Resource and Mobility Management in the Network Layer of 5G Cellular Ultra-Dense Networks. - Daniel Calabuig; Sokratis Barmpounakis; Sonia Gimenez; Apostolos Kousaridas; Tilak R. Lakshmana; Javier Lorca; Petteri Lundén; Zhe Ren; Pawel Sroka; Emmanuel Ternon; Venkatkumar Venkatasubramanian; Michal Maternia (IEEE Commun. Mag., 2017)