource for Archiving Wireless Data (CRAWDAD). CRAWDAD began in 2004 at Dartmouth College as a place to share wireless network data with the research community. Its purpose was to enable access to data from real networks and real mobile users at a time when collecting such data was challenging and expensive. The archive has continued to grow since its inception, and starting in summer 2022 is being housed on IEEE DataPort.

Questions about CRAWDAD? See our CRAWDAD FAQ. Interested in submitting your dataset to the CRAWDAD collection? Get started, by submitting an Open Access Dataset.