wi-fi 6: reinventing the mobile experience · deployments •802.11ax and wi-fi 6 are...

Patrick CroakSystems Architect CCIE# 34712March 10th, 2020

Wi-Fi 6: Reinventing the Mobile Experience

© 2019 Cisco and/or its affiliates. All rights reserved. Cisco Confidential

Agenda

What is Wi-Fi 6?

New features & improvements

Wi-Fi 6 and 5G Use Cases

Cisco Enterprise Networking innovations

Key takeaways, Q & A


What is Wi-Fi 6 (or 11ax)?

19992003

2004

2009

2013

2019

11B11G

11A/G

11N

11AC

11AX

High Efficiency4x CapacityIoT Scale• Cellular like Determinism

for high quality services• Higher power efficiency to

accelerate IoT adoption• Extended outdoor range• Better app. performance

in high density deployments

• 802.11ax and Wi-Fi 6 are interchangeable engineering and marketing terms that have the same meaning

• You may also sometimes see the term “high-efficiency wireless” or “HEW” used

Wi-Fi 1Wi-Fi 2

Wi-Fi 3

Wi-Fi 4

Wi-Fi 5

Wi-Fi 6

IEEE 802.11ax Ratification now due Q3 2020WFA Wi-Fi 6 certification in process


Wi-Fi 6 – 802.11ax Enhancements

For your reference

Uplink and Downlink Orthogonal Frequency Division Multiple Access (OFDMA): Increases network efficiency and lowers latency for high demand environments

Multi-User Multiple Input Multiple Output (MU-MIMO): allows more data to be transferred at once and enables an access point to transmit to a larger number of concurrent clients at once

Parallel processing: enables greater capacity by allowing MU-MIMO and OFDMA to function in parallel and then adding channel reuse with BSS coloring

1024 Quadrature Amplitude Modulation Mode (1024-QAM): increases throughput in Wi-Fi devices by encoding more data in the same amount of spectrum + 160MHz channels

Target Wake Time (TWT): significantly improves battery life in Wi-Fi devices, such as Internet of Things (IoT) devices

Packet latencyimprovements

Channel ReuseWith BSS Color

Parallel transmissions

Faster Speed moreRadios and 1024 QAM

Better Battery Life

Wi-Fi 5 was about “VHT” Very High Throughput Wi-Fi 6 is about HIGH EFFICIENCY WIRELESS “HEW”


• .11ax High Efficiency Wireless (HEW) is all about optimizing the time spend “ON THE AIR” and how much information is on the air during any given Micro Second “uS”

• Four things determine Air time efficiency 1. Data rate (Modulation density) or QAM -

(how many Bit’s per Radio Symbol) 64 QAM is more robust but 1024 QAM is a lot faster

2. Number of spatial streams and spatial reuse (introduction of OFDMA and Resource Units) and UL/DL MU-MIMO

3. Channel bandwidth – How Many frequencies can we modulate at one time

4. Protocol overhead – Preamble/Ack/BA, Guard Interval “GI” etc.

802.11ax is all about high efficiency wirelessThese improvements are Wi-Fi 6 enhancements to make every microsecond “On THE AIR” matter.

Note: Channel Bonding reduces range as the power is spread out with each additional 20 MHz adding a 3 dB penalty in SNR and the greater the QAM the harder it is for the receiver to decode therefore it is more sensitive to noise.

Modulation density gains

802.11ax10b/symbol

802.11ac8b/symbol

802.11agn6b/symbol

64 QAM 256 QAM 1024 QAM

Wi-Fi channel width20 MHz40 MHz80 MHz

160 MHz


OFDMA – Using Subcarriers more efficientlyMaximizing Client Count – Lowering Latency

t3 t7t6t5t1 t2 t4 t8

OFDMAt3 t7t6t5t1 t2 t4 t8

OFDM

Each subcarrier is a transport - Latency goes up when subcarriers go out “half empty”… OFDMA solves this by allowing multi-user packets to go out on one subcarrier

• Each User gets 1 time slot – whole channel bandwidth

• Each User must wait t8 before Next TX_op• As more clients Join the cell, Latency –

Jitter Increases• QOS only manages TXop – someone has to wait

• Multi user Packet makes flight more efficient• Also provides much more regular

and consistent TX_op• Deterministic nature – miss this truck – no

worries hear comes another “meaning the truck” is always leaving “full”… net result is lower latency

User 5 - Data

User 1 - Telemetry

User 2 - Voip

User 3 - Video

User 4 - Voip

User 7 - Data

User 6 - IoT

User 8 - Voip


802.11ax (OFDMA) provides determinism at scale:Enabling high-quality voice/video/data services cost effectively

