IEEE 802.11ax 6 Wi-Fi 1 6 Wi-Fi IEEE 802.11ax 802.11ac IEEE 802.11ax LTE IEEE 802.11ax LAN WLAN Wi-Fi IEEE 802.11ax LAN 4K Ultra HD Internet of Things IoT 802.11ac IoT IEEE 802.11ax 3 1024 QAM 35% OFDMA RSSI IEEE 802.11ax OFDMA Wave 1 802.11ax 8 4800 Mbps MAC 802.11ac 802.11ax 2.4 GHz 5 GHz 2.4 GHz 802.11ax 2.4 GHz Wi-Fi
1 2 3 802.11ax? 3.1 802.11ax 3.2 802.11ax 3.3 IEEE 802.11ax 3.3.1 3 3.3.2 3.3.3 3.4 IEEE 802.11ax 3.5 3.5.1 OFDMA 3.5.2 1024 QAM 3.5.3 Spatial Reuse SR OBSS 3.5.4 4 11ax 5 11ax 5.1 5.2 802.11ax IEEE 802.11ax 802.11ax 802.11a/g/11n/11ac OFDMA EDCA/CSMA Cisco 802.11a/g/11n/11ac Wireless Intrusion Protection Switching [WIPS] / 802.11ax IEEE 802.11ax 802.11a/n/ac HE-SIG-A/B 802.11a/g/n/ac request-to-send/ clear-to-send RTS/CTS 802.11ax 2 802.11 4K/8K AR/VRIoT Wi-Fi 2G 3G 4 G Wi-Fi Wi-Fi 2020 5G 802.11ax Wi-Fi 1 6
1. Cisco Virtual Networking Index [VNI] 100 % 80 % 31 % 45 % 48 % 60 % 66 % 40 % 20 % 69 % 55 % 52 % 34 % 0 % 2G 3G 4G 5G Internet of Things IoT IT IoT 5 Wi-Fi IT IoT IoT 802.11ax IoT 2 2. IoT Cisco VNI 18 16 14 10 8 10 12 6 4 2 0 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Bluetooth Wi-Fi 802.15.4 ZigBee Z-wave M2/loT GPS/GNSS NFC NFC RFID
AR VRMR IT 1 Gbps 10 802.11ax Multiple Input, Multiple Output MIMO 8 x 8 3 3. AR + QoE AR 2016 2021 7 3 20 / VR 2016 2021 11 13 140 / 3 802.11ax? 802.11ax 802.11ac 802.11ac https://www.cisco.com/c/dam/en/us/ products/collateral/wireless/aironet-3600-series/white-paper-c11-713103.pdf DL MU MIMO 256 QAM 802.11ac 160-MHz 3.1 802.11ax IEEE 802.11ax 802.11ac High-Efficiency Wireless HE 802.11ax 1 Wi-Fi Wi-Fi Quality of Experience QoEKPI 3 4 802.11 UHD 4K / AR/VR
IoT IT HVAC URLLC KPI / 3.2 802.11ax 4 IEEE 802.11ax 1024 QAM PHY 256 QAM 1024 QAM 10/8 = 1.25 1024 QAM 256 QAM 1024 QAM 256 QAM 2 3.2 µs Ts 400 800 ns 2 GI Ts 12.8 µs 3 0.8 1.6 3.2 µs Ts GI + Ts 11ac 3.2 µs/ 3.2 µs + 400 ns = 88.9 802.11ax 5.9 12.8/ 12.8 + 0.8 = 94 802.11ax 80 MHz 13.6 µs Ts + GI 980 OFDMA 802.11ac 80 MHz 3.6 µs 234 OFDM 802.11ac 10% (980/13.6)/(234/3.6) = 1.1 RF RF 1/3 5.25 GHz 1.9 cm 3/4 RF 1 2 802.11ax Wave 1 802.11ax 8 802.11ac 2 3 1 1. 802.11ac 802.11ax PHY OFDM 800ns GI 1 SS 3 SS 4 SS 8 SS 802.11ac 234 80 MHz 5/6 log2 256 6.67 4 390 Mbps 1.17 Gbps 1.56 Gbps 234 80 MHz X = 780-3.12 / Mbps Gbps - - 802.11ax 980 80 MHz 5/6 log2 1024 8.33 13.6 600 Mbps 1.8 Gbps 2.4 Gbps 4.8 Gbps 2 x 980 160 MHz 1.2 Gbps 3.6 Gbps 4.8 Gbps -
3.3 IEEE 802.11ax 1024 QAM Basic Service Set BSS BSS OBSS CCI RF LOS 802.11ax OFDMA OFDMA Wi-Fi /LTE OFDMA DL UL TXOP Enhanced Distributed Channel Access EDCA UL-OFDMA 11ax 802.11ac 3.3.1 3 802.11ac EDCA 4 Multiple-Input-Multiple- Output MIMO Multiuser Physical layer Protocol Data Unit MU-PPDU 802.11ax 802.11ac 3 802.11ac Wi-Fi 20 40 80 160 MHz OFDM PPDU OFDMA 802.11ax PPDU 4 4. OFDM OFDMA
