802.11ac (Gigabit WiFi)

Cisco Confidential © 2013 Cisco and/or its affiliates. All rights reserved. 1

Cisco Unified Access: 802.11ac Solutions for Mobility Networks

Kurt Sauter

Wireless PSS

© 2013 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2

What is 802.11ac?

•  Most efficient Wi-Fi standard to date

•  3X the performance of 802.11n

•  Wider channels and more spatial streams

•  Operates on the less-crowded 5GHz band

What Does 802.11ac Deliver?

•  Consistent connectivity at higher speed

•  Optimized for high density and bandwidth

•  Significantly better client battery life

•  Multi-user mode – “Switch-like”

Practical Considerations for 802.11ac

• Most implementations will be 3 Stream for the first few years • Client device adoption will be rapid to take advantage of extended battery life • Standard is split into 2 phases with Wave 2 coming out in 2015

What is 802.11ac? What does it deliver?


BYOD

The rapid adoption of client devices including 802.11ac

Mobility

Increasing demand for bandwidth & performance throughout the network.

Higher Bandwidth Applications

Both cloud-managed and enterprise solutions


Higher Education K-12 Education

•  Students bring in the latest devices laptops, smartphone, tablets

•  High concentration of devices connecting to the network

•  Better spectrum use in 5GHz (rather than a crowded 2.4GHz band)

•  Collaborative Classrooms with HD Video

•  Multi-screen HD video is streamed live to 802.11ac and 802.11n enabled devices in classrooms


Healthcare

•  Transfer large MRI Images or provide live viewing of operations from remote locations in the hospital.

•  Deploy in Density high-density conference areas and meeting rooms to address issues resulting from more devices

•  Faster File transfer means less contention on the network for other applications

Service Provider

•  Competitive differentiator − higher bandwidth in Hotspots

•  Generate more revenue by charging for more bandwidth

•  Better Customer experience with high bandwidth apps − Netflix or Hulu Plus

•  Continued shift to 5 GHz will offload the already crowded 2.4 GHz band


Intel® Dual Band Wireless-AC

7260 shipping today

Linksys 1x1 AC USB

802.11ac mobile devices

CY 2012 CY 2013 CY 2014 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Consumer class devices from Linksys and

Netgear

Cisco 802.11ac Module for

AP3600

Apple releases

MacBook Air with 11ac

802.11ac Wave2 Starts to Roll

1H CY15

IEEE 802.11ac Ratification

Wave 2

HTC One

ZTE Grand Memo

Samsung S 4

Wave 1

…

6

AP3700 Dual-band 802.11ac Wave 1

Apple releases

MacBook Pro Retina with 11ac


•  50% of all shipping mobile devices will be 802.11ac by end of 2014 (ABI)

•  Leadership of 802.11ac amendment to the 802.11 standard

•  First to announce and commit to 802.11ac Wave 1 and 2

•  Industry’s only future-proof modular (3) radio platform

•  Supports 802.11b/g/n, 802.11a/n, and 802.11ac

•  Committed support for Wave 1 and Wave 2

2007 2003 1999 1997 2015 2013

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

802.11ac Wave 2

1 Spatial Stream

3 Spatial

Streams

8 Spatial

Streams

2 G

igab

it

Ethe

rnet

Upl

inks

2 11

54

24

65

600

450

300

6900

1300

870

290 290

6900

3500*

1730*

*Assuming 160 MHz Is Available and Suitable

Gig

abit

Et

hern

et U

plin

k


Mission Specific

600 & 700

Enterprise Class

1600 Mission Critical

2600 Best in Class

3600/3700

Enterprise Best In Class Flexibility Mission Critical

• Up to 600 Mbps • 702w: Wall Plate AP

• Dorms, hospitality • 702i: Compact Mid-market AP • 600: Teleworker

• Up to 600 Mbps • CleanAir Express* • ClientLink 2.0 • VideoStream

• Up to 900 Mbps • High Client Scalability • CleanAir • ClientLink 2.0 • VideoStream

• Over 1 Gbps, 802.11ac support

• High Density Experience • CleanAir 80 MHz, ClientLink 3.0, VideoStream

• Future proof modularity Security, 3G Small Cell or Wave 2 802.11ac

NEW

NEW


2x3:2 $1395

2x3:2 $995

2x2:2 $795

4x4:3 $1495

3x4:3 $1095

3x3:2 $695


•  Scale & Performance for High-Density Env. & Cutting Edge Mobile Devices

•  3x Performance of Current Wi-Fi Higher performance at a Greater Distance

•  Industry’s first 4x4:3 802.11ac Access Point

•  Device Battery Life Savings: RF Excellence

•  Modular Design: Future-proof for Next-Gen Mobile Devices and Wi-Fi Standards

•  WSSI •  3G Small Cell •  802.11ac Wave 2 (future)