Consistent DATA throughput

Source: Cisco sponsored research

Wi-Fi 6 (ax)Wi-Fi 5 (ac)CBP*

*Cisco Best Practice

Client Count

Late

ncy

(ms)

Source: Cisco sponsored research

Linear VOICE delay

Wi-Fi 6 (ax)Wi-Fi 5 (ac)

Thro

ughp

ut (M

bps)

Client Count

Wi-Fi 6 is not only cost-effective & ubiquitous but is now capable of delivering SLAs


Wi-Fi 6 enhancements to Multi-user MIMOThe previous slides for .11acW2 holds true for .11ax However there are NEW supported features:

• MU-MIMO is now supported in Downlink

• 8 MU-MIMO transmissions (users in a group) up from 4

• AP calculates a channel matrix for each user and simultaneous steer beams to different users (creating groups and managing)

• Each MU-MIMO transmission may have its own MCS rate

• Larger RU frames 106 and above are used for MU-MIMO

• MU and SU-MIMO is decided by AP w/MU- favoring larger packets

Improves latency


BSS Coloring – Spatial reuse and addressing interference Basic service set “BSS” and overlapping basic service set “OBSS”

• BSS Color – All devices within a BSS send the same value (color), which will be different than other nearby BSSs (or OBSSs)• Each BSS (AP) uses a different “color” (6 bits in the preamble)• Each user (station) learns its BSS color upon association,

allowing it to identify other BSS’s as OBSS• Stations detecting the same BSS color (intra-BSS) use a lower

RSSI threshold for deferral which reduces Intra BSS collisions• Stations detecting a different BSS color (Inter-BSS) use a

higher RSSI threshold, which allows more simultaneous transmissions

• OBSS Packet detection is dynamic and managed by the AP • If a station reduces its TX power, the device can raise its

inter-BSS CCA thresholds and transmit• TX Power reduction is based on sounding packets• Effectively RF locating the client within the cell• The closer the client is to the AP,

THE LOWER it’s transmitted power can be

Benefit - Overcomes the problem of Clear channel assessment limitations

BSS OBSS


Support a high density of IoTdevices

• Asset tracking, Context based services, Electronic Payments

• IT & IOT Integration, Automation

• Hospitality, Retail, Smart Buildings

Ultra reliable and low latency applications

• Process automation, Automatic Guided Vehicles, Real-time analytics

• Manufacturing, Remote healthcare, Warehouses

Higher performance to mobile devices

• 50 Mbps or higher to every user in dense environments

• Enhanced video (4K, 8K), AR/VR, Immersion Experience

• Next gen e-classrooms, Stadiums, Modern Workspaces

Use cases

Enhanced mobile broadband Massive scale IOT Mission critical services


IoT benefits using Wi-Fi 6

2.4 GHz No longer a junk band – It simply needs to work

More IoT devices coming on line everyday – Strong need for 2.4 GHz• Superior battery life for IoT and mobile devices – Using target wake time

• Parallel processing for spectrum efficiency MU-MIMO (Uplink and Downlink)

• Small packet aggregation (using OFDMA) for reduced latency

• Longer guard interval for greater range outdoor links

• BSS Coloring helps increase channel reuse

• Better spectrum coexistence with other technologies e.g. Bluetooth, Zigbee


Target wake time – Putting devices to sleep For your reference

• With Target Wake Time (TWT), the AP can schedule phones and IoT devices sleep for long durations (up to 5 years) and then wake the individual device up.

• Devices can be configured to wake up as a group to communicate at the same time sharing the channel for increased network capacity and reduced battery drain.

• Use of BSS Color field and UL/DL flag in preamble to enable intra PPDU power Saving


In this upcoming world Wi-Fi 6 and 5G complementary throughout the day, frictionless & unnoticeable….

Wi-Fi 6 5G Wi-Fi 6 5G Wi-Fi 6


Home Driving Corporate Office

Customer call in the car

Visit a branch office

Coffee Shop

Wi-Fi 6

Hotel

Wi-Fi 6


Cisco is excited about 5G & Wi-Fi 6, and the possibilities they hold…

The world has two dominant wireless access ecosystems in transformation today, Wi-Fi 6 and 5G, which are built on the same wireless foundation

Higher data rates& lower latency Increase in network capacity IoT at scale

Support new applications and outcomes

Seamless Connectivity

Explosion of devices including IOT


But Wi-Fi 6 is happening now, and will enable Enterprise use cases much sooner

2023 and beyond

Fixed Wireless begins

Fixed Wireless in

curb to home/ SMBs (5G

WAN)

Massive mainstream

5G NR roll-outs

Carrier rollout in

select cities in US, Japan,

China

Ubiquitous in all major

cities in US, EMEA, Japan,

China

First clients

First APs

Full-featured APs

Massive proliferation

of clients

Wi-Fi 6

5G

2018 20202019 2021 2022

Timeline to reach technology & ecosystem maturity


5G and Wi-Fi 6 are complementary, but Wi-Fi 6 will continue to be preferred & primary wireless access in the Enterprise

