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CTS 159: Wi-Fi 6 (802.11ax) Overview
In this episode, we provide an overview of many parts contained in 802.11ax. It’s meant to provide a quick update as to what is coming in 802.11ax. You can expect that we will cover these items in future episodes.
CTS 160: 802.11ax OFDMA Resource Units
A new way of handling transmissions for Wi-Fi is by turning OFDM into multi-user by using OFDMA. It’s borrowed from the cellular world and adds efficiency to Wi-Fi. This is one of the fundamental concepts to understand for 802.11ax.
CTS 161: 802.11ax BSS Coloring
Another new concept to 802.11ax is this idea of using a BSS Color. It’s used for dense environments and allows for OBSS. Kind of looks like RXSOP. There’s actually no colors used. It’s just 1s and 0s.
CTS 162: 802.11ax OFDMA Subcarriers
With OFDMA, the subcarriers are much different compared to 802.11ac. There are a lot more subcarriers for multi-user OFDM. More transmissions to send and receive across a channel width. François goes into the details of subcarriers for OFDMA for this episode.
CTS 164: 802.11ax Target Wake Time
All the current power saving mechanisms defined today remain usable with ax. In addition, the 802.11ax draft defines a new mechanism called Target Wake Time or TWT. Target wake time (TWT) is used to help minimize contention between clients and reduce the amount of time a client in power save mode to be awake.
CTS 166: 802.11ax HE Channel Access
It’s not all-new ways of thinking about channel access but 802.11ax does add some complexity. We are now dealing with multi-access, TXOP, BSS coloring which complicates the channel access process.
We have more episodes in the hopper… reading the draft takes time. Interpreting and understanding takes longer…