wifi 6 evolution or revolution? · • multi-user mimo support • orthogonal frequency division...

WiFi 6 – Evolution or Revolution?

Massimo Mazzeo Ocello

Sr. SE Director Europe

Madrid – November 2019

• Why a new Wi-Fi standard?

• Wi-Fi evolution

• Market drivers

• Wi-Fi 6 explained

• Exploring Ruckus 802.11ax product eco-system

• Solution software compatibility and timeline

• LTE 5G versus 802.11ax

© 2019 CommScope, Inc. | CommScope Internal Use Only2

Why a new Wi-Fi standard?

© 2019 CommScope, Inc. | CommScope Internal Use Only

802.11axWhy Another Wi-Fi Standard?

© 2019 CommScope, Inc.

Goals of the IEEE task group

• Enhance operation in the 2.4 GHz and 5 GHz band

• Increase average throughput per station by at least four times in dense deployment scenarios

• Enhance efficiency in both indoor and outdoorenvironments

• Improves power efficiency in stations• Improve the efficiency of traffic management

Wi-Fi 6Built For Today’s Congested Networks

© 2019 ARRIS Enterprises, LLC. All rights reserved5

New Naming Convention


• Wi-Fi 6 (aka 802.11ax) is the nextevolution of wireless local area network (WLAN) technology

• The name Wi-Fi 6 is part of a new naming convention the Wi-Fi Alliance imposed on Wi-Fi standards to make them more easilyunderstood by Wi-Fi users, making it muchlike the 3G/4G/5G naming convention used by cellular data networks.

https://www.techrepublic.com/article/wi-fi-is-rebranding-itself-heres-how-to-understand-the-new-naming/

Wi-Fi evolution


Wi-Fi Evolution“We need to know where we are coming from to appreciate where we are going”

802.11(Legacy)

802.11b(Legacy)

802.11a(Legacy)

802.11g(Legacy)

802.11n(HT)

802.11ac(VHT)

802.11ax(HE)

Year Ratified 1997 1999 1999 2003 2009 2014End of 2019

(Expected)

Operating Band 2.4 GHz/IR 2.4 GHz 5 GHz 2.4 GHz 2.4/5 GHz 5 GHz 2.4/5/6 GHz

Channel BW 20 MHz 20 MHz 20 MHz 20 MHz 20/40 MHz 20/40/80/160 MHz 20/40/80/160 MHz

Peak PHY Rate 2 Mbps 11 Mbps 54 Mbps 54 Mbps 600 Mbps 6.8 Gbps 10 Gbps

Link Spectral Efficiency 0.1 bps/Hz 0.55 bps/Hz 2.7 bps/Hz 2.7 bps/Hz 15 bps/Hz 42.5 bps/Hz 62.5 bps/Hz

Max # SU Streams 1 1 1 1 4 8 8

Max # MU Streams NA NA NA NA NA 4 (DL only) 8 (UL & DL)

Modulation DSSS, FHSS DSSS, CCK OFDM OFDM OFDM OFDM OFDM, OFDMA

Max Constellation /

Code RateDQPSK CCK 64-QAM, 3/4 64-QAM, 3/4 64-QAM, 5/6 256-QAM, 5/6 1024-QAM, 5/6

Max # OFDM tones NA NA 64 64 128 512 2048

Subcarrier Spacing NA NA 312.5 kHz 312.5 kHz 312.5 kHz 312.5 kHz 78.125 kHz

Wi-Fi Speeds over the Years…


Note: Indicates Physical data rates – actual throughput is ~40-60% less depending on 802.11 technology and other factors

0

2000

4000

6000

8000

10000

12000

11b 11a/g 11n (2x2) 11n (3x3) 11ac (2x2)

11ac (3x3)

11 Mbps 54 Mbps 300 Mbps 450 Mbps 867 Mbps1.3 Gbps

2014Wave 1

1999 1999 / 2003 2009M

bp

s

11ac(4x4 80Mhz)

11ac(4x4 160Mhz)

1.73 Gbps

3.5 Gbps

2015+Wave 2

9.6 Gbps

11ax(8x8 160Mhz)

2018+

Speed is Not the Most Important Issue for WLANs


Ruckus Beamflex delivers the best radio in the world!

Early adopters


Stadiums


Schools


Wi-Fi 6 explained


802.11ax Building Blocks & Benefits Summary


OFDMA

Frequency /Subcarriers

Time

Network Capacity

Power Efficiencies (TWT)

Device Battery Life

1024-QAM

Peak throughout increase

Long OFDM Symbol

Outdoor reliability

Peak throughout increase

BSS Coloring

Network Capacity

Enhanced Wi-Fi Coexistence

MU-MIMO

Network Capacity

OFDMAHow better efficiency is achieved?


