3GPP: The Unlicensed Journey

Along the long road 3GPP has traversed towards realization of cellular technologies operating in unlicensed bands, evolutions have taken place across the wireless industry and real-world applications, shaping, and at times, altering the expectations, design goals, and foundations of the technology. This paper provides an insight into such evolutions as well as brief descriptions of the 3GPP unlicensed technologies.

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