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Your search keyword '"Aguilar-Gonzalez, R. (Rafael)"' showing total 2 results
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2 results on '"Aguilar-Gonzalez, R. (Rafael)"'

1. Spectrum challenges for beyond 5G:the case of Mexico

Author

Lopez-Lopez, L. (Lizeth), Matinmikko-Blue, M. (Marja), Cardenas-Juarez, M. (Marco), Stevens-Navarro, E. (Enrique), Aguilar-Gonzalez, R. (Rafael), and Katz, M. (Marcos)

Subjects
spectrum regulation, spectrum measurements, spectrum challenges, beyond 5G
Abstract

In recent years, there has been an increasing interest in satisfying the spectrum demand for communications beyond 5G (B5G) at a global level. However, in such a large and diverse country as Mexico, the implementation of B5G wireless networks towards 6G will require new spectrum regulation policies that also take into account the particular aspects of the country, such as population density, geographic diversity, as well as social and economic issues. This paper discusses the asymmetries of the urban and rural scenarios of mobile communications and examines their relationship to the current status of the spectrum for 5G mobile communications in Mexico. Then, it explores the spectrum-related challenges that must be overcome to attain ambitious goals beyond 5G technologies. Thus showing the necessity of novel spectrum allocation mechanisms that consider the myriad of scenarios and their different demands in similar countries, in order to satisfy the requirements of B5G wireless communications and networks.

Published
2020

2. Database-assisted distributed and cloud-based access methods for unlicensed and radar bands

Author

Khan, Z. (Zaheer), Lehtomäki, J. J. (Janne J.), Aguilar-Gonzalez, R. (Rafael), Vuohtoniemi, R. (Risto), Hossain, E. (Ekram), DaSilva, L. A. (Luiz A.), Marshall, A. (Alan), Khan, Z. (Zaheer), Lehtomäki, J. J. (Janne J.), Aguilar-Gonzalez, R. (Rafael), Vuohtoniemi, R. (Risto), Hossain, E. (Ekram), DaSilva, L. A. (Luiz A.), and Marshall, A. (Alan)

Abstract

This paper focuses on the design of methods which enable unlicensed devices to use the frequency spectrum already allocated to rotating radar systems without causing interference to those radars. We first present a database-assisted spectrum sharing/co-existence mechanism for radar spectrum bands. This mechanism takes into account the real spectrum usage behavior of different radars, and is also implemented by prototyping a real-time rotating radar beam emulator, a radar spectrum database using MySQL software, and spectrum access algorithm on wireless open access research platform. Then we propose a cloud-based unified channel access (UCA) method and a distributed UCA method for co-existence of multiple competing users in unlicensed and rotating radar spectrum bands. We model the UCA problem as a game and propose iterative methods (i.e., algorithms) to obtain the solution of the game. We study the stability of the proposed methods under several different scenarios. We show that the proposed UCA game is a potential game, and also show that the proposed methods guarantee convergence to a Nash equilibrium. Our results show that the cloud-based method allows fast convergence and can achieve performance that is close to optimal solution.

Published
2017

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