List of PPDUs Supported in 802.11ay ======================================== .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is a PPDU in IEEE 802.11ay?** A PPDU is the physical layer frame used to encapsulate MAC layer data for wireless transmission in 802.11ay. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does the PPDU structure differ from 802.11ad?** 802.11ay adds support for higher MIMO streams, longer payloads, and extended headers for enhanced control and beamforming. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are the main components of an 802.11ay PPDU?** It includes a preamble, header fields, training fields, and the payload data, all tailored for 60 GHz operation. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the role of the preamble in the PPDU?** The preamble allows the receiver to synchronize with the incoming signal and estimate the channel before decoding the payload. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11ay support extended preamble formats?** Yes, especially for MIMO and channel bonding scenarios where accurate channel estimation is critical. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does the PPDU handle MIMO in 802.11ay?** The PPDU includes fields and training sequences that support up to 8 MIMO streams using beamforming and spatial multiplexing. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are Training (TRN) fields used for in the PPDU?** TRN fields assist with beamforming by allowing transmitters and receivers to refine beam patterns during transmission. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can PPDUs be aggregated in 802.11ay?** Yes, PPDU aggregation is supported for higher throughput and reduced overhead during burst transmissions. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is there support for channel bonding in PPDUs?** Absolutely, 802.11ay allows bonding of up to 4 channels (totaling 8.64 GHz), and PPDUs are structured accordingly. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are the modulation schemes used in the PPDU payload?** PPDUs use various modulations including BPSK, QPSK, 16-QAM, 64-QAM, and up to 256-QAM for high data rates. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does 802.11ay ensure backward compatibility in PPDU?** It defines legacy-compatible preambles and headers to allow co-existence and interoperability with 802.11ad devices. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What role does the PHY header play in the PPDU?** The PHY header carries information like length, MCS, channel width, and other parameters necessary for correct decoding. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can a single PPDU carry multiple MPDUs?** Yes, through MAC-layer aggregation, multiple MAC Protocol Data Units can be carried in one PPDU for efficiency. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does PPDU design support high-throughput applications?** Large payload support, high-order modulation, and aggregation enable gigabit-level throughput over 60 GHz links. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is beam refinement possible within a single PPDU?** Yes, training sequences embedded in the PPDU allow for in-frame beam tracking and refinement. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the maximum PPDU duration in 802.11ay?** It can support much longer durations than 802.11ad, with limits extended to support wider channels and longer bursts. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are different PPDU types defined in 802.11ay?** Yes, there are different types such as Control, Data, and Training PPDUs, each structured for its specific role. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does error correction work in the PPDU?** Forward Error Correction (FEC) is applied using LDPC or BCC schemes depending on the MCS and configuration. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can PPDUs adapt dynamically to channel conditions?** Yes, modulation and coding can be dynamically adjusted between PPDUs based on link quality and feedback mechanisms. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`Learnings in this section ` * :ref:`Terminology ` * :ref:`Version Info ` * :ref:`ppdu Basic Setup on Ubuntu using IPv4 ` * :ref:`Reference links ` .. _ppdu_step1: .. tab-set:: .. tab-item:: Learnings in this section * In this section, you are going to learn .. _ppdu_step2: .. tab-set:: .. tab-item:: Terminology * Terminology .. _ppdu_step3: .. tab-set:: .. tab-item:: Version Info * Version Info .. _ppdu_step18: .. tab-set:: .. tab-item:: ppdu Basic Setup on Ubuntu using IPv4 * setup .. _ppdu_step17: .. tab-set:: .. tab-item:: Reference links * Reference links