Banca de DEFESA: JOEL GONÇALVES DE OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOEL GONÇALVES DE OLIVEIRA
DATE: 21/01/2026
TIME: 09:00
LOCAL: virtual
TITLE:

The Quality of Mobile Telephony in Brazil: A Strategy for Verification and Testing

KEY WORDS:

Verification, 5G, MFA, UVM, test scenarios

PAGES: 131
BIG AREA: Ciências Exatas e da Terra
AREA: Ciência da Computação
SUBÁREA: Sistemas de Computação
SPECIALTY: Hardware
SUMMARY:

Brazil has more active SIM cards than inhabitants, driven by the digitalization of commerce, which increases the demand for mobile communication. Emerging technologies and security issues complicate this scenario. Problems in mobile networks, such as blind spots and failure patterns, raise debates about information security and digital sovereignty. Smartphones store sensitive data and are vulnerable to authentication failures. These vulnerabilities are exacerbated by speed and stability issues in mobile networks. Between 2022 and 2025, there was growth in fast transactions, such as PIX (Brazil's instant payment system), phishing attacks, and vulnerabilities that enable the transfer of device ownership, thereby increasing risks. During the pandemic, data leaks were common, often associated with radio-frequency failures that rendered the signal unstable and facilitated third-party exploitation, resulting in losses. This study analyzed mobile networks in Brazil to understand the profile of the connected Brazilian, the state of connectivity, and the potential risks to data and users in the current era of the expansion of high-speed networks and artificial intelligence. The results indicate significant speed gains attributable to 5G, limited coverage expansion in roads and rural areas, and high disconnection rates. This suggests that current mobile telephony solutions do not meet quality of service criteria, negatively impacting user perception and experience when using mobile data. This scenario was studied using the live-load methodology, in which the device is monitored while connected to the mobile network, enabling analysis focused on user perception and service quality.

COMMITTEE MEMBERS:
Presidente - 1694485 - MARCIO EDUARDO KREUTZ
Interna - 1882699 - MONICA MAGALHAES PEREIRA
Externo ao Programa - 3139050 - ROGER KREUTZ IMMICH - UFRNExterno à Instituição - JULIO MATTOS - UFPel
Externa à Instituição - FLAVIA MARISTELA SANTOS NASCIMENTO - IFBA