Just come back from the SON conference, I noticed that Ericsson's dot system was discussed heavily on what it is and how its different from Alcatel-Lucent Light Radio and NSN's Liquid radio. Here is a bit of detail from the Ericsson press release:
Ericsson Radio Dot System is compact and offers flexible mounting. The device weighs 300 grams, is the result of two years of research and development, and incorporates 14 patents. It introduces a revolutionary antenna element, or "dot," which delivers mobile broadband access to users. Because of its convenient size, scalability, and compelling evolution path, this product caters to different kinds of users in medium to large indoor locations, and aims to address operators' needs of offering a complete indoor solution.
Dots are connected and powered via standard internet LAN cables (Category 5/6/7) to indoor radio units that link to a base station. Radio Dot System leverages the same industry-leading features found in Ericsson's macro base station. Deployments and upgrades are simple, addressing growing capacity and coverage requirements. Thus the users' experience is consistent wherever they go and the indoor network evolves in lockstep with the outdoor network. Ericsson Radio Dot System supports integration with Ericsson's carrier Wi-Fi portfolio enabling features such as real-time traffic steering to ensure the best user experience across both Wi-Fi and 3GPP networks.
There was a bit more detail available from a discussion in the Linkedin HetNet group here. My edited version of the discussion:
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A related patent by E///, on how they may be transporting digital I&Q (essentially CPRI) between RadioDot and IRU by introducing APL.






