Banda larga móvel privada e sua interacção com as redes de voz da polícia
DOI:
https://doi.org/10.22335/rlct.v14i1.1436Palavras-chave:
Atribuição de frequências, comunicação móvel, rede de telecomunicações, telemóvel, transmissão de dadosResumo
As comunicações de missão crítica utilizadas a nível mundial para a segurança pública têm-sido baseadas em soluções de banda estreita, enquadradas nos diferentes protocolos incluídos na Land Mobile Radio (LMR), tais como o APCO 25, utilizado pela Polícia Nacional. Embora estas tecnologias têm-sido de grande importância e tenham uma maturidade de implementação bastante consolidada para uma transmissão de voz fiável, têm limitações para a transmissão de dados como imagens e vídeos, pelo que faz-se necessário tirar partido de uma tecnologia como a Long Term Evolution (LTE). Tendo em conta esta necessidade, realizou-se uma revisão da literatura científico-técnica, analisando o estado da arte de artigos seleccionados de várias bases de dados; foram também determinados critérios de inclusão e exclusão para o estudo, graças aos quais foi possível identificar que hoje em dia não existe capacidade tecnológica para realizar um desenvolvimento de uma rede LTE para a segurança pública; Com base no acima exposto, foi identificada a necessidade de uma implementação tecnológica que garanta a coexistência das duas redes LMR e LTE, aproveitando os benefícios de cada uma delas numa soma que aumente as capacidades tecnológicas no serviço de polícia.
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