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802.11AX
WiFi 802.11ax
3
802.11ax
7
: 802.11ax
27
,
28
28
29
32
32
( Wave 2 802.11ax ) 33
백서 802.11A
X
3
WiFi 802.11ax
WiFi PC
. WiFi
1a: WiFi
Alliance 19 2018 , WiFi
50% .
1b: WiFi
180 WiFi 80
WiFi , 30
WiFi WiFi
. LTE ,
WiFi
. WiFi
.
2:
2018 1 (Android , MB)
WiFi 802.11 1 6
WiFi
IEEE(Institute of
Electrical and Electronics Engineers) . IEEE
WiFi Alliance
'WiFi' ,
.
WiFi WiFi .
'PHY' 802.11ac ,
2014 'Wave 1' 2016 'Wave 2'
. 802.11ac
2008 .
.
802.11ac Wave 2 IEEE
'802.11ax' 'PHY' .
2014 3 2018
, ' ' .
.
IEEE 2019
.
백서 802.11A
X
4
802.11 WiFi Alliance
IEEE
. 802.11ax 'WiFi CERTIFIED
AX ' .
2018 2019
.
,
.
802.11ax
IEEE WiFi Alliance 802.11ac
WiFi WiFi
.
' '
' '
,
.
WiFi
.
.
.
, ,
.
. IEEE WiFi Alliance ,
.
, WiFi
.
PC WiFi
. (IoT)
WiFi
. 802.11ax
IoT
WiFi .
WiFi (WISP)
802.11ax
.
802.11ax 802.11n 802.11ac 'PHY'
.
IEEE WiFi Alliance
.
WiFi Alliance
' ' 2019
2018
.
3:
백서 802.11A
X
5
802.11n
802.11ac 802.11ax
.
.
802.11ax 802.11ac 2
Wave .
Wave 1
Wave 2
. Wave 1( ) Wave 2
2
.
WiFi
'
' Aruba .
802.11n 802.11ac Wave 1 802.11ac Wave 2
.
2
WiFi .
802.11ax
,
. Aruba
.
WiFi
802.11ax
. 2.4GHz 5GHz
802.11ac .
802.11ac 5GHz
(2.4GHz 802.11n
), 802.11ax . ,
WiFi . 2.4GHz
, WiFi
IoT
.
WiFi
IEEE WiFi
Alliance 802.11ax
.
WiFi
. 60GHz 'WiGig' IEEE
WiFi Alliance , 2.4GHz 5GHz
WiFi
.
WiGig
802.11ax .
4:
백서 802.11A
X
6
LTE 5G
.
4 5G
.
IoT, ,
,
.
5G 2G, 3G, 4G
.
5G 5G .
5G 802.11ax Multi-User MIMO,
, , OFDMA,
. ,
,
,
.
5G .
, 5G
WiFi 5G
. LTE/5G WiFi
.
3GPP WiFi Alliance
5G WiFi
.
WiFi
MAC PHY 802.11ax
. WiFi Alliance WiFi CERTIFIED
AX WiFi CERTIFIED AC WiFi CERTIFIED N
.
WiFi CERTIFIED Agile
Multiband .
Agile Multiband
.
.
WiFi ,
. WPA2 2018 WPA3
802.11ax
WPA3 .
802.11ax
5: 802.11ax (Wave 1, 2)
IEEE 802.11ax 50 , WiFi Alliance
. Wave 1 Wave 2
.
• OFDMA: OFDMA 802.11ax
, (
OFDMA )
. OFDMA OFDMA
,
.
OFDMA
.
.
• Multi-User MIMO:
802.11ac . 802.11ax Multi-User
MIMO .
802.11ax 주요 기능
OFDMA
* Multi-User MIMO
OFDM
*
*
(* 802.11ax )
백서 802.11A
X
7
Multi-User MIMO 802.11ax
Wave 2 . OFDMA
.
• :
.
.
• : 802.11a/g 64-QAM , 802.11ac
256 QAM . 802.11ax
1024-QAM .
( SNR).
• OFDM , FFT OFDMA
.
.
• : .
.
.
• :
.
IoT 20MHz
.
• :
.
.
802.11ax
OFDMA
.
802.11ax
.
