Stunner Dataset

Stunner Android app has been available for download from the Play Store since 26th December 2013. Over the years, stunner has been downloaded and installed by 14,727 users on 745 different device. The functionality of our app is to provide the user with information about the current network environment of the phone: private and public IP, NAT type, MAC address, and some other network related details. At the same time, the app collects data about the phone and logs it to our servers. The data collection includes more than 70 million data records from over 100 countries measuring the NAT characteristics of more than 1300 carriers and over 35000 WiFi environments.

Citation Request

The dataset was provided by the University of Szeged as a result of an ongoing data collection campaign, and publicly available at http://www.inf.u-szeged.hu/stunner for non-profit usage. The campaign was supported by the Hungarian Government and the European Regional Development Fund under the grant number GINOP-2.3.2-15-2016-00037 (“Internet of Living Things”) and by the Hungarian Ministry of Human Capacities (grant 20391-3/2018/FEKUSTRAT)

Please cite this paper: Zoltán Szabó, Krisztián Téglás, Árpád Berta, Márk Jelasity, Vilmos Bilicki. Stunner: A Smart Phone Trace for Developing Decentralized Edge Systems. In Proceedings of the 19th International Conference on Distributed Applications and Interoperable Systems (DAIS 2019), Copenhagen, Denmark, 2019.

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Measurement description

In versions 1-19 measurements were triggered either by the user (when the app is used) or by specific events that signal the change of some of the properties we measure: battery charging status, network availability. There was periodic measurement as well every 10 minutes, if no other events occurred. More info.

Since version 20, we collect data only when the phone is on a charger. This was necessary because Android has become very hostile to background processes when the phone is not on a charger, in an effort to save energy. Android event handlers have also became more restricted, so we can use them only under limited circumstances or on early Androids. The events raised by connecting to a charger or a network can still be caught by the Android job scheduler, but the timing of these events is not very reliable. We check the state of the phone every minute, and if there is a change in any important locally available networking parameter or in charging availability, we perform a full measurement. A measurement is still triggered if the user explicitly requests one, and it is also triggered by an incoming P2P measurement request. Also, if there is no measurement for at least 10 minutes, a full measurement is performed. More info.

P2P connection measurements are also a new feature in the version 20 that are performed every time a measurement is carried out. They are based on the WebRTC protocol, with Firebase as a signaling server, and a STUN server. We build and measure only direct connections, the TURN protocol for relaying is not used. Every node that is online (has network access and is on a charger) attempts to connect to a peer. To do this, the node sends a request to the Firebase server after collecting its own network data. The server attempts to find a random online peer and manages the information exchange using the Session Description Protocol (SDP) to help create a two-way P2P connection over UDP. If the two-way channel is successfully opened then a tiny data massage is exchanged. The channel is always closed at the end of the measurement. One connection is allowed at a time, every additional offer is rejected. The signaling server maintains an online membership list. More info.

Data structure

Stunner Data is available in format of CSV files per user per month.

Vesions/releases