802.11ac HIGHLIGHTS 802.11ac WAVE 2 · PDF fileEnhanced modulation and coding scheme from...
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802.11ac REFERENCE 802.11ac WAVE 1 HIGHLIGHTS • Single-user MIMO • 3 Spatial Streams (3SS) • 20/40/80 MHz channel • 256-QAM modulation and coding • Explicit transmit beamforming 802.11ac WAVE 2 • Multi-user MIMO • 4 Spatial Streams (4SS) • 20/40/80/160 MHz channel • 256-QAM modulation and coding • Explicit transmit beamforming 802.11ac beamforming is standards-based and implemented in 802.11ac chip sets. It enhances the signal-to-noise ratio for higher data rates at a given range. Implemented in baseband, it works with all antenna subsystems and creates infinite beamforming combinations to improve wireless performance in dynamic RF environments. MULTI-USER MIMO (MU-MIMO) MU-MIMO is one of the key features introduced with 802.11ac Wave 2. It allows simultaneous data transmission to multiple Wave 2 devices, enabling enterprises to increase network efficiency and device density of APs. MU-MIMO 1 SS CLIENTS 2 SS CLIENTS 3 SS VHT 80 MHz AP 683 622 4 SS VHT 80 MHz AP 910 789 MU-MIMO MAX 1 SS CLIENTS MAX 2 SS CLIENTS 3 SS VHT 160 MHz AP 1365 1244 4 SS VHT 160 MHz AP 1820 1578 MU-MIMO BEST CASE THROUGHPUTS 75% EFFICIENCY FOR 1 SS CLIENTS 65% EFFICIENCY FOR 2 SS CLIENTS (UP TO 3 WASTED STREAMS) 1SS SU-MIMO (WAVE 2 CLIENTS) MU-MIMO 1SS 1SS 1SS 1SS ENHANCED USER EXPERIENCE 802.11ac EXPLICIT BEAMFORMING Aruba enhanced ClientMatch brings patent-pending MU-MIMO awareness into the client steering algorithms. It groups MU-MIMO capable clients in an AP for simultaneous data transmission, improving network efficiency and creating a better user experience. ARUBA ENHANCED CLIENTMATCH WAVE 2 OR WAVE 1 WAVE 1 C 1 WAVE 2 C 2 MU-MIMO SU-MIMO AP 1 WAVE 2 WAVE 2 C 3 WAVE 2 C 4 MU-MIMO MU-MIMO AP 2 AFTER CLIENTMATCH WAVE 2 OR WAVE 1 WAVE 1 C 1 WAVE 2 C 2 SU-MIMO SU-MIMO AP 1 WAVE 2 WAVE 2 C 3 WAVE 2 C 4 MU-MIMO MU-MIMO AP 2 BEFORE CLIENTMATCH LEARN MORE: www.arubanetworks.com/11ac WIDER CHANNELS 802.11ac PHYSICAL LAYER FRAME FORMAT MODULATION & NET BIT RATE (PER STREAM) FCC DOMAIN FREQUENCY WI-FI CHANNEL # CHANNEL WIDTH 20 MHz 40 MHz 80 MHz 160 MHz ETSI DOMAIN FREQUENCY WI-FI CHANNEL # CHANNEL WIDTH 20 MHz 40 MHz 80 MHz 160 MHz 5170 MHz *Channels 120, 124 and 128 are Doppler Radar channels that may be used in some cases. 