•  CleanAir 80 MHz High density auto interference mitigation

•  ClientLink 3.0 Up to 60% better performance & range

•  Optimized Roaming Intelligently assist client roaming

•  Cross AP Noise Reduction* Enables greater AP density networks

•  Enhanced Location Accuracy* Ideal for CMX

•  (* future)


3600 3700

Max Data Rate 450 Mbps 1.3 Gbps – 11ac Module 1.3 Gbps

Radios Dual Band Dual Band

RF Design (MIMO:SS) 4x4:3 – Integrated Radios 3x3:3 – 11ac Module

4x4:3 .11b,g,n and .11a.n.ac

Power Draw 4x4:3 + 3x3:3 = 802.3at 5 GHz only = 802.3af

4x4:3 = 802.3at 3x3:3 = 802.3af

Client Count 200 - per integrated radio 50 – 11ac Module 200 - per integrated radio

Beamforming ClientLink 2.0 a/g/n - AP ECBF with 11ac – Module

ClientLink 2.0+ a/g/n/ac and ECBF with 11ac

Beamforming Client Count 128 - per integrated radio 7 – 11ac Module

128 - per integrated radio .11b,g,n and .11a.n.ac

Spectrum Intelligence CleanAir CleanAir RRM ✔ ✔

Modules

WSSI 802.11ac Wave 1

3G Small Cell 802.11ac Wave 2

WSSI

3G Small Cell 802.11ac Wave 2

List Price (Integrated Ant.) $1495 – AP $500 – 11ac Module $1495


•  802.11a/g use , BPSK, QPSK, 16-QAM or 64-QAM

•  64 small waves (called Carriers, or Tones) No relationship between “64 carriers” and “64” in 64-QAM

•  Some carriers are not used for data: •  48 data subcarriers (in green) •  4 pilot subcarriers (in red) for synchronization and

tracking •  12 zero subcarriers (in black) for calibration on sides

and center

•  Inside each carrier, symbols are separated by silences (guard intervals), and some of them are repeated

000 000

000 001

000 011

000 010

001 001 011 001 010 001

001 011 011 011 010 001

001 010 011 010 010 010

001 000 010 000 011 000

100 010

111 000 101 000 100 000 110 000

110 001 111 001 101 001 100 001

100 011 101 011 111 011 110 011

101 010 111 010 110 010

110 100 000 100 001 100 011 100 010 100

010 101 011 101 001 101 000 101

010 111 011 111 001 111 000 111

010 110 011 110 001 110 000 110 110 110 111 110 101 110 100 110

110 111 111 111 101 111 100 111

110 101 111 101 101 101 100 101

111 100 101 100 100 100

64-QAM

110 110

001 101

100 010

110 110

001 101

100 010

Modulation Data Rate per Carrier (kb/s)

Total Gross Data Rate (Mb/s)

Repeat ratio

Total Net Data Rate (Mb/s)

64-QAM 1125 72 1/3 48

64-QAM 1125 72 1/4 54


•  802.11n aggregates two carriers to more than double the speed: 128 subcarriers

•  14 zero subcarriers (vs. 12) for calibration on sides and center

•  6 pilot subcarriers (vs. 4) for synchronization and tracking

•  108 data subcarriers (vs. 48) •  54 Mb/s to 108+11 = 119 Mb/s •  Usable only in the 5GHz band

•  802.11n also allows several co-existing radios on the same frequency (MIMO) •  Up to 4 radios, to receive and / or to send:

“abcdef”

“def”

“abc” MIMO AP

Sending side: send more symbols, in parallel (spatial multiplexing)

“abc”

“abc”

“abc”

MIMO AP

Sending side: synchronize signals for better resulting signal at receiving end (Transmit Beamforming, TxBF, ClientLink)

“abc”

“abc”

“abc”

MIMO AP

Receiving side: synchronize signals for better signal (Maximal Ration Combining, MRC)


