Wi-Fi 7 In Depth

Your guide to mastering Wi-Fi 7, the 802.11be protocol, and their deployment

AvJerome Henry,Brian Hart

Häftad, Engelska, 2025

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Beskrivning

An essential guide for networking professionals responsible for implementing Wi-Fi 7

Join wireless networking experts Jerome Henry, Brian Hart, Binita Gupta, and Malcolm Smith on this deep dive into Wi-Fi 7 and 802.11be. The authors explore how to design and optimize your network to fully leverage Wi-Fi 7's new capabilities.

You will learn in detail the inner workings of Wi-Fi 7 improvements like rTWT, puncturing, triggered uplink access, and SCS QC. You will explore the new possibilities of multi-link operations and learn why clients will come in five possible MLO modes that dramatically change the expectations you can have for their performances. You’ll gain practical, real-world insights into protocol implementation and its effects on cell design, roaming efficiency, and overall network performance.

This book is an invaluable resource for anyone who designs, manages, and optimizes wireless networks or works with 802.11, from network architects and wireless network administrators to network engineers and anyone whose job includes the need to face the Wi-Fi 7 wave or understand 802.11be and its challenges in depth.

Whether you are new to IEEE 802.11 standards or looking to deepen your understanding of the latest wireless networking advancements, this book gives you the knowledge and expertise to stay ahead in the evolving Wi-Fi technology landscape.

Includes a foreword by Matt MacPherson (CTO of Wireless, Cisco Systems)

In this book, you will:

Understand the foundational concepts of Wi-Fi and the 802.11be protocol
Explore the challenges and balance of backward compatibility in Wi-Fi 7 development
Learn about the enhancements introduced in Wi-Fi 6 and Wi-Fi 6E and their impact on 802.11be
Explore the enhancements in transmission and reception techniques, channel structure and multi-user access management
Learn about Multi-Link Operation (MLO) and its five different modes
Understand Quality of Service (QoS) mechanisms and priority scheduling
Examine site survey and network planning considerations specific to Wi-Fi 7 deployments

Produktinformation

Utgivningsdatum:2025-02-26
Mått:179 x 231 x 21 mm
Vikt:617 g
Format:Häftad
Språk:Engelska
Antal sidor:384
Upplaga:1
Förlag:Pearson Education
ISBN:9780135323618

Utforska kategorier

Mer om författaren

Jerome Henry is a Distinguished Engineer in the Office of the Wireless CTO at Cisco Systems. He is a certified wireless networking expert (CWNE No. 45), Wireless CCIE (No. 24750), and has authored multiple books and video courses focusing on wireless technologies. Brian Hart is a Principal Engineer in the Cisco Wireless group. He has been an IEEE 802.11 Working Group voting member since 2006 and has made hundreds of contributions across tens of groups, including 802.11ac, 802.11ax and 802.11be. Binita Gupta is a Senior Technical Leader in Wireless Engineering group at Cisco Systems. She has more than 20 years of experience leading technology development of wireless systems, products, and services across Wi-Fi, 5G, private networks and IoT. Malcolm Smith is a Principal Engineer at Cisco Systems and serves as a wireless advisor in Cisco’s Networking CTO office. Malcolm leads Wi-Fi university research and related strategy, innovation and partner ecosystem development.

Innehållsförteckning

Foreword by Matt MacPhersonPreface Chapter 1: Wi-Fi Fundamentals.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Evolution of 802.11 Standards.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2The 802.11 Architecture.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4The 802.11 Connection Process.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Channel Access Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Chapter 2: Reaching the Limits of Traditional Wi-Fi .. . . . . . . . . . . . . . . . . . . . . . . 26The Burden of Roaming.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A Limited QoS Scheme.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Coexistence Challenges.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37802.11 Security.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Chapter 3: Building on the Wi-Fi 6 Revolution.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Channel Efficiency Improvements.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Functional Improvements.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Wi-Fi in the 6 GHz Band.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Chapter 4: The Main Ideas in 802.11be and Wi-Fi 7 . . . . . . . . . . . . . . . . . . . . . . . . 98Pressure from the Market and Previous Generations’ Limitations. . . . . . . . . . . . . . . . . 99Wi-Fi 7 Expected Challenges.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Chapter 5: EHT Physical Layer Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . 134Wi-Fi7 in a Nutshell.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134Purposes and Opportunities for the Physical Layer.. . . . . . . . . . . . . . . . . . . . . . . . . . . 136PPDU Formats and Their Fields.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139Construction of the Data Field.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144Major Wi-Fi 7 PHY Innovations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149Minor Wi-Fi 7 PHY Innovations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169PHY Capability Signaling.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174 Chapter 6: EHT MAC Enhancements for Multi-Link Operation . . . . . . . . . . . . . . 176MLO Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176MLD Discovery and Association. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182MLD Data Plane.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194MLO Modes.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198ML Reconfiguration.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207Link Management.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213Other MLO Enhancements.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218Summary.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 Chapter 7: EHT MAC Operation and Key Features . . . . . . . . . . . . . . . . . . . . . . . 222EHT BSS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222Enhanced SCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233Restricted TWT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245Triggered TXOP Sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252EPCS Priority Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257Wi-Fi 7 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265 Chapter 8: Wi-Fi 7 Network Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268WLAN Design Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268Designing for Wi-Fi 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296 Chapter 9: Future Directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298Wi-Fi 8 Directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298Localization and Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313A Privacy-Respecting 802.11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340