Performance evaluation of wireless local area network with congested fading channels

The IEEE 802.11ay wireless communication standard consents gadgets to link in the spectrum of millimeter wave (mm-Wave) 60 Giga Hertz band through 100 Gbps bandwidth. The development of promising high bandwidth in communication networks is a must as QoS, throughput and error rates of bandwidth-intensive applications like merged reality (MR), artificial intelligence (AI) related apps or wireless communication boggling exceed the extent of the chronic 802.11 standard established in 2012. Thus, the IEEE 802.11ay task group committee has newly amended recent physical (PHY) and medium access control (MAC) blueprints to guarantee a technical achievement especially in link delay on multipath fading channels (MPFC). However, due to the congestion of super bandwidth intensive apps such as IoT and big data, we propose to diversify a propagation delay to practical extension. This article then focuses on a real-world situation and how the IEEE 802.11ay design is affected by the performance of mm-Wave propagation. In specific, we randomize the unstable MPFC link capacity by taking the divergence of congested network parameters into account. The efficiency of congested MPFC-based wireless network is simulated and confirmed by advancements described in the standard

The impact of noise on detecting the arrival angle using the root-WSF algorithm

This article discusses three standards of Wi-Fi: traditional, current and next-generation Wi-Fi. These standards have been tested for their ability to detect the arrival angle of a noisy system. In this study, we chose to work with an intelligent system whose noise becomes more and more important to detect the desired angle of arrival. However, the use of the weighted subspace fitting (WSF) algorithm was able to detect all angles even for the 5th generation Wi-Fi without any problem, and therefore proved its robustness against noise

Performance Evaluation of IEEE 802.11ad in Evolving Wi-Fi Networks

The IEEE 802.11ad technology, which allows wireless devices to communicate in the unlicensed 60 GHz ISM band, promisingly provides multi-Gbps data rates for bandwidth-intensive applications. After years of research and development, we are now observing an increasing number of commodity IEEE 802.11ad radios that motivate researchers to exploit the IEEE 801.11ad capability for applications. This work first conducts an empirical study on the IEEE 802.11ad performance. In particular, we characterize the performance of IEEE 802.11ad links considering the variation of network parameters and interference. Secondly, we investigate the possibility of introducing IEEE 802.11ad to an evolving Wi-Fi network. The evaluation results show that our off-the-shelf IEEE 802.11ad hardware can achieve the Gbps level throughput of the transmission control protocol (TCP) and user datagram protocol (UDP). However, the evolvement is not trivial since the hardware can not well maintain the 60 GHz link. The main reason is lacking the fast switchover function between an IEEE 802.11ad and a legacy Wi-Fi link. We then seek the potential of multipath TCP (MPTCP) for the expected switchover. The default MPTCP, which enables data transmissions on both the IEEE 802.11ad and Wi-Fi links, is harmful to the IEEE 802.11ad throughput. Meanwhile, the backup mode of MPTCP, in which the Wi-Fi link acts as a backup for IEEE 802.11ad one, can maintain the comparable performance. Therefore, we propose to adopt MPTCP with the backup mode in the evolving Wi-Fi networks. The efficiency of MPTCP-based switchover is confirmed by conducting real experiments

Análise da utilização do 5G em aplicações de redes elétricas inteligentes

The Brazilian electrical system has particular characteristics that demand very specific operational requirements and Smart Grids applications. One example is the fact of the system is mostly interconnected, with a large territorial extension and with most of the electric generation being of hydraulic origin, what is a situation that allows the inclusion of water resource monitoring as an Smart Grids application. In addition, other applications are present, such as remote metering, energy management, automation, demand response, vehicular electrification, distributed generation and control of protection systems. One factor that makes these applications viable is the use of communication technologies, which must meet specific requirements for each kind of application. Therefore, a wide range of technologies need to be analyzed carefully and technically for each case, such as WiMAX, NB-IoT, LoRa, Sigfox, Bluetooth, Zigbee, GOES, Wi-Fi, Ingenu, 6LoWPAN, DASH7 and cellular technologies. In this scenario, the telecommunications system in Brazil is constantly being updated and is being prepared to receive the 5G cellular network, which has been analyzed in all the aforementioned applications and is shown to be viable in most of them. In addi tion, 5G has been widely studied, being one of the most cited wireless communication technologies in scientific publications related to Smart Grids. This scenario shows a great interest of the scientific community of 5G in Smart Grids context.O sistema elétrico brasileiro possui características particulares que demandam requisitos operacionais e aplicações de redes elétricas inteligentes bastante específicas. Pode-se citar, por exemplo, o fato de o sistema ser majoritariamente interligado, com grande extensão territorial e com a maior parte da geração elétrica sendo de origem hidráulica, situação que permite a inclusão de monitoramento de recurso hídrico como uma aplicação de redes elétricas inteligentes. Além disso, outras aplicações estão presentes, tais como medição remota, gerenciamento de energia, automação, resposta de demanda, eletrificação veicular, geração distribuída e controle de sistemas de proteção. Um fator que viabiliza estas aplicações é o uso de tecnologias de comunicação, as quais devem atender requisitos específicos para cada uma delas. Sendo assim, uma vasta gama de tecnologias precisam ser analisadas criteriosamente e tecnicamente para cada caso, como por exemplo WiMAX, NB-IoT, LoRa, Sigfox, Bluetooth, Zigbee, GOES, Wi-Fi, Ingenu, 6LoWPAN, DASH7 e as diversas tecnologias celulares. Neste cenário, o sistema de telecomunicações no Brasil está em constante atualização e se prepara para a chegada da rede móvel 5G, o qual foi analisado em todas as aplicações citadas e se mostra viável na maioria delas. Além disso, o 5G vem sendo amplamente estudado, sendo uma das tecnologias de comunicação sem fio mais citadas em publicações científicas relacionadas às redes elétricas inteligentes