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Exploring communications technology
Exploring communications technology

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4.8 WiFi multiple access

Although WiFi uses OFDM, making it similar in some respects to 4G, the method of providing multiple access to the radio channel is very different from 4G’s. WiFi doesn’t use resource blocks. Also, the two directions of data traffic (towards and away from the user) are not differentiated by frequency band. The following activity shows how multiple access is provided in WiFi.

Activity 4.4 Animation

The following animation will explain how WiFi allocates access to the radio channel among its various users. Open it by clicking on the image or ‘View’ link below, then watch and listen to the six sections of the animation.

Interactive feature not available in single page view (see it in standard view).