Today, both mobile services and application's usage and pace are accelerating. The statistics show beyond any doubt that wireless and cellular network technologies need to be enhanced to support such demands. To provide a solution towards meeting new and ever more stringent end-user requirements, mobile stakeholders are preparing the 5G technology of mobile broadband networking. 5G will be characterized by ultra-high traffic volume density, ultra-high connection density or ultra-high mobility, moving from a cell centric to a user-centric technology.

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Mobile network operators need new approaches to keep up with traffic, which is doubling roughly every 1.5 years. These new approaches bring new challenges. This project has explored allowing mobile devices to use multiple spectrum bands at once (carrier aggregation), using multiple cellular infrastructures at once (multi-network access), using small cells, and using spectrum at higher frequencies than was previously cost-effective (millimeter wave bands). It has developed new approaches to assessing the capacity of small cells at high frequencies, and thus designing microcellular networks. It finds that the distinct propagation characteristics of millimeter-wave spectrum lead to unexpected capacity levels when cells become small.

CONQUEST explored the Carrier Aggregation technique to obtain high spectral efficiency, through the massification of small cells (SCs), together with new network technologies like C-RAN. Scenarios with exclusive spectrum access and spectrum sharing will be explored. Spectrum sharing assumes that two or more mobile operators/carriers have dedicated spectrum for macro cellular layer while SCs will use exclusive shared spectrum (by paying a fee) or share the access to non-licensed spectrum in an opportunist manner. yhave been be done with programmable electronic envisaging demonstrating the concept in real environments. Entrepreneurship is also a target and training was provided in the venues of the CONQUEST Workshops. Cost/revenue optimization has also been explored in the research. We have shown that much greater capacities can be achieved with no increase in infrastructure costs or spectrum holdings through multi-network access, provided that the towers of different mobile network operators are not co-located.

IT has contributed with analytical formulations, simulation, carrier aggregation, inclusion of spectrum sharing, hardware testing in the ORCIP platform (an FCT infrastructure recently approved, which will provide equipment and measurement instruments for testing, as well as support for real operation of the HetNet infrastructure, http://www.orcip.pt), design and implementation of the drones small cells and cost/revenue optimization, entrepreneurship and business strategies. IT has also provided the required interactions to PDMFC, the Portuguese SME that is interested in exploring the technology, and the Teamup5G European MSCA ITN has just started during the project. CISUC has contributed with opportunistic access to spectrum, aspects of spectrum sharing, simulation, security issues and MAC sub-layer protocols. CISUC has also offered its expertise on business strategies and economic aspects of mobile networking.The CMU team has contributed with knowledge on spectrum sharing and carrier aggregation as well as aspect of public policy in the management of spectrum in multi-access networks.

The team is committed in promoting future expansion of project through a Portuguese demonstration (TRL 5/6) project with PDMFC, efforts with the regulator (ICP-ANACOM) in Portugal to boost the introduction of spectrum sharing availability, and to seek for support from government agencies, companies, and industry consortia through CMU. Through the entrepreneurship initiatives, the creation of a start-up will be pursued. The CONQUEST research team will start interacting with potential financial investors who, together with PDMFC will establish a business plan to be developed the pre-commercial prototypes of the drone small cells family of products, supporting spectrum sharing and aggregation as well as spatial processing/ security solutions (solutions to be developed in the next phase), and then bring it to industrial production and commercialization.

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