Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

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Saeed Wazir is a South Africa-based journalist with over 15 years of IT experience and a love for reading and writing. He joined Pocket-Lint after writing tech articles for Dot Esports and Screen Rant ...

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