MCS Modulation Ratio 20 MHz channel

40 MHz channel

800 ns GI 400 ns GI 800 ns GI 400 ns GI

0 BPSK 1/2 6.5 7.2 13.5 15

1 QPSK 1/2 13 14.4 27. 30

2 QPSK 3/4 19.5 21.7 40.5 45

3 16-QAM 1/2 26 28.9 54 60

4 16-QAM 3/4 39 43.3 81 90

5 64-QAM 2/3 52 57.8 108 120

6 64-QAM 3/4 58.5 65 121.5 135

7 64-QAM 5/6 65 72.2 135 150


Spatial Streams

Data rate (20 MHz channel,

800 ns GI)


400 ns GI)


800 ns GI)


400 ns GI)

1 65.5 72.2 135 150

2 130 144.4 270 300

3 195 216.7 405 450

4 260 288.8 540 600


•  Increase channel width… beyond 40 MHz •  Increase number of spatial streams… more than 4 •  Improve the modulation? Is 64-QAM the best we can do?

•  Better manage the cell •  Why would only one device send at a time?

–  If we can have one device send 3 streams at the same time on the same frequency, why not have 3 devices send 1 stream at the same time on the same frequency instead?

•  Why would all devices be on the same frequency?

–  If we can send one 40 MHz signal, why not send two 20 MHz signals instead?


•  160 MHz-wide channel width… Up to 160 MHz for APs 80 MHz for stations, 160 MHz optional

•  More spatial streams Up to 8 spatial streams 8 radio circuits sending or receiving

•  Better modulation 256-QAM (8 bits per symbol vs. 6 bits for QAM-64) Up to 4 times faster


•  8 spatial streams… but many (battery-operated) clients will be 1 SS… are we going to “waste” 7 SS (like we “waste” 3 SS with 802.11n?)

•  No! With MU-MIMO, up to 4 clients can receive signals at the same time, on the same frequency

•  Each client has a dedicated spatial stream •  No collisions anymore •  “Full-duplex” becomes possible

“def”

“abc” MIMO AP



40 MHz channel

80 MHz channel 160 MHz channel

800 ns GI 400 ns GI 800 ns GI 400 ns GI 800 ns GI 400 ns GI 800 ns GI 400 ns GI

0 BPSK 1/2 6.5 7.2 13.5 15 29.3 32.5 58.5 65

1 QPSK 1/2 13 14.4 27. 30 58.5 65 117 130

2 QPSK 3/4 19.5 21.7 40.5 45 87.8 97.5 175.5 195

3 16-QAM 1/2 26 28.9 54 60 117 130 234 260

4 16-QAM 3/4 39 43.3 81 90 175.5 195 351 390

5 64-QAM 2/3 52 57.8 108 120 234 260 468 520

6 64-QAM 3/4 58.5 65 121.5 135 263.3 292.5 526.5 585

7 64-QAM 5/6 65 72.2 135 150 292.5 325 585 650

8 256-QAM 3/4 78 86.7 162 180 351 390 702 780

9 256-QAM 5/6 N/A N/A 180 200 390 433.3 780 866.7



40 MHz channel



0 BPSK 1/2 13 14.4 27 30 58.6 65 117 130

1 QPSK 1/2 26 28.8 54. 60 117 130 234 260

2 QPSK 3/4 39 43.4 81 90 174.6 195 351 390

3 16-QAM 1/2 52 37.8 108 120 234 260 468 520

4 16-QAM 3/4 78 86.6 162 180 351 390 702 780

5 64-QAM 2/3 104 111.6 216 240 468 520 936 1040

6 64-QAM 3/4 117 130 243 270 526.6 585 1053 1170

7 64-QAM 5/6 130 144.4 270 300 585 650 1170 1300

8 256-QAM 3/4 156 173.4 324 360 702 780 1404 1560

9 256-QAM 5/6 N/A N/A 360 400 780 866.6 1560 1733.4



40 MHz channel



0 BPSK 1/2 19.5 21.6 40.5 45 87.9 97.5 175.5 195

1 QPSK 1/2 78 43.2 81 90 175.5 195 351 390

2 QPSK 3/4 58.5 65.1 121.5 135 263.4 292.5 526.5 585

3 16-QAM 1/2 78 86.7 162 180 351 390 702 780

4 16-QAM 3/4 117 129.9 243 270 526.5 585 1053 1170

5 64-QAM 2/3 156 173.4 324 360 702 780 1404 1560

6 64-QAM 3/4 175.5 195 364.5 405 789.9 877.5 1579.5 1755

7 64-QAM 5/6 204 216.6 405 450 877.5 975 1755 1950

8 256-QAM 3/4 234 260.1 486 540 1053 1170 2106 2340

9 256-QAM 5/6 N/A N/A 540 600 1170 1299.9 2340 2600.1


1 2 3 4 5 6 7 80

1000

2000

3000

4000

5000

6000

7000

No of Spatial Streams

PHY

Laye

r Thr

ough

put (

Mbp

s)

802.11ac PHY Rates, MCS9, Short GI

20MHz40MHz80MHz160MHz

•  Throughput will all depend on stations!

