List of PPDUs Supported in 802.11ai
What is a PPDU in IEEE 802.11ai?
PPDU (Physical Layer Protocol Data Unit) is the unit of data transmitted over the wireless medium at the PHY layer.
Does 802.11ai introduce a new PPDU format?
No, 802.11ai uses standard PPDU formats defined by underlying PHY layers like 802.11ac or 802.11ax.
What types of data are carried within the 802.11ai PPDU?
The PPDU carries management, control, and data frames including 802.11ai-specific management enhancements.
How does 802.11ai ensure PPDU compatibility with legacy devices?
It maintains PPDU structure consistency, allowing devices without 802.11ai support to interoperate without disruption.
What PHY layers does 802.11ai PPDU operate over?
802.11ai PPDUs operate over PHY layers like 802.11ac, 802.11ax, and others as defined by the deployment.
Does 802.11ai modify the preamble of PPDU frames?
No, the preamble remains consistent with base 802.11 standards to ensure synchronization and interoperability.
What role does PPDU play in client roaming in 802.11ai?
PPDU carries BSS Transition Management frames to assist clients with seamless roaming.
How does 802.11ai utilize PPDU for power saving mechanisms?
Network-assisted power save frames are transmitted within the PPDU to coordinate client wake/sleep cycles.
Is there any PHY layer change required to support 802.11ai PPDUs?
No, all enhancements are implemented at MAC and higher layers; PHY layer remains unchanged.
How does 802.11ai PPDU support enhanced network management?
By carrying management and control frames with added information elements for better client and AP coordination.
Can PPDU frame length vary in 802.11ai?
Yes, frame length varies depending on the payload and management frame sizes.
How does 802.11ai ensure low latency in PPDU transmissions?
Through efficient scheduling and management of transmission timings at MAC and PHY layers.
What is the impact of PPDU structure on network scalability in 802.11ai?
Standard PPDU formats allow scalable deployment without complex PHY modifications.
Are there security implications in 802.11ai PPDU frames?
Security is maintained as per standard 802.11 mechanisms, with added management frames secured accordingly.
How does PPDU facilitate communication between APs and clients in 802.11ai?
It encapsulates all frame types necessary for network coordination, client management, and data exchange.
Can PPDU carry multiple frame types simultaneously in 802.11ai?
Each PPDU typically carries one MAC frame but can carry different frame types across transmissions.
How is PPDU timing coordinated in 802.11ai?
Through MAC layer timing protocols and PHY synchronization to ensure proper frame exchange.
Where can I find technical details on 802.11ai PPDU formats?
Details are available in the IEEE 802.11ai standard and PHY specification documents.
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