OFDM

Time taken to deliver

OFDMA

Time taken to deliver

Data package for user 1



802.11axOFDMA Enables Spectral Efficiency

17



Time Time

User1 User2 User3 User4OFDM OFDMA

• Full Channel Bandwidth allocated to single user• Overhead doesn’t scale with payload size

• Channel BW allocated among multiple users• Overhead amortized across multiple users• Increase in spectral efficiency, Reduced Latency• Supports heterogeneous users – i.e. IM vs Large

downloads

Sub-carriers and Resource Units

• Borrowing from modern LTE terminology, the 802.11ax standard calls the smallest subchannel a Resource Unit (RU)

• AP decides how to allocate the channel, always assigning all available RUs on the downlink.

• Users will have a smaller, but dedicated, sub-channel, thus improving the average throughput per user

Resource Units (RU’s)

2 MHz =>

OFDMA Downlink/Uplink

• AP packs frame from different client intodifferent sub-channels

• Sub-channels can have different widths (RU) and frame at different data-rates

• AP controls transmissions

Downlink OFDMA

Uplink OFDMA

• Clients transmit frames silmutaneously, in different sub-channels

• AP receives and demodulates frames in //

• All clients transmit the full-channel header simultanouesly

• AP makes the decisions on the client sub-channelallocation

SU-MIMO

MU-MIMO

Stream 1

Stream 2

Stream 3

Stream 4

Stream 4

MU-MIMO

Network Capacity

MIMO Evolution Thru The Standards

OFDMA vs MU-MIMOComplementary techniques to serve multiple users concurrently

OFDMA MU-MIMO

Useful when multiple users have small amount of data Useful when multiple users have full buffer traffic

Number of concurrent clients can be as high as 74Number of concurrent clients limited to 8 (introduced in .11ax)

Increase efficiency Increased capacity

Best with small packet Best with large packet

UL OFDMA improves UL rangeNo range improvement (it’s not Beamflex, it’s not even TxBF!)

No sounding overhead for either DL or UL OFDMA Sounding required for DL MU, but not for UL MU

Lower latency Tends to increase latency

Target Wait Time (TWT)


11ax AP

STA1 STA2

BEACON TRIGGER TRIGGERAP

AWAKESTA1

STA2 AWAKE

SLEEP

SLEEP

SLEEP

• Pre-negotiated Wake times between AP and Clients

• Avoids contention on the air among client devices

• Scheduled sleep & power-on (awake) times enables efficient power consumptions for clients

TARGET WAIT TIME

1024 QAMThe greater the SNR, the better the modulation (>=35dB)


25%DATA RATE INCREASE

256-QAM 1024-QAM

constellation diagrams

11ac 11ax

Long OFDM symbol

“Useful” Portion of OFDM Symbol




3.2 usOFDM Symbols in 11g/n/ac


12.8 us


OFDM Symbols in 11ax (Indoor – Increased Throughput Due to Reduced GI Overhead)

OFDM Symbols in 11ax (Outdoor – Increased Multipath Resilience Due to Longer GI)12.8 us

GI (Guard Interval) = Multipath Immunity

BSS Coloring – Spatial re-use


OBSS – OVERLAPPING Basic Service Set (same frequency)

BSS Coloring – Addresses the OBSS problem

AP1

User

1

User

2 AP2

User

A

AP1

User

1

AP2

User

A

User 2 senses signal from bothAP1 & AP2 thus User 2 cannot

transmit till medium is completely clear for both APs

With BSS Coloring (tagging of BSS), User 2 can ignore signal from AP2 BSS

and transmit as soon as it senses medium is clear for AP1

User

2

Backward Compatibility


OFDMAAllocate just the

right BW to clients with less

data

Serve 11ax clients more efficiently and get them off

the medium

More air-time available for non-

11ax clients

MU-MIMO

Concurrent transmission to up to 8 clients

Serve 11ax clients quickly and get

them off the medium

More air-time available for non-

11ax clients

Triggered Access

Scheduled (contention-free) access for 11ax

clients

Serve 11ax clients more efficiently and get them off

the medium

Reduced collision and more air-time

for non-11ax clients

• 11ax AP can serve both 11ax and Legacy (11ac/n/a/b/g) clients

• 11ax and Legacy clients can coexist just like 11ac and 11n clients coexist today

• Both 11ax and non-11ax clients benefit

802.11ax: Wave-1 and Wave-2

• It is established that Wi-Fi 6 will roll out in waves, similar to Wi-Fi 5

• Wave-2 certification ~18-24 months after Wave-1 certification


Here’s a view on the feature/function split:

Wave 1 Wave 2

DL and UL OFDMA UL Spatial MU-MIMO

DL Spatial MU-MIMO Spatial re-use through BSS colouring1

Target Wake Time 160 MHz channelisation

6 GHz Spectrum2

Combined OFDMA and MU-MIMO

Notes:

1. Raw signaling support in Wave-1, but no useful functionality until Wave-2. Be aware of vendor Wave-1 marketing claims!

