Understanding the IoT connectivity landscape: a contemporary M2M radio technology roadmap.
Sergey D. AndreevOlga GalininaAlexander PyattaevMikhail GerasimenkoTuomas TirronenJohan TorsnerJoachim SachsMischa DohlerYevgeni KoucheryavyPublished in: IEEE Commun. Mag. (2015)