OFDM WiFi ,
.
( ) .
(FFT) , OFDM
. 802.11ax
4 OFDM 4 .
6: WiFi
백서 802.11A
X
8
1: 802.11ac 802.11ax OFDM
7: OFDM
OFDMA( )
.
1 ( 2 )
2MHz .
.
. null
,
.
4 802.11ac
10% .
OFDM
.
,
.
.
.
.
(FFT) . 802.11
312.5kHz/64 FFT 20
.
OFDMA
OFDMA(Orthogonal Frequency Division Multiple Access) 802.11ax
MU-MIMO(Wave 1
) . OFDMA LTE
. RF
(RU)
.
백서 802.11A
X
9
8: OFDM OFDMA
( OFDMA )
,
.
OFDMA OFDM
(802.11ax )
.
,
. OFDMA
1/2 2
.
.
802.11 CSMA/CA
.
, .
OFDMA
.
CSMA/CA . , 5
100Mbps 50
10Mbps .
802.11ax
. OFDMA
,
.
.
. OFDM
, OFDMA
.
, IoT 20MHz ( )
.
OFDMA QoS ,
. OFDM
OFDMA ' '
.
OFDMA .
802.11
.
.
, OFDMA
.
OFDMA
.
백서 802.11A
X
10
OFDMA
. .
OFDMA
802.11ax
OFDMA . .
OFDMA
.
OFDMA
.
.
.
,
.
802.11ax 26
(2MHz) . 20MHz 26
9 , 9
.
IEEE ' '(RU)
. 26 RU-26 .
RU-26, RU-52, RU-106, RU-242, RU-484 RU-996 .
OFDMA , .
26
2 .
図 9 OFDMA 伝
백서 802.11A
X
11
OFDM
.
,
.
DC
.
10: OFDMA
11: OFDMA
백서 802.11A
X
12
OFDMA ,
OFDMA RU-N( : RU-26)
. RU 802.11ax
.
OFDMA
OFDMA
.
.
.
20MHz
.
IEEE ,
AP ,
.
,
WiFi
.
OFDMA RU
,
. OFDMA
.
2: OFDMA ,
12: OFDMA
백서 802.11A
X
13
Multi-User MIMO
MU-MIMO 802.11ac(Wave 2)
.
AP .
13: Multi-User MIMO
MU-MIMO AP
, .
.
MU-MIMO AP
null
, AP
. MIMO
. 802.11ac
. 802.11ax
.
14:
백서 802.11A
X
14
802.11ac MU-MIMO
.
, 4 AP
. 802.11ax 4
8 MU-MIMO .
802.11ax
.
.
ACK TCP/IP
.
MU-MIMO 802.11ax Wave 2 .
MU-MIMO MU-MIMO OFDMA
MU-MIMO OFDMA MU-MIMO
Wave 2 . Wave 1 OFDMA
MU-MIMO AP
.
802.11
,
. PHY
.
15: -
16:
백서 802.11A
X
15
802.11ax ' '
. 802.11n
802.11
. CSMA/CA 802.11ax
.
RL-SIG 802.11g
802.11n 802.11ax
. ' ' RL-SIG
20MHz .
802.11ax ('HE' 802.11ax IEEE
802.11 'High Efficiency'( ) )
' '
,
802.11ax OFDMA .
HE-SIG-A , , BSS ,
MCS , SS(Spatial Stream) ,
. ,
, 802.11ax ' '
.
HE-SIG-B .
. OFDMA HE-SIG-B
. .
HE-STF
,
HE-LTF MIMO
.
- ,
802.11ax
.
17: ,
, OFDMA
. AP
, MCS . CSMA/CA
802.11ax
.
(FEC) .
AP ( ),
. ' '
MCS .
, LDPC BCC
. 802.11ax
. (BCC( ) 802.11
. BCC
LDPC( ) .)
백서 802.11A
X
16
. 802.11
.
.
AP .
0, 4, 8, 12, 16usec .
802.11n , WiFi
.
18: MAC
MAC
.
.
A-MSDU MAC
.
.
A-MSDU A-MPDU
.
802.11ax
.
MU-MIMO OFDMA .
OFDMA
.
802.11ax
MU-MIMO OFDMA .
AP
, 802.11ax .
