## 7 Conclusions  
Orchestration and E2E control of 5G systems will be vital to effectively coordinate and explore the full potential of 5G technology. This work has elaborated a multi-provider orchestration and management architecture and framework to address the service challenges of network slicing when utilizing federated resources. In particular, a Multi-Provider Service Leader plane is introduced considering:  
* Its main functional components, including the Multi-Provider Slice Manager, United Connectivity Resource Manager, and United Cloud Mediator elements. * Interworking issues with the conventional single administrator Fully Fledged network domain, wherein NSSIs are established by combining computing, storage, and network slates with RAN, transport, and core network capabilities. The main operations are explained considering a multi-provider NSI instantiation and management, also providing insight into the further architectural and operational challenges. A Multi-Provider Network Slice Selector is also introduced and tested to solve issues in the RAN and edge of the cloud. The final result of this work aims to achieve the following contributions worldwide:  
1. To guarantee the fulfillment of the requirements of each application and, therefore, better QoS and experience to users;
2. Ensure flexibility for new business models, which will imply new services and better prices for users;
3. Enable the improvement of competition, which will also imply better prices for users;
4. Facilitate the establishment of regulatory models and, consequently, greater control and organization of the regulatory body;
5. Improve sustainability, as all the resources of 5G networks will be better utilized and intelligent applications may effectively and simultaneously exist, minimizing the consumption of, for example, electricity, fossil fuels, and so on. Further research is essential to bring a pioneering study of computational processing and orchestration structures towards the requirements of better performance, resilience, and international standardization of 5G and next-generation mobile networks. In this sense, our future work will focus on integrating and implementing the whole 5G-horizontal Orchestrator from the definition of the conceptual model to all the blocks proposed in its architecture to have a complete framework and then reduce regulatory barriers as well as improve business models for expanding and improving the performance of 5G networks and beyond. Figure 13: Consolidation of network slice selection. **Author Contributions:** Conceptualization, J.O.R.B.J. and M.M.J. ; methodology, D.C.d.S. and R.M.S. ; software, D.C.d.S. ; validation, J.O.R.B.J. and D.C.d.S. ; formal analysis, R.M.S. and C.E.C. ; investigation, J.O.R.B.J., D.C.d.S., and M.M.J. ; resources, D.C.d.S. ; data curation, D.C.d.S. ; writing--original draft preparation, J.O.R.B.J. ; writing--review and editing, J.O.R.B.J., D.C.d.S., R.M.S., and C.E.C. ; visualization, C.E.C. ; supervision, C.E.C. ; project administration, J.O.R.B.J. All authors have read and agreed to the published version of the manuscript. **Funding:** This research received no external funding. **Institutional Review Board Statement:** Not applicable. **Infrared Consent Statement:** Not applicable. **Data Availability Statement:** Not applicable. **Acknowledgments:** This work is supported by the Department of Computer Engineering and Digital Systems (PCS) of Escola Politecnica da USP (EPUSP), the School of Engineering--University of Sao Paulo (USP), Brazil; the Coordination for the Improvement of Higher Education Personnel (CAPES) in Brazil; and the State University of Tocantins (UNITINS), Brazil. The authors are also grateful for the contributions of [PERSON], [PERSON], and undergraduate engineer, [PERSON]. **Conflicts of Interest:** The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper. **Nomenclature**  
The following abbreviations and symbols are used in this manuscript:  
A.