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1. A. Kivi, Measuring mobile service usage: methods and measurements points, International Journal of Mobile Communications, vol. 7, no. 4, pp. 415-435, 2009 (bib)

   Abstract: A comprehensive understanding of mobile service usage is increasingly difficult as a fragmented user base is accessing internet-based services using multiple wireless networks. In this paper, alternative data collection methods are reviewed. Surveys and end-user monitoring provide very detailed sample-based data, whereas wireless network data are less granular but cover an operator?s entire subscriber base. Servers give detailed data on a focused user base. In future, survey-based methods will be increasingly complemented with automated measurements. Multifunctional mobile handsets and servers of internet-based service providers seem the most promising measurement points, whereas 2G/3G mobile networks are less useful as traffic leaks to alternative networks.