•  Example best case: 160 MHz-wide channel, 8 antenna AP with MU-MIMO support One 4-SS, 160 MHz client, 3.47 Gbps data rate to this client One 2-SS, 160 MHz client, 1.73 Gbps data rate to this client Two 1-SS, 160 MHz clients, 867 Mbps data rate to each client

•  Total cell throughput, 6.93 Gbps! But in reality, clients are not expected to support more than 80 MHz (only the APs will support 160 MHz)


•  AES CCMP uses blocks of 128 bits, with a 128 bit key: •  128 bit key is getting a bit light, especially if you want FIPS certification (you will require 256

bit keys at some point) •  Blocks of 128 bits: with 802.11n A-MPDU max length of 65,535 octets, you may need more

than 24 580 calculations to encrypt a frame •  If your throughput is about 270 Mbps (3SS 450 Mbps), this represents more than 13 million

calculations per second (just to encrypt) •  Imagine 6.93 Gbps… close to 350 million calculations per second…

•  The 802.11ac members decided that more efficiency would soon be needed

•  A first change is that 802.11ac allows for 256 bit keys, even with WPA2/CCMP and 128-bit blocks

•  Packet format and process would stay the same, except that MIC would change from 64 bits (8 bytes) to 128 bits (16 bytes)


•  A second change is that AES with Counter Cipher Mode (CCM) with Block Chaining Message Authentication Code (CMAC) Protocol (CCMP) is not the only possible mechanism anymore

•  A new mechanism, AES with GCM with Galois Message Authentication Code (GMAC) Protocol (GCMP) is allowed

•  Key is 128 or 256 bits

•  Block can be 128, 192, 256, 384, 512 or 704 bit long

•  A great strength of this mechanism is that you can calculate (still using AES) the different elements needed for the MIC determination in parallel, saving an enormous amount of time

•  GCMP was recently allowed in 802.11ac, experiments are being made so see how much time is saved

•  GCMP (with 128 bit blocks and key) was already allowed by 802.11ad


•  More streams: it’s not that easy! •  Multiple streams reach multiple receiving circuits •  Distinguishing one from the other is difficult •  Larger channel is easier than more streams

Throughput

0

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240

0 10 20 30 40 50 60 70 80

Range (m)

OTA

Thro

ughp

ut (M

bps)

1x1 - 20 MHz

2x2 - 20 MHz3x3 - 20 MHz

4x4 - 20 MHz

1x1 - 40 MHz2x2 - 40 MHz


•  Here again, not that easy!

•  Where do I find 160 MHz? •  One 80 MHz channel in 2.4GHz •  Two 160 MHz channels in 5 GHz (with DFS; one without DFS band)

•  802.11ac focuses on 5 GHz

•  Even in 5 GHz, a new protocol does not make the spectrum wider

•  One great advantage of 802.11ac will be to increase the 5 GHz adoption •  But multiple 802.11ac cell coexistence will be a challenge •  And can you afford 8 radios in your mobile device?


•  In the US there are currently there are 22/10/5/1 channels with bandwidth 20/40/80/160MHz channels

•  With opening up of 5.35-5.47GHz & 5.85-5.925GHz, the number of channels increases to 34/16/8/3

•  If the industry manages to take back the TDWR channels, the number of increases to 37/18/9/4

144

140

136

132

128

124

120

116

112

108

104

100

165

161

157

153

149

64

60

56

52

48

44

40

36

Channel #

20 MHz

40 MHz

80 MHz

160 MHz UNII-1 UNII-2 UNII-2 Extended UNII-3

5250 MHz

5350 MHz

5470 MHz

5725 MHz

96

92

88

84

80

76

72

68

169

173

177

181

5825 MHz

5925 MHz

Available TDWR channels, not yet available To become available Special OOBE must be met


•  The number of channels with 20/40/80/160MHz bandwidth in other countries is currently:

