TY  - JOUR
A1  - Wamser, Florian
A1  - Seufert, Anika
A1  - Hall, Andrew
A1  - Wunderer, Stefan
A1  - Hoßfeld, Tobias
T1  - Valid statements by the crowd: statistical measures for precision in crowdsourced mobile measurements
JF  - Network
N2  - Crowdsourced network measurements (CNMs) are becoming increasingly popular as they assess the performance of a mobile network from the end user's perspective on a large scale. Here, network measurements are performed directly on the end-users' devices, thus taking advantage of the real-world conditions end-users encounter. However, this type of uncontrolled measurement raises questions about its validity and reliability. The problem lies in the nature of this type of data collection. In CNMs, mobile network subscribers are involved to a large extent in the measurement process, and collect data themselves for the operator. The collection of data on user devices in arbitrary locations and at uncontrolled times requires means to ensure validity and reliability. To address this issue, our paper defines concepts and guidelines for analyzing the precision of CNMs; specifically, the number of measurements required to make valid statements. In addition to the formal definition of the aspect, we illustrate the problem and use an extensive sample data set to show possible assessment approaches. This data set consists of more than 20.4 million crowdsourced mobile measurements from across France, measured by a commercial data provider.
KW  - mobile networks
KW  - crowdsourced measurements
KW  - statistical validity
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-284154
SN  - 2673-8732
VL  - 1
IS  - 2
SP  - 215
EP  - 232
ER  -