5250 MHz 5330 MHz 5490 MHz 5710 MHz 5735 MHz 5815 MHz 5815 MHz 5835 MHz UNII-1 UNII-2 UNII-3 ISM UNII-2-Extended Weather Radar 36 40 44 48 52 56 60 64 100 104 108 112 120 124 128 136 140 144 149 153 157 161 165 132 116 802.11ac CHANNEL ALLOCATION (NORTH AMERICA) DFS Channels 802.11ac 5 GHZ ETSI CHANNEL ALLOCATION (EUROPE) Band A Band B 36 40 44 48 52 56 60 64 100 104 108 112 120 124 128 136 140 144 132 116 DFS Channels UNII-1 UNII-2 UNII-2-Extended 5170 MHz 5250 MHz 5330 MHz 5490 MHz 5710 MHz MORE EFFICIENT ENCODING WITH 256-QUADRATURE AMPLITUDE MODULATION (QAM) Enhanced modulation and coding scheme from 64-QAM in 802.11n to 256-QAM in 802.11ac increases data rates by 33% at short ranges. The frameworks have been extended to ensure the backwards compatibility with 802.11 a/b/g/n, and provides for the higher modulation rates. 802.11ac provides wider channels that enable faster data transmission on 80 MHz and 160 MHz bands. However, until governments open up more spectrum in 5 GHz bands, 160 MHz channels are not recommended because they’ll lead to channel planning and co-channel interference. 256-QAM AMPLITUDE +1 AMPLITUDE -1 QUADRATURE -1 QUADRATURE +1 AMPLITUDE +1 AMPLITUDE -1 QUADRATURE -1 QUADRATURE +1 16-QAM AMPLITUDE +1 AMPLITUDE -1 QUADRATURE -1 QUADRATURE +1 64-QAM SUPERB WI-FI PERFORMANCE OFDM PHY MODULATION (IDENTICAL FOR ALL THE USERS) 8us L-STF L-LTF L-SIG VHT-SIG-A VHT-SIG-B DATA VHT-STF VHT-LTF 8us 8us 4us 4us 4us Var 4us per sym VHT MODULATION (RECEIVED PER USER) var 6 bits PSDU PHY pad Tail (optional) Service 16 bits Scrambler Initialization Reserved VHT-SIG-B CRC 7 bits 1 bit 8 bits 0° 60° 30° 0° 10 20 30 30 30 20 20 10 20 30 20 10 330° 300° 270° 240° 210° 180° 150° 120° OMINI NON-BEAMFORMING 0 30 60 90 120 150 180 210 240 270 300 330 C1 C2 4 ANTENNA ELEMENTS BEAMFORMING TO CLIENT 1 0 30 60 90 120 150 180 210 240 270 300 330 C1 C2 4 ANTENNA ELEMENTS BEAMFORMING TO CLIENT 2 MCS INDEX MODULATION CODING 20 MHz 40 MHz 80 MHz 160 MHz 0 BPSK 1/2 7.2 15.0 32.5 65.0 1 QPSK 1/2 14.4 30.0 65.0 130.0 2 QPSK 3/4 21.7 45.0 97.5 195.0 3 16-QAM 1/2 28.9 60.0 130.0 260.0 4 16-QAM 3/4 43.3 90.0 195.0 390.0 5 64-QAM 2/3 57.8 120.0 260.0 520.0 6 64-QAM 3/4 65.0 135.0 292.5 585.0 7 64-QAM 5/6 72.2 150.0 325.0 650.0 8 256-QAM 3/4 86.7 180.0 390.0 780.0 9 256-QAM 5/6 96.3 200.0 433.3 866.7 CHANNEL BANDWIDTH 1 SS 2 SS 3 SS 4 SS 20 MHz 802.11n (2.4 GHz) 72.2 Mbps 144.4 Mbps 216.7 Mbps 288.9 Mbps 40 MHz 802.11n (2.4/5 GHz) 150 Mbps 300 Mbps 450 Mbps 600 Mbps 80 MHz 802.11ac (5 GHz) 433 Mbps 867 Mbps 1300 Mbps 1733 Mbps 160 MHz 802.11ac (5 GHz) 867 Mbps 1733 Mbps 2600 Mbps 3467 Mbps * Data rates may vary depending on client availability. 802.11ac Wave 1 products, certified by the Wi-Fi Alliance (WFA) since mid-2013, deliver a gigabit Wi-Fi network with the maximum data rate of 1.3 Gbps. With 4 spatial stream clients operating in 80 MHz channels, the new 802.11ac Wave 2 technology increases the data rate by 30% to 1.7 Gbps. INCREASED DATA RATES 802.11ac PHYSICAL LAYER FRAME * * *
Transcript of 802.11ac HIGHLIGHTS 802.11ac WAVE 2 · PDF fileEnhanced modulation and coding scheme from...