•  EU: 17/8/4/2 •  China: 5/2/1/0 – about to expand number of channels •  India: 13/6/3/1 •  Japan: 19/9/4/2 •  Russia: 16/8/4/1

•  Efforts are underway globally to expand the availability of 5Ghz, including for use by wide 802.11ac channels


•  WFA Wave 1 certification includes only a subset of features: •  80 MHz is mandatory, 256QAM is optional (but all vendors put it in) •  Ability to RX 1/2/3SS is tested

–  2SS is mandatory for non-battery-powered APs –  Only 1SS is mandatory for battery powered APs and clients

•  For Wave 1, the majority of vendors focus on 80 MHz, 1-3SS and 256QAM •  Wave 1 products are based on 11ac D3.0 (May 2012) and started in June 2013 •  The WFA brand name is “Wi-Fi CERTIFIED™ ac”

•  Wave 2 should include: 256QAM, 160MHz, 4SS – 3.5Gbps PHY, 2.4Gbps MAC •  Fort Wave 2, it is expected that 160 MHz devices appear with 1-3SS for low- to high-end

products (data rates of 867-2600 Mbps) •  Marketing roadmap for Wave 2 has not yet be approved •  In between, 802.11ac draft 7 was recirculated and approved with few comments •  Amendment final approval is expected… next month (officially, March 2014)


•  80 MHz, 3 SS => 1.3 Gbps

•  80 MHz, 2 SS => 866.7 Mbps

•  80 MHz, 1 SS => 433.3 Mbps

•  256 QAM is very rewarding, for marketing

•  However, noise affects dense signal (high QAM density) more than signal w/lower density

•  1.3 Gbps range is likely to be short! 0

45

90 135

180

225 270

315

0

45

90

135

180

225 270

315

QPSK 16-QAM

1000 points mapped, no noise

0

45

90

135

180

225

270 315

0

45

90

135

180

225

270

315

1000 points mapped, with noise


•  802.11ac MU MIMO is like 802.11n MIMO, except instead of one client, there are up to four clients

•  AP does pre-coding for all the clients within the MU group simultaneously •  In MU precoding, when AP beamforms space-time streams to one client, it

simultaneously null-steers those space-time streams to the rest. •  All users’ MPDUs are padded to the same number of OFDM symbols

•  MU-MIMO is technically risky and challenging: •  Needs precise channel estimation (CSI) to maintain deep nulls •  Precise channel estimation adds overhead •  Rate adaptation is more difficult •  Throughput benefits are sensitive to MU grouping

WFA Wave 2 certification: •  MU-MIMO

Null-steering:To send data to user 1, the AP forms a strong beam toward user 1, shown as the top-right lobe of the blue curve. At the same time the AP minimizes the energy for user 1 in the direction of user 2 and user 3. This is called "null steering" and is shown as the blue notches. Same logic applies to red and yellow beams.


•  One issue of 802.11n is 40 MHz coexistence with 20 MHz channels •  B sends on Ch 36 (because it senses 802.11a AP on Ch 40) •  802.11an AP does CCA on 36,40, hears nothing, transmits •  40 MHz signal collides at B

36,40 40 B

Collision on 40

802.11n 802.11a 802.11n

CCA: 40 is busy -> use 36 only CCA: 36 and 40 clear

-> use 36 and 40

36

36+40


•  This issue could be a lot worse for 802.11ac: •  802.11ac can use 20 MHz, 40 MHz (20 MHz primary/secondary), 80 MHz (40 MHz primary/secondary)

36 Primary 20

40 44 48

36 Primary 20

40 44 48

36

Primary 20

40 44 48

36 Primary 20

40 44 48

Free?

Secondary 20

Free?

Secondary 40

Secondary 20

Secondary 20

Primary 40

Primary 40


•  This issue could be a lot worse for 802.11ac: •  If secondary20 is busy, transmitter cannot extend to secondary40 •  OBSS (802.11n or 802.11ac) with primary on local AP secondary would cause both APs to block each

other •  Choice of primary channel is critical for 802.11ac

Best configuration: both primary 20s aligned Second best: primary 20s far apart (e.g. 36 and 48)

36 Primary 20

40 44 48 Secondary 40 Secondary 20

36 Secondary 20

40 44 48 Secondary 40 Primary 20

Block Block Wasted

Block

36


Interference at the responder side

•  Initiator sends RTS on channels that its senses are free

•  Subsequent exchange depend on the capabilities of both sides

•  Dynamic bandwidth reservation: Responder sends CTS only on channels that it sense are free. Initiator transmits data only over channels indicated free by CTS response

