Y. H. Kim, D. J. Kim, and K. Wachter, A study of mobile user engagement (MoEN): Engagement motivations, perceived value, satisfaction, and continued engagement intention, Decision Support Systems, vol.56, issue.1, pp.361-370, 2013.
DOI : 10.1016/j.dss.2013.07.002

D. Tojib, Y. Tsarenko, and A. Y. Sembada, The facilitating role of smartphones in increasing use of value-added mobile services, OECD Report: OECD Broadband Statistics Update, pp.1220-1240, 2014.
DOI : 10.1504/IJMC.2013.050995

J. G. Andrews, What Will 5G Be?, IEEE Journal on Selected Areas in Communications, vol.32, issue.6, pp.1065-1082, 2014.
DOI : 10.1109/JSAC.2014.2328098

URL : http://repositori.upf.edu/bitstream/10230/23406/1/Andrews_IEEE%20JSAC.pdf

D. Kreutz, F. M. Ramos, P. Verissimo, C. E. Rothenberg, S. Azodolmolky et al., Software-Defined Networking: A Comprehensive Survey, Proceedings of the IEEE, pp.14-76, 2014.
DOI : 10.1109/JPROC.2014.2371999

URL : http://arxiv.org/abs/1406.0440

M. Chiosi, Network Functions Virtualisation: An Introduction, Benefits, Enablers, Challenges & Call for Action, SDN and OpenFlow World Congress, 2012.

J. G. Andrews, Seven ways that HetNets are a cellular paradigm shift, IEEE Communications Magazine, vol.51, issue.3, pp.136-144, 2013.
DOI : 10.1109/MCOM.2013.6476878

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.269.6705

A. Osseiran, Scenarios for 5G mobile and wireless communications: the vision of the METIS project, IEEE Communications Magazine, vol.52, issue.5, pp.26-35, 2014.
DOI : 10.1109/MCOM.2014.6815890

J. M. Ruiz-avils, Analysis of Limitations of Mobility Load Balancing in a Live LTE System, IEEE Wireless Communications Letters, vol.4, issue.4, 2015.
DOI : 10.1109/LWC.2015.2430345

W. Wang, J. Zhang, and Q. Zhang, Cooperative Cell Outage Detection in Self-Organising Femtocell Networks, IEEE INFOCOM, pp.782-790, 2013.
DOI : 10.1109/infcom.2013.6566865