2. Proposed 5.925–7.125GHz in US; 5.925–6.4257GHz - EU. Harmonization across Europe still in discussion. May be available before Wave-2 if regulators can address spectrum allocations

WiFi6 Client ecosystem already exists todayClient Battery Life improvements due to the TWT feature is a major driving factor for 11ax client adoption

28

- PCMag, Feb 6, 2019- Forbes, Jan 13, 2019

- Intel, Jan 10

Exploring the Ruckus 802.11ax solutions


Ruckus R730High Density 802.11ax-Compliant Indoor Wireless Services Platform with Multi-Gig Backhaul

30

Highlights• Dual band concurrent access point• 2.4 GHz radio: 4x4:4 802.11b/g/n/ax

‒ 1148 Mbps max PHY rate

• 5 GHz radio: 8x8:8 802.11a/n/ac/ax‒ 4800 Mbps max PHY rate

• Multi-User MIMO support• Orthogonal Frequency Division Multiple Access (OFDMA)• BeamFlex+ adaptive antennas with Polarization Diversity (PD-MRC)• Ruckus SmartMesh• Support for onboard IoT radios, BLE & ZigBee (selectable)• Up to 1024 client associations• 1x 1000/2500/5000Base-T, 1x10/100/1000Base-T Ethernet Ports• 802.3at, uPoE, PoH (not 802.3bt), 48VDC input• 1x USB Port• Mounting support for hard wall & ceiling, desktop, Kensington lock

security• Control & Management: ZoneDirector, SmartZone

Available Now


Ruckus R750High Density 802.11ax Indoor Wireless Services Platform with Multi-Gig Backhaul

31

Highlights• Dual band concurrent access point• 2.4 GHz radio: 4x4:4 802.11b/g/n/ax

‒ 1148 Mbps max PHY rate

• 5 GHz radio: 4x4:4 802.11a/n/ac/ax‒ 2400 Mbps max PHY rate

• Multi-User MIMO support• Orthogonal Frequency Division Multiple Access (OFDMA)• 160/80+80 MHz channel support• BeamFlex+ adaptive antennas with Polarization Diversity (PD-MRC)• Ruckus SmartMesh• Support for onboard IoT radios, BLE & ZigBee (selectable)• Up to 1024 client associations• 1x 1000/2500 Base-T, 1x10/100/1000Base-T Ethernet Ports• 802.3bt PoE input, 48VDC input• 1x USB Port• Mounting support for hard wall & ceiling, desktop, Kensington lock

security• Control & Management: ZoneDirector, SmartZone

Available Now


• R750 was THE FIRST commercially availableWi-Fi 6 certified AP in the market.

• R750 is the ONLY Wi-Fi 6 AP from a commercial vendor in the WFA Wi-Fi 6 certification test bed.

The Converged AP: Simplifies The Network

• Converged AP ≠ only built-in Zigbee/BLE

• Converged AP is an end to end architecture that adapts to any new wireless technology

32

Ruckus ICX Multigigabit Ethernet High-Power Switches

33

ICX 7650-48ZPPremium Multigigabit

ICX 7150-48ZPMid-Range Multigigabit

Highest Performance(2.5/5/10 GbE)

Wi-Fi 6 and Beyond(Future-Proof)

✓

24 ports

✓

2 ports

High Performance (2.5 GbE) Wi-Fi 5 and Wi-Fi 6 AP’s ✓

24 ports

✓

16 ports

✓

8 ports

High-Power PoE (90W) Wi-Fi 5 and Wi-Fi 6 AP’s ✓

24 ports

✓

16 ports

✓

4 ports +6 ports w/PoE Overdrive

High Density of AP’s Up to 16-24 AP’s per switch ✓ ✓

Low Density of AP’s 2-4 AP’s per switch ✓

Silent Operation/Compact Footprint

Classroom/Office ✓

ICX 7150-C10ZPCompact Multigigabit

Capability Use Case

802.3bzMulti-Gigabit Infrastructure

Targeted Projects

• Optimized for 802.11ax deployments

• Ultimate future proofing

• Leadership in affordable Multi-gigabit solutions

R730

ICX 7150 Z-Series Switch2.5 GbE

IEEE 802.3bz Standard2.5G over 100m of Cat 5e5G over 100m of Cat 6

2.5/5 GbE

R750

Mobile 5G and 802.11ax, friends or enemies?


Things To Know About..

• New cellular standards = « the end of Wi-Fi !!! »• 5G and Wi-Fi 6 have same foundations and similar

purposes• 5G cost• Wi-Fi 6 for LAN and WAN• 5G will be the designated choice for outdoor

networks• Wi-Fi 6 and 5G are suitable for many industries• Timeline for Wi-Fi 6 and 5G

• Read Massimo blog: https://www.linkedin.com/pulse/wifi-6-5g-world-parallel-convergence-massimo-mazzeo-ocello/

https://www.linkedin.com/pulse/wifi-6-5g-world-parallel-convergence-massimo-mazzeo-ocello/

Questions & [email protected]

+33 (0) 786887160

Merci! Thanks!

mailto:[email protected]

wifi 6 evolution or revolution? · • multi-user mimo support • orthogonal frequency division...

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