IEEE 802.11ax: An Overview of High Efficiency Wi-Fi (Wi-Fi 6), Parts 1 & 2

  • Online

IEEE Standard 802.11ax is the latest step in a journey of continuous innovation in the wireless local area networks (LAN) standards and is the underlying technology of the latest Wi-Fi 6 products. Unlike previous amendments (e.g., 802.11ac, 802.11n) which were focused mainly on increasing the peak throughput, IEEE 802.11ax focused on achieving higher efficiency (HE) and improving metrics that reflect the user experience, such as average throughput per station. This was achieved with better physical layer efficiency and spectrum utilization, flexible multi-access and scheduled transmission schemes, increasing the spatial reuse, and improving interference management between neighboring networks, particularly in dense environments.

This two-course program provides an overview of the features and optimizations introduced by IEEE 802.11ax to the physical (PHY) and medium access control (MAC) layers, which lead to these improvements.


Two-Day Live Virtual Training Session

Day 1: Tuesday, 21 February 2023 @ 12 - 3 PM ET

Day 2: Wednesday, 22 February 2023 @ 12 -3 PM ET

Purchase this course program by 17 February 2023 to join IEEE and the program instructors for a special two-day live virtual training session. The sessions will offer the opportunity to ask questions and to interact with the instructors in a virtual format.

Following the live sessions, purchasers of the program will have the opportunity to access the on demand version of the course program.

 Outline and Objectives

Day 1 - PHY Layer Focus

Tuesday, 21 February 2023 @ 12 - 3 PM ET


  1. Background on IEEE 802.11ax
  2. Main PHY features in IEEE 802.11ax (e.g., band support, OFDMA, MU-MIMO,  per link enhancements)
  3. Numerology and tone plan (new numerology,  tone plan, resource unit for OFDMA)
  4. PPDU formats (four Physical Layer packet formats)
  5. Miscellaneous topics in PHY operation (triggered operation, sounding sequence, and preamble puncturing)

After completing this training session, the learner can expect to understand: 

  • Main PHY features introduced in IEEE 802.11ax and their benefits
  • Details of IEEE 802.11ax PHY numerology and tone plan for each bandwidth  
  • The four physical layer packet formats and their usage
  • Important topics in the IEEE 802.11ax PHY operation including sounding sequences, preamble puncturing operation and spatial uses concepts

Day 2 - MAC Layer Focus

Wednesday, 22 February 2023 @ 12 - 3 PM ET


  1. Overview of the the main MAC features in IEEE 802.11ax
  2. MAC support for multi-user operation (UL/DL OFDMA/MIMO)
  3. Channel Access Enhancements
  4. Power Save protocols
  5. Frame Aggregation Enhancements
  6. Operation in the 6 GHz band

After completing this training session, the learner can expect to understand:

  • Main MAC features introduced in IEEE 802.11ax and their benefits
  • MAC support for downlink and uplink multi-user operation (trigger frame variants, feedback mechanisms, acknowledgment sequences, etc.)
  • Use of BSS color for differentiating intra-BSS vs. inter-BSS PPDUs, two NAV operation, spatial reuse modes, and details for MU EDCA operation
  • Negotiation and utilization of target wake times (individual and broadcast) and operation mode indication
  • Dynamic fragmentation, multi-TID aggregation and variable size BlockAck frames
  • Enhancements to active/passive scanning and network operation in the 6 GHz band
  • Extending the range of a BSS and use of TXOP-based RTS/CTS exchanges


Bin Tian

Bin Tian is a Senior Director of Technology in Wireless R&D at Qualcomm, Inc.  He currently leads the Wi-Fi physical layer system team, which is responsible for R&D, prototyping and standardization of Wi-Fi technology and solutions.  Since 2012, he has contributed significantly to different generations of IEEE 802.11 standards including 802.11ah (Sub-1GHz), 802.11ax (Wi-Fi 6), 802.11ba (wake-up radio), 802.11be (WiFi7), and more. Before 2012, he led and contributed to many R&D projects in Qualcomm on terrestrial and satellite communication systems. He holds around 300 granted or pending US patents. Bin Tian received his Ph.D. degree in Electrical Engineering for Colorado State University and holds M.Sc. and B.Sc. degree in EE from Tsinghua University, China.

Alfred Asterjadhi

Alfred Asterjadhi is a Systems Engineer in Wireless R&D at Qualcomm, Inc. His focus is on the design, standardization, and performance evaluation of MAC protocols in wireless systems with a special emphasis on increasing efficiency, scalability and reducing power consumption in wireless networks. He is the Chair of IEEE 802.11be and has served as the Vice Chair of IEEE 802.11ax, and Vice Chair and Technical Editor of IEEE 802.11ah. He has made significant technical contributions to these amendments in both standardization and certification of Wi-Fi interoperability. He has authored and coauthored multiple conference and journal papers in wireless communications, a book in underwater acoustic networking, and is the holder of several patents in wireless communications. Alfred Asterjadhi received his Ph.D. degree in Information Engineering, the B.Sc. and the M.Sc. degrees in Telecommunications Engineering from the University of Padova, Italy.

Publication Year: 2023

IEEE 802.11ax: An Overview of High Efficiency Wi-Fi (Wi-Fi 6), Parts 1 & 2
  • Course Provider: Educational Activities
  • Course Number: EDP687
  • Duration (Hours): 6
  • Credits: None