New wirelesstechnology

Target applications

Data and experienceownership Enterprise owned

Outdoor IndoorCoverage Capacity, density

Outdoor + Indoor

Wi-Fi 6(802.11ax)

5G

Carrier managed

Optimization for

Transportation Outdoor Wireless AR/VR Apps Massive IoT Indoor Enterprise Retail

© 2019 Cisco and/or its affiliates. All rights reserved. Cisco Confidential802.11ax/Wi-Fi 6 is much more than speeds and feeds

Wi-Fi 6 provides plenty of advantages nowBuilt on the same wireless foundation as 5G

Enable next generation applications such as 4K/8K & AR/VR Video

3-4x more throughput than 802.11ac

Reduced latency and greater reliability with hundred’s of devices per AP

Up to 3x more power efficient at conserving battery life

Higher Data-rates Increase in network capacity IoT at scale Faster Device

Adoption

Support new applications &

outcomes


outcomes


outcomes


outcomes


Leading the industry with Wi-Fi innovationsFor every major change in WLAN over the last 20+ years

1999 2011 2014 2016 2018 2019

Autonomous access

Controller and coordinated

Access Points

Cisco CleanAir®: Interference detection

and mitigation

Connected mobile

experiences

Application visibility

and control

Hyperlocation

Flexible Radio Assignment (FRA)

(dual 5 GHz)

Software-defined access

Intelligent capture and real-time

telemetry

802.11b/g 802.11n 802.11ac Wave 1 802.11ac Wave 2

Aironet® 3500 Series

Aironet 3600 Series

Aironet 3800 Series

Aironet 4800

Aironet 3700 Series

Wi-Fi 6

Catalyst 9100

IoT Radios (BLE, Zigbee, Thread)

Cisco RF ASICSeamless Off channel

Scanning


Why the Cisco RF ASIC?Cisco Secret Sauce-meets- Portable Feature Parity

Cisco RF ASIC

• Cisco Custom RF ASIC• 3 independent RF SubSystems

• 1x Dual Band 1x2 MIMO TRX• 1x Dual Band Observation Receiver RO1• 1x High Band Observation Receiver RO2

• Secret Sauce (SaGE) and a VSPA (Vector Signal Processing Accelerator)

• Custom AGC/Discreet Oscillators added for Cisco purposes (DFS/CleanAir) during design Cisco custom silicon

Real-Time spectrum analysis

Cisco RF ASIC


• We setup a mixture of 100 clients, representative of the real world• 5x MacBook Pro 11n (3SS)• 40x Intel AX200 Chipset 11ax (2SS)• 15x MacBook Pro 11ac (3SS)• 20x MacBook Air 11ac (2SS)• 20x Dell 6430 w/ Intel 7260 11ac (2SS)

• 80/20 Mix between 5 GHz and 2.4 GHz

• Clients were spread around the AP from 10’ (3m) to 45’ (13.7m)

• IxChariot tool used to generate traffic from a wired endpoint.

High Client Density 11ax/11ac Performance Setup


0

100

200

300

400

500

600

700

10 20 30 40 50 60 70 80 90 100

Thro

ughp

ut (M

bps)

Clients

Multi-Client Performance

Cisco 9115Cisco 9120Cisco 2800Cisco 1850Cisco 1840

High-Density Client Test- ResultsCisco Wi-Fi 6 vs Cisco Wave 2 APs

Cisco 9100 series APs has clear advantage over Cisco Wave 2 APs

Cisco 9120AX overperforms Cisco

AP2800 by 25%


Cisco partners with major manufacturers to provide the best device experience

• Client & network interoperability

• Up to 4x performance increase

• Consistent • Improved power efficiency

• Client network analytics providing a client-centric view to DNAC Assurance

• Improve Wi-Fi roaming• Performance: 5x faster

Wi-Fi & cellular handoff

• Enable partners to integrate with Cisco autonomously

• Promote standards+ features across multiple client devices

Best Wi-Fi 6 standards solution

Differentiation through standards +

Open Partner Framework


9100 provides seamless end user experiencePowered by Cisco Device Eco System with Apple and Samsung, etc.

EmployeeMary Jane

Go to summary of use case

Cisco Wi-Fi 6 AP recognizes the devices by Apple and Samsung and enables fast roaming to the optimal Access Point

Cisco Wi-Fi 6 AP runs interop tests with Apple, Samsung, Intel, and Microsoft to ensure Wi-Fi features run seamlessly on devices

Cisco Wi-Fi 6 AP on Apple devices prioritizes business apps by pushing a QoS profile to a particular group.i.e. Employees, Guests, etc.