802.11acREFERENCE
802.11ac WAVE 1
HIGHLIGHTS
• Single-user MIMO• 3 Spatial Streams (3SS)• 20/40/80 MHz channel• 256-QAM modulation and coding• Explicit transmit beamforming
802.11ac WAVE 2• Multi-user MIMO• 4 Spatial Streams (4SS) • 20/40/80/160 MHz channel• 256-QAM modulation and coding• Explicit transmit beamforming
802.11ac beamforming is standards-based and implemented in 802.11ac chip sets. It enhances the signal-to-noise ratio for higher data rates at a given range. Implemented in baseband, it works with all antenna subsystems and creates infinite beamforming combinations to improve wireless performance in dynamic RF environments.
MULTI-USER MIMO (MU-MIMO)MU-MIMO is one of the key features introduced with 802.11ac Wave 2. It allows simultaneous data transmission to multiple Wave 2 devices, enabling enterprises to increase network efficiency and device density of APs.
MU-MIMO 1 SS CLIENTS 2 SS CLIENTS
3 SS VHT 80 MHz AP 683 622
4 SS VHT 80 MHz AP 910 789
MU-MIMO MAX 1 SS CLIENTS MAX 2 SS CLIENTS
3 SS VHT 160 MHz AP 1365 1244
4 SS VHT 160 MHz AP 1820 1578
MU-MIMO BEST CASE THROUGHPUTS75% EFFICIENCY FOR 1 SS CLIENTS 65% EFFICIENCY FOR 2 SS CLIENTS(UP TO 3 WASTED STREAMS)
1SS
SU-MIMO(WAVE 2 CLIENTS)
MU-MIMO
1SS
1SS
1SS
1SS
ENHANCED USER EXPERIENCE
802.11ac EXPLICIT BEAMFORMING
Aruba enhanced ClientMatch brings patent-pending MU-MIMO awareness into the client steering algorithms. It groups MU-MIMO capable clients in an AP for simultaneous data transmission, improving network efficiency and creating a better user experience.
ARUBA ENHANCED CLIENTMATCH
WAVE 2 OR WAVE 1
WAVE 1 C1 WAVE 2 C2
MU-MIM
O
SU-M
IMO
AP 1
WAVE 2
WAVE 2 C3 WAVE 2 C4
MU
-MIM
O
MU
-MIM
O
AP 2
AFTER CLIENTMATCHWAVE 2 OR WAVE 1
WAVE 1 C1 WAVE 2 C2
SU-M
IMO
SU-M
IMO
AP 1
WAVE 2
WAVE 2 C3 WAVE 2 C4
MU
-MIM
O
MU
-MIM
O
AP 2
BEFORE CLIENTMATCH
LEARN MORE: www.arubanetworks.com/11ac
WIDER CHANNELS
802.11ac PHYSICAL LAYER FRAME FORMATMODULATION & NET BIT RATE (PER STREAM)
FCC DOMAIN
FREQUENCY
WI-FI CHANNEL #
CHANNEL WIDTH20 MHz
40 MHz
80 MHz
160 MHz
ETSI DOMAIN
FREQUENCY
WI-FI CHANNEL #
CHANNEL WIDTH20 MHz
40 MHz
80 MHz
160 MHz
5170MHz
*Channels 120, 124 and 128 are Doppler Radar channels that may be used in some cases.
5250MHz
5330MHz
5490MHz
5710MHz
5735MHz
5815MHz
5815MHz
5835MHz
UNII-1 UNII-2 UNII-3 ISMUNII-2-ExtendedWeather Radar
36 40 44 48 52 56 60 64 100
104
108
112
120
124
128
136
140
144
149
153
157
161
165
132
116
802.11ac CHANNEL ALLOCATION (NORTH AMERICA)
DFS Channels
802.11ac 5 GHZ ETSI CHANNEL ALLOCATION (EUROPE)
Band A Band B
36 40 44 48 52 56 60 64 100
104
108
112
120
124
128
136
140
144
132
116
DFS Channels
UNII-1 UNII-2 UNII-2-Extended
5170MHz
5250MHz
5330MHz
5490MHz
5710MHz
MORE EFFICIENT ENCODING WITH 256-QUADRATURE AMPLITUDE MODULATION (QAM)Enhanced modulation and coding scheme from 64-QAM in 802.11n to 256-QAM in 802.11ac increases data rates by 33% at short ranges. The frameworks have been extended to ensure the backwards compatibility with 802.11 a/b/g/n, and provides for the higher modulation rates.
