Note: This metadata was prepared by the CRAWDAD team and verified by the data set (or tool) authors. We have made every effort to ensure its accuracy, but urge all users to consider the metadata and data carefully and be sure that their use in research is consistent with the nature and limitations of the data. We welcome any corrections.
This metadata was prepared based on the following reference(s):
|
version
| v. 2007-08-27 |
|
changes
| the initial version |
|
bibtex
|
@MISC{ilesansfil-wifidog-2007-08-27,
author = {Michael Lenczner and Benoit Grégoire and François Proulx},
title = {{CRAWDAD} data set ilesansfil/wifidog (v. 2007-08-27)},
howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/ilesansfil/wifidog},
month = aug,
year = 2007
}
|
| metadata last modified | 2007-09-07 |
| summary | This data set contains user session traces which were collected from
a large number of free Wi-Fi hotspots in Montréal, Québec, Canada for three years. |
| release date | 2007-09-07 |
| measurement start | 2004-08-28 |
| measurement end | 2007-08-28 |
| authors | Michael Lenczner
Benoit Grégoire
François Proulx
|
|
web site
| http://www.crawdad.org/ilesansfil/wifidog |
|
wiki
|
go to the wiki page for this data set
|
| keyword | 802.11, Wi-Fi hotspot |
| measurement purposes | Usage Characterization
|
| network type | 802.11 infrastructure |
| environment | Île Sans Fil (French for "Island Without Wires", also known as ISF),
a non-profit organization, operates a network of free Wi-Fi hotspots in
Montréal, Québec, Canada. It now counts 140 hotspots and over 45,000 users.
All of the hotspots are located in publicly accessible spaces. The ISF hospots
are deployed mostly in cafes, restaurants and bars, but also in libraries,
funeral homes, doctors' offices, and BIAs (Business Improvement Agencies)
to cover parks and sections of popular commercial streets.
For more information, please see http://www.ilesansfil.org
ISF started the WifiDog project to provide a solution for managing hotspots.
WifiDog is a software solution which is designed to meet the initial ISF
requirements, such as content-centered nature of the auth server,
the exceptionally extensive multilingual support, and the very thin gateway.
For more information, please http://dev.wifidog.org/
The ISF team collects user session data that are neccessary for the operation
of some features (like location-aware content delivery, prior-view aware
content delivery, viewing users online at the same hotspot, etc.)
Other motivations include detecting and controlling bandwidth hogging,
and knowing how, where, and how much their network is used. |
| network | WifiDog is composed of the following 2 components:
- the gateway is a daemon process that gets installed on every wireless router on a hotspot.
- the auth server is a web application that gets installed in a central location.
WifiDog enables a new hotspot site to configure the equipment by just plugging it
in the existing network and entering the new router password.
Existing networks, such as DSL and cable connections, have proven rather unreliable,
so WifiDog makes monitoring easier in the following ways:
- it graphically displays the status and location of each hotspot (see http://carte.ilesansfil.org/).
- in case of fault, it sends mail to local support resources assigned to that hotspot.
- it is completely unaffected by network address translation or firewalls upstream.
- finally it does all this without any extra software (VPN, SNMP, etc). |
| collection | The ISF team collects user session (i.e., between login and logout) data such as
account (user) id, MAC address, login and logout time, hotspot id, and
amount of data transferred incoming and outgoing.
They also logs content display and click-through, but only for content being displayed
on the auth server, and therefore the data are not included in this data set. |
| sanitization | The ISF team anonymized account id (user_id), connection id (conn_id), user MAC address
(user_mac), and hotspot id (node_id). They performed hashing with a different random
seed for every value. The code that generated the anonymised data can be found at
http://dev.wifidog.org/browser/trunk/wifidog-auth/wifidog/classes/StatisticReport/AnonymisedDataExport.php |
| note | We have a geographic data available for this dataset.
You may obtain it by agreeing to some additional legal conditions.
Please contact us at crawdad -at- cs.dartmouth.edu |
|
tracesets included
| ilesansfil/wifidog/session (v. 2007-08-27)
|
|
version
| v. 2007-08-27 |
|
changes
| the initial version |
|
bibtex
|
@MISC{ilesansfil-wifidog-session-2007-08-27,
author = {Michael Lenczner and Benoit Grégoire and François Proulx},
title = {{CRAWDAD} trace set ilesansfil/wifidog/session (v. 2007-08-27)},
howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/ilesansfil/wifidog/session},
month = aug,
year = 2007
}
|
| metadata last modified | 2007-09-07 |
| summary | This traceset contains user sessions which were collected from
a large number of free Wi-Fi hotspots in Montréal, Québec, Canada for three years. |
| release date | 2007-09-07 |
| measurement start | 2004-08-28 |
| measurement end | 2007-08-28 |
| measurement purposes | Usage Characterization
|
| network type | 802.11 infrastructure |
| methodology | When a user connects to a gateway installed on a wireless router, the gateway
opens a session on the auth server (that knows what hotspot the user is connecting
from), the auth server assigns a session number (connection id) and gives it
to the gateway. The gateway then counts the in and out traffic transferred during
that session, and periodically sends it to the auth server for each connected user.
Therefore, no merge of data from diffrent hotspots is necessary, the only place
data is logged is on the auth server. |
| parent data | ilesansfil/wifidog (v. 2007-08-27)
|
|
traces included
| ilesansfil/wifidog/session/04_07 (v. 2007-08-27)
|
|
version
| v. 2007-08-27 |
|
changes
| the initial version |
|
bibtex
|
@MISC{ilesansfil-wifidog-session-04_07-2007-08-27,
author = {Michael Lenczner and Benoit Grégoire and François Proulx},
title = {{CRAWDAD} trace ilesansfil/wifidog/session/04_07 (v. 2007-08-27)},
howpublished = {Downloaded from http://crawdad.cs.dartmouth.edu/ilesansfil/wifidog/session/04_07},
month = aug,
year = 2007
}
|
| metadata last modified | 2007-09-07 |
| summary | User session traces which were collected from a large number of
free Wi-Fi hotspots in Montréal, Québec, Canada for three years. |
| derived | false |
| release date | 2007-09-07 |
| measurement start | 2004-08-28 |
| measurement end | 2007-08-28 |
| configuration | The logged data are stored in a relational database in normalized form
and retrieved in realtime as needed. There is no post-processing
done on the data.
This trace contains 587782 user sessions for 69689 (distinct) users,
which were collected from 206 hotspots for three years. |
| format | The trace includes postgresql compatible file of SQL statements.
The table created has the same column names, and the same datatype as
the real data. The table schema is as follows:
CREATE TABLE connections_anonymised (
conn_id text NOT NULL,
timestamp_in timestamp,
node_id text,
timestamp_out timestamp,
user_id text NOT NULL DEFAULT '',
user_mac text,
incoming int8,
outgoing int8);
where
conn_id : connection id
timestamp_in : login time
node_id : hotspot id
timestamp_out : logout time
user_id : user account id
user_mac : user MAC address
incoming : incoming data transferred (Bytes)
outgoing : outgoing data transferred (Bytes) |
| download url | Download (47.2 MB tar.gz) from US UK |
| parent data | ilesansfil/wifidog/session (v. 2007-08-27)
|