•  Static bandwidth reservation: If the initiator has static capability, the responder sends CTS only if all the requested channels are free, otherwise sends no CTS

RTS

CTS CTS

Data transmission Data transmission

RTS is in 20MHz 11a format, but indicates: (1) 80MHz BW, (2) initiator is capable of dynamic BW

CTS is in 20MHz 11a format, but indicates 40MHz BW

Example of “Dynamic Bandwidth Reservation”

WFA Wave 1 certification: •  RTS with BW signaling is optional •  CTS with BW signaling in response to RTS with BW signaling is a mandatory test

RTS RTS RTS


•  80 MHz channel should be seen in Spectrum Expert


•  Integrated devices – Shipping Apple – Macbook Air – http://www.apple.com/macbook-air/features.html#wireless Intel® Dual Band Wireless-AC 7260 - http://www.intel.com/content/www/us/en/wireless-products/dual-band-wireless-ac-7260-bluetooth.html Samsung S 4 - http://www.samsungmobilepress.com/2013/03/14/GALAXY-S-4-1 HTC ONE – http://www.htc.com/us/smartphones/htc-one/#specs ZTE Grand Memo - http://www.zteusa.com/news-zte-launches-grand-memo/

•  USB Clients - Shipping LinkSys AE6000 – 1x1 - http://store.linksys.com/linksys-ae6000-wifi-wireless-ac-dual-band-mini-usb-adapter_stcVVproductId153081401VVcatId553466VVviewprod.htm Asus – USB-AC53 – 2x2 - http://www.asus.com/Networking/USBAC53/ NetGear – A6200 – 2x2 - http://www.netgear.com/home/products/wireless-adapters/ultimate-wireless-adapters/a6200.aspx Belkin - 2x2 - http://www.belkin.com/us/F9L1106-Belkin/p/P-F9L1106 D-Link – 2x2 - http://www.dlink.com/us/en/home-solutions/connect/adapters/dwa-182-wireless-ac1200-dual-band-usb-adapter Bulffalo – 2x2 - http://www.buffalotech.com/products/wireless/client-adapters/airstation-ac866-dual-band-wireless-usb-adapter Edimax – 2x2 - http://www.edimax.com/en/produce_detail.php?pd_id=479&pl1_id=28&pl2_id=138

•  Ethernet to 802.11ac Bridges - Shipping LinkSys (Belkin) WUMC710 - http://store.linksys.com/en-us/linksys-WUMC710-wireless-media-connector-wifi-5ghz-bridge_stcVVproductId149779333VVcatId550467VVviewprod.htm Buffalo WLI-H4-D1300 - http://www.buffalo-technology.com/en/wli-h4-di300-airstation-1300.html BEST LIST FOR IDENTIFYING NEW 802.11AC HARDWARE http://wikidevi.com/wiki/List_of_802.11ac_Hardware

REVIEW LAST SEVT


There are so many data-rates in .11ac

Using the internal .11n radio on the AP-3600i. We performed a quick cell size characterization with .11n rates using several .11n clients. When we switched to .11ac clients, and the .11ac radio module it performed similar @40 MHz with clients having a cell size similar to the .11n clients. Take-away .11n/11ac are similar rate/range but of course @80 MHz and 256-QAM you get a significant data-rate boost

New facility in Richfield Ohio for competitive testing


Comparison 802.11ac versus 802.11n using 3-SS clients

11ac client Dell E6430 with Broadcom 3-ss Vs. 11n client Apple 3-ss Macbook Pro

(Take-away) .11ac client @ 3-ss is able to get twice the speed


•  Also keep in mind that 802.11ac is new… client performances and behavior vary:

J L

From the vendor, after long Tshoot: “I understand that you want to verify the Channels which are supported in US and in this regard, I would like to mention that the Channels supported in US are as below: ## 36 ## 40 ## 44 ## 153” Translation: your card shows 149,153,157,161, but you are in fact operating on 153 only, in 20 MHz…


0

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5 10 15 20 25 30 35 40 45 50 55 60

MEG

ABITS PE

R SECO

ND

NUMBER OF CLIENTS

TCP Downlink Throughput 5GHz MulB-‐Client: Sixty 802.11ac Clients

Thank you.

802.11ac (Gigabit WiFi)

Technology

Transcript of 802.11ac (Gigabit WiFi)