Addressing Security for 5G Cloud Radio Access Networks

| April 8, 2019

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Small cells have been around for a little more than a decade and they will become ever more important in 5G era. Per the Small Cell Forum’s definition, a small cell is a radio access point with low radio frequency (RF) power output, footprint and range. It is operator controlled and can be deployed indoors or outdoors, and in licensed, shared or unlicensed spectrum. In addition to small cells, centralized radio access network (CRAN) is evolving, and over time both of these technologies have crossed over - CRAN is one of the preferred modes of small cell deployment. In case of CRAN, the remote radio head (RRH) is physically separated from the baseband unit (BBU) with multiple distributed RRHs connected to a central BBU. A very common use case for such deployment is a multi-tenant dwelling, such as high-rise apartments, where each unit may have an RRH connected over Ethernet to a centralized BBU, potentially somewhere in the basement of multi-tenant dwelling. The BBU, in turn, is connected to a central office over high-capacity fiber.

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