(NOTE : I got most of these information from Ref.
Just to give you more practical insight on this motivation, I would compare 802.11n (the most advanced technology before 802.11ac) and 802.11ac with the respect t the features/technologies listed above. With the list in mind, if you try to correlate each of these technologies to each items of specification of 802.11ac, it will be much easier to get the big picture or motivation of those specification. Some of the technologies for this evolution can be listed as follows Then what is the technical strategy to achieve this high throughput ? Overall strategy is also same as other technology (If you have seen the evolution process of celluar technology (e.g, WCDMA -> HSPA -> DC HSPA or LTE -> LTE MIMO -> Carrier Aggregation etc), you will easily understand the strategy. I am pretty sure that you will see another technology targeted for even higher throughput than 802.11ac (We are already hearing of 802.11ad). Channel measurement (sounding) proceduresĪs in almost every evolution of every communication technology (except IoT), the major motivation of 802.11ac is to achieve much higher throughput than the previous highest throughput technology (802.11n in this case).If you are not familiar with WLAN frame structure and basic operations I would recommend you to go through WLAN Frame structure and WLAN protocol page first. These detailed changes will be summarized in each corresponding sections. Most of these main characteristics would lead to some addition / modification of PLDC and MAC frame structure. Following is the list of the main characteristics of 802.11ac.
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