“…Operational Services: The 5G-XHaul Architectural Perspective Anna Tzanakaki (1) , Markos Anastasopoulos (1) , Dimitra Simeonidou (1) , Ignacio Berberana (2) , Dimitris Syrivelis (3) , Thanasis Korakis (3) , Paris Flegkas (3) , Daniel Camps Mur (4) , Ilker Demirkol (4) , Jesús Gutiérrez (5) , Eckhard Grass (5) , Qing Wei (6) , Emmanouil Pateromichelakis (6) , Albrecht Fehske (7) , Michael Grieger (7) , Michael Eiselt (8) , Jens Bartelt (9) , George Lyberopoulos (10) , Eleni Theodoropoulou (10) I. INTRODUCTION To meet the ever increasing growth of mobile traffic demands, the traditional wireless access network architecture based on single layer macro-cells is being currently transformed to an architecture comprising a large number of smaller cells with densely deployed access points (APs), combined with micro and macro-cells.…”