January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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Cellular connectivity
The most prevalent communication form is cellular radio and specifically cellular data. While mobile communication devices, had existed for many years before cellular technology, they had limited coverage, shared frequency space, and were essentially two-way radios. Bell Labs built some trial mobile phone technologies in the 1940s (Mobile Telephone Service) and 1950s (Improved Mobile Telephone Service) but had very limited success. There were also no uniform standards for mobile telephony at the time. It wasn't until the cellular concept was devised by Douglas H. Ring and Rae Young in 1947 and then built by Richard H. Frenkiel, Joel S. Engel, and Philip T. Porter at Bell Labs in the 1960s that larger and robust mobile ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.