A smart city is acondition where a pervasive, multi-service network is occupied to affordpeoplebetter-qualityactive conditions as well as better public safety. Innovative communication technologies are needed to scope this goal. In specific, awell-organized and reliable broadcast network the stage a crucial role in as long as continue, ubiquitous, and reliable interconnections among users, smart devices, and applications. As aimportance, wireless networking appears as the main enabling announcement technology despite the necessity to face severe experimentations to satisfy the wants arising from a smart environment, such as explosive data volume, heterogeneous data traffic, and maintenance of quality of service restraints. Astimulating approach for meeting the developing data demand due to smart city applications is to adopt suitable methodologies to improve the usage of all potential spectrum resources. Towards this goal, a very promising solution is characterized by the Cognitive Radio technology that enables context-aware competence in order to pursue an efficient use of the accessibleannouncement resources according to the neighboring environment conditions. This thesis provides a review of the features, challenges, and solutions of a smart city message architecture, based on the Cognitive Radio technology, by focusing on two new network paradigms—namely, Heterogeneous Network and Machines-to-Machines communications—that are of differentattention to professionallyprovision smart city applications and services.
Code Domain Non- Orthogonal Multiple Access Schemes for 5G and Beyond Communication Networks: A Review
