ICIN 2018, the 21st edition of the long-standing ICIN conference series, took place on 20-22 February, in Paris, France. It was technically co-sponsored by IEEE ComSoc and IFIP, and held in cooperation with ACM Sigmobile, with Orange, Nokia and Gandi being patrons (gold, silver, bronze, respectively). The conference was attended by 125 delegates from around the globe, representing academia, research institutes, standardization organizations, network operators and equipment vendors. As with all previous editions of ICIN, from the first edition in 1989 onward, ICIN 2018 provided presentations on the latest research and development projects in the field of mobile communications, along with sharing market experiences, discussing trends and setting out directions for industry