Business Conferencing

Business Email

Business Messenger

Fast Roaming Wi-Fi 6 Interoperability Fast Lane

Workspace use case


Wi-Fi 6 Assurance differentiationDNAC Assisted Migration

- DNAC to provide trends and insights on Wi-Fi 6 clients, h/w and s/w readiness

- Provide recommendations for AP refresh and which site customer should refresh first

Wi-Fi 6 Benefits

Cisco Wi-Fi 6 Innovations

- Dual DFS- Zero Wait DFS- Quantify benefits of serving radio not going

off-channel

Client Troubleshooting

- Client Interoperability- 11ax client connectivity issue trends - Insights on 11ax specific failures

- VIP Full Packet Capture for OFDMA and MU-MIMO packets

- Demonstrate Spectrum Efficiency:Higher AirTime EfficiencyLower Channel UtilizationLower Application Latency

- TWT Savings


Introducing Cisco’s next generation wireless stack

Catalyst 9100 Access Points

Catalyst 9800 Wireless Controllers

Cisco DNA Assurance Cisco DNA Spaces

Resilient | Secure | Intelligent

With innovations in performance, security and analytics


Next-generation Cisco Catalyst wireless accessEcosystem partnerships with Apple, Samsung, Intel, and Microsoft

Intelligent

• Enhanced analytics with Cisco DNA

• IOx infra support to host IOT applications

• Deploy in infrastructure of choice and cloud of choice

Secure

• Detect encrypted threats with Encrypted Traffic Analytics (ETA)

• Multi-lingual AP with RF snapshots

• WPA3, Trustworthy systems

Resilient

• Deterministic capacity at scale• Superior battery life for IoT and

mobile devices• Software updates with

minimal disruption

Innovation Beyond the Standard

Extending Cisco’s intent-based network Leadership in RF innovation

Powered by Cisco IOS® XEOpen and programmable

Powered by Wi-Fi 6 technologySuperior RF experience

Cisco Catalyst 9100Access Points

Cisco Catalyst 9800 Series Wireless Controllers


© 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public

Automation Security AnalyticsBuilt for intent-based networking

The Full Experience End to End

Access SwitchesAccess Points Core Switches Wireless Controller

9200/9300/9400Catalyst Catalyst

9500/9600 SeriesCatalyst

9800 SeriesCatalyst

9100 Series

Most comprehensive mGig portfolio

Wi-Fi 6

Campus Optimized 25G/40G/100G

Industry’s only modular WLC with 40G/100G

uplinks

Wi-Fi 6, 802.3bt Ready

48P 5G + 25G/40G uplinks

Wi-Fi 6

Wi-Fi 6

Wi-Fi 6

End-to-end Wi-Fi 6 leadership enabling next-generation mobility


© 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public

New Cisco Catalyst 9100 Series Access Points

Cisco DNA Assurance withiCAP

Integrated or external antenna SKUsBluetooth 5 USB

Mission critical and Scale deploymentIdeal for small to medium-sized deployments

9117AX• 8x8 + 4x4• MU-MIMO, OFDMA (only DL)• Spectrum intelligence• 1 x 5 mGig• TWT• Integrated Antenna only

9115AX• 4x4 + 4x4• MU-MIMO, OFDMA• Spectrum Intelligence• 1 x 2.5 mGig• TWT

9130AX• 8x8 + 4x4 ; 4x4 + 4x4 + 4x4• Tri-radio: Dual 5GHz + 2.4GHz• Cisco RF ASIC for Next gen CleanAir• Full iCap with data packets• Dual 5GHz, Next Gen HDX• RF signature capture, TWT• Smart Antennas supporting up to 8x8• IoT ready (Zigbee, Bluetooth)• Application Hosting• 1 x 5 mGig• First 8x8 AP with external antennas

Powered by Cisco RF ASIC

Powered by Cisco RF ASIC

New

9120AX• 4x4 + 4x4• Cisco RF ASIC for Next gen CleanAir• Dual 5GHz, Next Gen HDX• RF signature capture• IoT ready (Zigbee, Bluetooth)• Application Hosting• 1 x 2.5 mGig• TWT

NEW


Why Enterprise customers need Wi-Fi 6?

Consistent ExperienceEffective EngagementEnd to End Security

User ExperienceAvailability

Relevant ContentSecure Onboarding

IT BenefitsAssurance & Automation

Location InsightsUnified Policy


• Wi-Fi 6 is available now!

• Improved efficiency ideal for high density environments• Enhancements for IoT deployments

• Wi-Fi 6 and 5G will co-exist for different use cases

• Any questions?

Summary

wi-fi 6: reinventing the mobile experience · deployments •802.11ax and wi-fi 6 are...

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