January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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IEEE 802.11 architecture
The 802.11 protocol represents a family of wireless radio communications based on different modulation techniques in the 2.4 GHz and 5 GHz ISM bands of the unlicensed spectrum. 802.11b and 802.11g reside in the 2.4 GHz band, while 802.11n and 802.11ac open up the 5 GHz band. The last chapter detailed the 2.4 GHz band and the different protocols that reside in that space. Wi-Fi is susceptible to the same noise and interference as Bluetooth and Zigbee and deploys a variety of techniques to ensure robustness and resiliency.
From a stack perspective, the 802.11 protocols reside in the link layer (one and two) of the OSI model, as shown in the following figure:
IEEE 802.11ac Stack.
The stack includes various PHYs from ...
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