A Tool for Developing Collaborative Sensing and Cognitive MAC Layer Solutions for 5G in Rural Areas

Abstract

The 5G mobile networks will increase the amount of available spectrum by using new licensed and unlicensed bands. However, most of the newly allocated bandwidth is restricted to higher frequencies, that provides smaller coverage. Lower frequencies, that provide higher ranges, are mostly occupied by either radio or television channels. With the move to digital television, some analog TV channels are available in specific regions, opening the possibility of frequency reuse by third parties. Geolocation databases and collaborative sensing techniques are used to locate and use the available TV Whitespaces (TVWS) for mobile transmission. This paper presents the proposal of a cognitive cycle in the ns-3 simulator (LENA/LTE), which includes collaborative sensing and a cognitive radio resource scheduler. The simulations were done considering a rural area and the results show that the implementation may be useful for further research in developing new solutions for the 5G Cognitive MAC Layer.

Implementation and Evaluation of Nodal Distribution and Movement in a 5G Mobile Network

“…A module called as improved MAC level [26,27] is a significant extension of the 5G NR project existing functional for the MAC level. Based on the success of the LTE and mmWave projects, the developers made functional comparable with the specification and modernized existing schedulers interfaces by that they afforded to use resource distribution at the symbol level.…”

COLAB-5: Um Modulo para Simulação de Redes 5G

“…As alterações enumeradas foram realizadas utilizando como base o CO-LAB [Ferreira et al 2019]. A Figura 2 apresenta as classes do NS-3 que foram alteradas e que serão descritas a seguir em maiores detalhes.…”

“…Caso o limiar P acum não tenha sido ultrapassado, o UE não reporta o resultado do sensoriamento atual, e o gNB assume que o resultado reportado no passado continua a ser válido. Essa abordagem apresentou melhores resultados e maior acurácia que os apresentados na versão anterior da ferramenta [Ferreira et al 2019].…”

Uso de Cadeias de Markov para Otimizar o Sensoriamento Colaborativo do Espectro em Redes 5G

“…O mecanismo foi implementado no simulador NS-3 LENA [Baldo et al 2011]. Foram realizadas várias extensões no simulador para adaptar a camada MAC [Ferreira et al 2019] e para implementar o ciclo descrito na Figura 1(b). Ainda, foram integrados ao simulador os resultados de sensoriamento individual do espectro produzidos no MATLAB pelo algoritmo WIBA [Vartiainen et al 2019, Saarnisaari andVartiainen 2018], no padrão apre-…”