Hello, everyone!
Today, I would like to share a post on the novel features an open challenges of the IEEE 802.11ax amendment.
In addition to the problems that were considered during the creation of the IEEE 802.11ax amendment, next-generation WLANs will need to provide several additional features beyond raw packet transmission and receiving.
A rapid, efficient, and reliable handoff between APs in the same administration domain, device-to-device communication (D2D), and multi-AP network collaboration are all instances.
Fast Initial Link Setup is another name for the IEEE 802.11ai amendment. Its goal is to accomplish a handoff in under 100 milliseconds, which includes new AP discovery, user authentication, and configuration. We can avoid using the AP as a relay by using D2D communication, which improves overall efficiency by reducing the amount of packet transmissions needed.
Lastly, network function virtualization offers a new layer to the administration of numerous APs, which can significantly improve the user experience in congested circumstances.
PHY, MAC, Multi-user, and Spatial Reuse are the four areas in which the IEEE 801.11ax Task Group works.
Physical layer:
The IEEE 802.11ax PHY layer is a step forward from the IEEE 802.11ac PHY layer. The extensions required to handle multi-user MU-MIMO and OFDMA transmissions, as well as Dynamic CCA, pose issues in the design of the IEEE 802.11ax PHY layer. Improvements in acceptable modulation and channel coding methodologies will very certainly be studied as well, allowing for larger transmission rates at lower SNR values.
For instance, instead of standard convolutional codes, IEEE 802.11ax may use LDPC (Low-Density Parity Check) coding, which is optional in IEEE 802.11ac and provides a coding gain of 1-2 dB. In addition, the PHY layer may incorporate certain functionality to facilitate the adoption of Hybrid ARQ methods to enhance packet retransmission efficiency.
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