Smart cities at the center of Mobile World Congress

BARCELONA -- The big themes of Mobile World Congress (MWC) so far center around the internet of things, artificial intelligence and 5g wireless.

But you can add in more than 35 new smartphones and a smattering of products and services related to just about anything in wireless communications and mobility.

There are 100,000 visitors at MWC this year and thousands of vendors. Something, it seems, for everybody.

Major companies like Samsung have mega-booths, but there are some thematic exhibits too, like the GSM Association's Innovation City, which focuses heavily on smart city-related tech.

AT&T has set up an exhibit also showing off smart city tech, including a light pole equipped with sensors that can communicate to public safety and traffic officials about road, parking and pedestrian conditions. Sensors can also be installed to monitor air pollution, weather or the sound of gunshots.

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