.
AP
.
AP MU-MIMO OFDMA
' '
, AP
.
.
,
HE-SIG-B .
백서 802.11A
X
17
.
HE-SIG-B . AP
,
.
OFDMA RU
( : 26 RUx18 242 RUx2).
.
. AP
SS(Spatial Stream) , MCS,
.
802.11ax 20MHz HE-
SIG-B ,
. AP 80MHz 4
HE-SIG-B 20MHz .
HE-SIG-B
.
20
.
.
AP
.
MU-BAR(
), BSRP( ), BQRP(
) .
20:
19:
백서 802.11A
X
18
21:
BlockAck MU , MU
BlockAck 4.096
TXOP ,
. ACK
.
(802.11ac Multi-User MIMO
MU
. 802.11ax 802.11ac
.)
. AP
.
MU-MIMO OFDMA RU ,
22:
백서 802.11A
X
19
.
.
.
•
•
• OFDMA RU
• SS(Spatial Stream)
• MCS
• STBC
• AP ( AP
, RSSI ,
)
• ( MU-MIMO Wave 2
802.11ax .)
.
• :
.
• BRP( ):
.
.
.
• MU-BAR( ):
BlockAck .
.
• MU-RTS( ):
RTS-CTS , .
• BSRP( ): AP
.
• BQRP( ): AP
20MHz RF .
• GCR MU-BAR(
): AP
.
AP
.
23:
백서 802.11A
X
20
OFDMA RU
MU-MIMO , MCS
.
RU MIMO
.
AP
. BA( )
802.11ax ' STA
' 802.11ax .
802.11ax AP
OFDMA MU-MIMO
802.11 AP .
.
802.11ac MU-MIMO AP
MU-MIMO
.
.
802.11ax .
(AP )
,
.
OFDMA .
AP , MU-MIMO OFDMA
( 802.11ax ) ,
.
. MU-MIMO 802.11ax
Wave 2 OFDMA 802.11ax
Wave .
AP ,
,
.
,
. 802.11ax AP
.
24: AP
백서 802.11A
X
21
25: -
AP
MU-MIMO(Wave 1 )
OFDMA
.
ACK ACK
AP
.
802.11ax AP
WiFi (TDD +
TDM/TDMA + OFDMA)
. AP
,
802.11
.
OFDMA
.
8
802.11ac
8
. 4 802.11ac
4
.
802.11ax 8 5G
' MIMO' 8
802.11ax . MU-MIMO
MRC,
AP 1~2
.
AP ,
. 4
AP .
.
2 SS(Spatial Stream)
.
AP . ,
.
802.11
, 802.11ax 802.11ac
1024-QAM .
백서 802.11A
X
22
26: 1024-QAM
256-QAM 1024-QAM OFDM
8 10
25% .
.
256-QAM 16 64-QAM
8 ( ) 32
.
80MHz, 1024-QAM 5/6, MCS-11
-
45dBm .
802.11ax (160MHz
80MHz 2 ).
20, 40, 80MHz
(Mbps, Short Guard Interval).
27: 802.11ax
백서 802.11A
X
23
3: 802.11ax (Mbps, Short Guard Interval)
(SS 8 MCS 11 160MHz 9607.8Mbps .)
(Mbps, Short Guard Interval).
4: 802.11ax (Mbps, Short Guard Interval)
802.11ax
AP .
. AP AP
.
, AP
RF .
AP SINR(
) . MCS
SINR MCS
.
백서 802.11A
X
24
OFDMA RU
RU
.
' ' AP
(EIRP) . 20MHz
EIRP
.
AP
. Wave 1
OFDMA Wave 2 MU-
MIMO .
AP AP SINR
.
. AP
SS(Spatial Stream) , MCS, OFDMA RU
. AP OFDMA
.
.
802.11ax
802.11ax
4 . IoT
.
802.11 .
TWT('Target Wait Time')
. (TWT , IoT
802.11ah , 802.11ah
WiFi .)
TWT .
' PS' WiFi
802.11b . AP
,
( . AP
) AP
DTIM(Delivery Traffic Information Map) .
DTIM AP
.
PS
. DTIM
.
802.11e Voice-over-WiFi IEEE
20
.