802.11ac provides wider channels that enable faster data transmission on 80 MHz and 160 MHz bands. However, until governments open up more spectrum in 5 GHz bands, 160 MHz channels are not recommended because they’ll lead to channel planning and co-channel interference.
256-QAMAMPLITUDE +1
AMPLITUDE -1
QU
ADRA
TURE
-1
QU
ADRA
TURE
+1
AMPLITUDE +1
AMPLITUDE -1
QU
ADRA
TURE
-1
QU
ADRA
TURE
+1
16-QAM
AMPLITUDE +1
AMPLITUDE -1
QU
ADRA
TURE
-1
QU
ADRA
TURE
+1
64-QAM
SUPERB WI-FI PERFORMANCE
OFDM PHY MODULATION(IDENTICAL FOR ALL THE USERS)
8us
L-STF L-LTF L-SIG VHT-SIG-A VHT-SIG-B DATAVHT-STF VHT-LTF
8us 8us4us 4us 4us Var4us per sym
VHT MODULATION(RECEIVED PER USER)
var 6 bits
PSDU PHY pad Tail
(optional)
Service
16 bits
ScramblerInitialization Reserved VHT-SIG-B
CRC
7 bits 1 bit 8 bits
0°
60°
30°
0°
10
20
30
30
30 20 2010 20 30
20
10
330°
300°
270°
240°
210°180°
150°
120°
OMINI NON-BEAMFORMING
0
30
60
90
120
150
180
210
240
270
300
330
C1
C2
4 ANTENNA ELEMENTSBEAMFORMING TO CLIENT 1
0
30
60
90
120
150
180
210
240
270
300
330
C1C2
4 ANTENNA ELEMENTSBEAMFORMING TO CLIENT 2
MCS INDEX MODULATION CODING 20 MHz 40 MHz 80 MHz 160 MHz 0 BPSK 1/2 7.2 15.0 32.5 65.0 1 QPSK 1/2 14.4 30.0 65.0 130.0 2 QPSK 3/4 21.7 45.0 97.5 195.0 3 16-QAM 1/2 28.9 60.0 130.0 260.0 4 16-QAM 3/4 43.3 90.0 195.0 390.0 5 64-QAM 2/3 57.8 120.0 260.0 520.0 6 64-QAM 3/4 65.0 135.0 292.5 585.0 7 64-QAM 5/6 72.2 150.0 325.0 650.0 8 256-QAM 3/4 86.7 180.0 390.0 780.0 9 256-QAM 5/6 96.3 200.0 433.3 866.7
CHANNEL BANDWIDTH 1 SS 2 SS 3 SS 4 SS
20 MHz 802.11n (2.4 GHz) 72.2 Mbps 144.4 Mbps 216.7 Mbps 288.9 Mbps
40 MHz 802.11n (2.4/5 GHz) 150 Mbps 300 Mbps 450 Mbps 600 Mbps
80 MHz 802.11ac (5 GHz) 433 Mbps 867 Mbps 1300 Mbps 1733 Mbps
160 MHz 802.11ac (5 GHz) 867 Mbps 1733 Mbps 2600 Mbps 3467 Mbps
* Data rates may vary depending on client availability.
802.11ac Wave 1 products, certified by the Wi-Fi Alliance (WFA) since mid-2013, deliver a gigabit Wi-Fi network with the maximum data rate of 1.3 Gbps. With 4 spatial stream clients operating in 80 MHz channels, the new 802.11ac Wave 2 technology increases the data rate by 30% to 1.7 Gbps.
INCREASED DATA RATES
802.11ac PHYSICAL LAYER FRAME
* * *
