Post on 13-Oct-2020
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
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Why a new Wi-Fi standard?
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802.11axWhy Another Wi-Fi Standard?
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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
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New Naming Convention
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• 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.
Wi-Fi evolution
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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…
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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
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Ruckus Beamflex delivers the best radio in the world!
Early adopters
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Stadiums
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Schools
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Wi-Fi 6 explained
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802.11ax Building Blocks & Benefits Summary
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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?
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OFDM
Time taken to deliver
OFDMA
Time taken to deliver
Data package for user 1
Data package for user 2
Data package for user 3
802.11axOFDMA Enables Spectral Efficiency
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Frequency /Subcarriers
Frequency /Subcarriers
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)
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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)
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25%DATA RATE INCREASE
256-QAM 1024-QAM
constellation diagrams
11ac 11ax
Long OFDM symbol
“Useful” Portion of OFDM Symbol
“Useful” Portion of OFDM Symbol
“Useful” Portion of OFDM Symbol
“Useful” Portion of OFDM Symbol
3.2 usOFDM Symbols in 11g/n/ac
“Useful” Portion of OFDM Symbol
12.8 us
“Useful” Portion of OFDM Symbol
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
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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
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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
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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
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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
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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
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• 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?
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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/
Questions & Commentslaurent.Beucher@commscope.com
+33 (0) 786887160
Merci! Thanks!