(U-APSD)
. PS
AP
.
.
28: 802.11ax
백서 802.11A
X
25
29: 802.11ax TWT
802.11ax TWT
.
AP
.
( , )
. AP
( )
. AP
.
TWT
.
AP
. AP OFDMA
.
.
TWT
.
.
802.11ax . TWT IoT
.
• / AP
. .
, ' '
.
• 20MHz
. WiFi
.
• AP
MCS . AP
.
• BSS
. Wave 2 ( ).
• ' ' ' '
.
.
IoT
.
백서 802.11A
X
26
20MHz
802.11ax IoT
.
WiFi
, IoT
WiFi Bluetooth Zigbee
. WiFi
.
IoT ( : WiFi
) 802.11
.
WiFi
.
802.11ax
. TWT
WiFi IoT .
WiFi
.
802.11ax
. IEEE
WiFi
.
20MHz 2.4GHz 5GHz
, 20MHz
. OFDMA 802.11ax
. 20MHz
IoT
.
(WiFi Alliance 2.4GHz
20MHz 5GHz 20, 40, 80MHz
. 20MHz .)
30: 20MHz
백서 802.11A
X
27
: 802.11ax
31:
802.11ax
.
,
.
.
,
802.11ax
Multi-User MIMO .
, OFDMA
.
BSS
.
OFDMA
.
, :
'IoT' 802.11ax
WiFi
. , TWT, 20MHz ,
OFDMA IoT
.
IoT ,
WiFi . 802.11ax
, .
OFDMA
IoT
.
,
,
WLAN , WiFi
802.11ax
.
5G
' '(FWA) . ,
. 802.11ax
WiFi .
FWA 802.11ac
' 5G' . 802.11ax
WiFi . 802.11ax
.
802.11ax
802.11ax
WiFi
백서 802.11A
X
28
,
WiFi .
15
802.11g 802.11ax .
802.11n 'greenfield'
'greenfield'
.
' ' AP
.
802.11ax Wave 1 Wave 2
802.11ax Wave 1 Wave 2
.
(2018 ) .
6: 802.11ax Wave 1 Wave 2
802.11n 802.11ac WLAN 802.11ax
.
AP ,
.
.
802.11ax AP
. AP 1Gbps ,
2.5Gbps 5Gbps
.
Wave 2 2020
Wave 2 .
802.11ax WiFi Alliance
2018 WiFi Alliance 'WiFi CERTIFIED AX'
4 (
2019 ).
• Wave 1 AP:
.
• Wave 1 : , PC
.
5: 802.11ax :
백서 802.11A
X
29
• AP: 802.11ac AP
802.11ax .
. AP 'Agile Multiband'
OFDMA MIMO
AP MCS5
. AP
2.4GHz
20, 40, 80MHz .
• 20MHz : IoT
.
.
802.11ax
.
WiFi
.
.
.
.
. 100
40% .
Aruba 802.11ax
. ( SS 2
.)
32: (BSS)
백서 802.11A
X
30
33: (BSS)
.
.
802.11ax
. Aruba
.
좁은 채널(OFDMA)
34:
백서 802.11A
X
31
AP WLAN 40MHz
80MHz 20MHz
.
BSS
, AP
. OFDMA
,
.
. OFDMA
OFDMA .
MIMO
. 802.11n MIMO
, 802.11ac Wave 2 Multi-User
MIMO , 802.11ax OFDMA
.
MU-MIMO SNR
OFDMA
.
20MHz OFDMA TWT
.
WiFi BLE(Bluetooth Low-Energy)
.
802.11 , bps/Hz
LTE 5G ,
Hz
.
, WiFi
. MIMO .
35: 802.11 , bps/Hz
백서 802.11A
X
32
RF 802.11ac
. FCC 2014
5150~5250MHz
5600~5650MHz
. DFS .
WiFi WiFi
.
36: 802.11ax 5GHz ( )
WiFi
. 802.11ax WiFi
, 2019 2024 5
802.11 .
WiFi 80 30
. PC WiFi
WiFi ,
,
.
WiFi
.
.
(IoT)
.
IoT , ,
.
WiFi ' ah'(IEEE
802.11ah ) .
. 'ah'
. WiFi IoT
. 802.11ax IoT ,
WiFi
.
