Ubiquitous networking 4th International Symposium, UNet 2018, Hammamet, Tunisia, May 2-5, 2018 : revised selected papers - Boudriga, Noureddine; Alouini, Mohamed-Slim 19XX-; Rekhis, Slim; Sabir, Essaïd; Pollin, Sofie (Computer communication networks and telecommunications, 2018)