6G: A comprehensive survey on technologies, applications, challenges, and research problems

Abstract

The inherent limitations of the network keep on going to be revealed with the continuous deployment of cellular networks. The next generation 6G is motivated by these drawbacks to properly integrate important rate‐hungry applications such as extended reality, wireless brain‐computer interactions, autonomous vehicles, and so on. Also, to support significant applications, 6G will handle large amounts of data transmission in smart cities with much lower latency. It combines many state‐of‐the‐art trends and technology to provide higher data rates for ultra‐reliable and low latency communications. By outlining the system requirements, potential trends, technologies, services, applications, and research progress, this article comprehensively conceptualized the 6G cellular system. Open research issues and current research groups in their field of research are summarized to provide readers with the technology road‐map and the potential challenges to consider in their 6G research.

Emerging IoT Applications in Sustainable Smart Cities for COVID-19: Network Security and Data Preservation Challenges with Future Directions

“…The benefit of H-IoT applications can be determined by how effectively these applications can admire the privacy preferences of patients, staff, and even the enterprises. Concerns regarding the privacy issues with possible threats that are associated with H-IoT applications may be key factors to delay the impeccable approval of these applications in any healthcare organization ( Mahmoud et al., 2021 ). Therefore, it is decisive to recognize the privacy rights of clients and staff, because they play a very significant role to maintain patients, staff, and enterprise trust and confidence in the H-IoT network.…”

Fault‐tolerant wireless‐optical broadband access network with cluster‐controlled architecture

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Mixed-Carrier Communication for Technology Division Multiplexing

“…As illustrated in Figure 1, the beacon position is modulated within a PWM-like envelope to represent the L 1 -BPM bits. A conventional PPM envelope follows Equation (6), where p(t) is a unity pulse of a duration of T b and c k ∈ {c 0 , c 1 , ..., c L 1 −1 } is the PPM symbol sequence, i.e., codeword:…”

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