. FCC
CBRS('citizens broadband radio service')
, 3.5GHz
. CBRS
.
LTE 5G ,
WiFi .
백서 802.11A
X
33
.
5G ,
, ,
. WiFi
2.4 5GHz .
. WiFi
2.4GHz ' '
. 2017~2019
6GHz
.
.
WiFi
.
WiFi
5G
. LTE
5G ,
, ,
WiFi
. 5G WiFi 802.11ax
, WiFi
. WiFi 5G
.
WiFi
. 20 WiFi
. WiFi
802.11ax ' '
WiFi
.
BSS ,
WiFi
.
, ,
.
OFDMA IoT
TWT
. 20MHz
.
,
WiFi
. 5G
4G 5G WiFi
.
?
WiFi
. 802.11ax WiFi
.
WiFi
.
( Wave 2 802.11ax )
802.11ax 802.11ac MIMO
802.11ac MIMO 802.11ax
. .
802.11ax Wave 1 MU-MIMO ,
Wave 2 MU-MIMO .
백서 802.11A
X
34
37: SU MIMO ,
802.11ax AP .
802.11ac .
38:
백서 802.11A
X
35
802.11ax Wave 2 - MU-MIMO
Multi-User MIMO . .
39: Uplink multi-user MIMO transmission
Multi-User MIMO
AP
.
AP
.
OFDMA
Wave 2 .
802.11ax Wave 2 - MU-MIMO OFDMA
MU-MIMO OFDMA
,
Wave 2 .
802.11ax Wave 2 -
WiFi CSMA/CA
. AP
.
WiFi
. CSMA/CA WiFi .
. ,
(BSS
, ) .
WiFi
CSMA/CA . WiFi ' '
,
.
BSS CSMA/CA
.
백서 802.11A
X
36
40: BSS :
.
. AP BSS
' '
. AP
RF
AP
. 80MHz (802.11ac
) 5GHz
.
AP , AP
. CSMA/CA
AP
AP
.
BSS ' BSS' ' BSS'
CSMA/CA . 2
2 NAV(
)
.
. SINR(
)
.
.
WiFi
.
802.11ax 'BSS '
, ' ' AP
. 802.11ax
.
802.11ax Wave 2 -
802.11ax
.
.
41: BSS :
백서 802.11A
X
37
42:
HE-SIG-A .
SS(Spatial Stream)
.
(1.6usec 3.2usec)
.
.
• 10MHz (106-RU )
• , (
)
• DCM(
). 802.11ax .
Wave 2 .
-
3GPP 3rd Generation Partnership Project
AC
ADI
A-MSDU MAC
A-MPDU
AP
BAR
BCC
BQRP
BRP
BSRP
CP
CSI
CSMA/CA ( )
CTS Clear To Send
DCM
DFS Dynamic Frequency Selection
DL
EIRP
ER
FCC
FDD
FFT
GCR
GI Guard Interval
HE
HT High Throughput
HEW
LTF
MIMO ,
NDP Null
OFDM
OFDMA
L-
LDPC
MAC Medium Access Control
MCS
MU
백서 802.11A
X
3388
RF
RSSI
RTS
RU
SINR
SNR
STA
STF
STS Space-Time
STBC Space-Time Block Coding
SU
TCP/IP /
TDD
NAV TDM
NDP Null TDMA
NDPA Null UL
PE VHT Very High Throughput
PLCP Physical Layer Convergence Protocol WiFi
PPDU PLCP WISP
3333 SCOTT BLVD | SANTA CLARA, CA 95054
1.844.473.2782 | T: 1.408.227.4500 | FAX: 1.408.227.4550 | [email protected]
www.arubanetworks.com WP_802.11ax_053018
-
• IEEE 15/0132r15 Specification Framework for TGax ,
2016 5
• IEEE P802.11ax /D2.0 Draft Standard for Information
technology , 2017 11
• WiFi Alliance Marketing Requirements Document for
Interoperability Testing of WiFi ax , version 1.1, 2017
11 ( )
• WiFi Alliance Marketing Requirements Document for
Interoperability Testing of Approved ax Products, Draft
Appendix: ax Feature Descriptions , version 1.4, 2017
( )