The second wave of 802.11ac Wi-Fi technology, primarily distinguished by new MIMO capabilities, bigger channels and the general ability to handle larger and denser groups of connections, is starting to make its way into enterprises.
MU-MIMO is the piece that’s got everyone excited for wave 2 – it stands for multi-user, multiple-input, multiple-output, meaning that access points use larger numbers of antennae that can be managed algorithmically to provide a more flexible distribution of wireless resources. In essence, these are smarter access points that are better able to handle large numbers of users at any given time, and feature more advanced ways to manage different kinds of wireless links.
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Source: News Feed