3 OFDMA QoS 802.11ac PPDU TXOP UL-PPDU KPI OFDMA LTE RB 5G 802.11ax 802.11ac QoS 3.3.2 802.11 U-APSD Wi-Fi Multi Media Power- Save WMM-PS Traffic Indication Message TIM 102.4 IoT 802.11ax 802.11ax OFDMA Target-Wakeup Time TWT TWT IoT 5 5. Target Wakeup Time TWT STA 1 AP STA1 STA2 TWT UL-OFDMA TWT 3.3.3 CCI IEEE 802.11ax BSSBSS OBSS CCI
802.11ax OBSS Packet Detection OBSS-PD BSS / BSS BSS CCA TXP 6 6. OBSS & BSS 802.11 AP/STA 80.2.11ax AP/STA CCA ED -62dBm CCA-ED RSSI BSS OBSS MYBSS CCA-SD BSS CCA SD -82dBm RX OBSS MYBSS RX BSS Basic Service Set OBSS Overlapping BSS TXOP 3.4 IEEE 802.11ax 802.11 1 802.11ac 1 OFDMA 802.11ax PHY OFDMA SNR 802.11ac 20 MHz 802.11ax 2 MHz 8 db 8 db 802.11ax 8 db IoT
GI PHY OFDM OFDM ISI /LTE 2 2 Wi-Fi IoT 4G LTE 5G-NR Wi-Fi 7 RF DS 300 300 ns RF 1 LOS 1 km 3200 3.2 µs802.11ax LTE OFDMA ISI OFDMA 802.11ax 802.11ac 0.8 µs 1.6 µs 3.2 µs 7. PHY 3.2 us 0.8 us GI 12.8 us 0.8 1.6 3.2 us GI 3.5 3.5.1 OFDMA OFDMA PPDU STA 802.11 802.11ax 26 2 MHz 2 x 996 160 MHz 802.11ax MIMO 1 8 SS STA 8
8. OFDMA OFDMA 1. TXOP STA PPDU 2. MU-PPDU STA 3. STA MU-BAR 4. STA M-BA ACK OFDMA 1. STA STA 2. HE STA 3. STA MU-PPDU 4. ACK M-BA 802.11ac 802.11ax PPDU 802.11ax LTE QoS 802.11ax / IoT STA STA
9 802.11ac STA STA 4 802.11ax 1500B 802.11ac 10 802.11ac 2.2 120 TXOP 802.11ac TCP ACK 9. STA 802.11ax 802.11ac 1500 B/100 B 11ax /11ac 3.5.2 1024 QAM 802.11ax 1024 QAM 1024 QAM 3/4 5/6 2 MCS 10 11 802.11ac 256 QAM 10/8 25 802.11ax 1024 QAM 2,500 5,000 4.8 Gbps HMD 50 SNR 6 db 802.11ac 802.11ax 8 Tx 8 Rx MRC Wi-Fi 10 Ekahau 1024 QAM MCS 10-11 256 QAM MCS 8-9
10. Ekahau 3.5.3 Spatial Reuse SR OBSS 802.11 CSMA RF 802.11 STA Quality of Experience QoE STA RSSI CS 802.11ax 4 1. Overlapping Basic Service Set OBSS STA BSS STA STA BSS 2. BSS RF BSS 3. OBSS Packet Detection PD BSS OBSS 4. CCA TX
BSS BSS SIG 6 STA BSS BSS OBSS BSS RSSI BSS BSS RSSI BSS STA STA TXOP HD RF STA IT RF STA Wi-Fi WLAN QoE WLAN BSS BSS CCA RRM STA RF RRM BSS_COLOR OBSS_PD BSS COLOR OBSS_PD QoE HD Wi-Fi 3.5.4 802.11ax 802.11a/g/n/ac 802.11ac 8 db 26 2 MHz 11 11. IEEE 802.11ax 2-MHz 5-GHz NLOS 300 250 200 150 100 50 0 MCS7 MCS6 MCS5 MCS4 MCS3 MCS2 MCS1 MCS0 802.11ac 20 MHz 802.11ac 2 MHz
4 11ax IEEE 802.11ax IEEE Wi-Fi Alliance IEEE 802.11ax 2017 9 2.0 2018 5 3.0 2019 Wi-Fi Alliance IEEE 2.0 2019 Wave 1 5 11ax 5.1 IEEE 802.11ax 802.11a/g/n/ac 802.11ax 802.11n 802.11a 802.11ax 802.11a/g/n 802.11ac 802.11ax 802.11a/g/n 802.11ac PPDU 802.11a/g/n 802.11acs 802.11ac 802.11ax 802.11a/g/n 802.11ac PPDU 802.11a/g/n IEEE 802.11ac 802.11ax 802.11ax 12 802.11a/g 802.11a/g/n 802.11ac CCA 802.11ax 802.11ax PPDU PPDU 802.11a/g PPDU Ack Block Ack 802.11ax PPDU Ack Block Ack EIFS Ack Block Ack 12.802.11ax 4µs L-STF L-LTF L-SIG RL-SIG HE-SIGA HE-SIGB HE-STF HE-DATA 4x 12.8 us + GI MCS 802.11ax PPDU CTS-to-self RTS/ CTS 802.11ax 802.11ax CTS-to-self RTS/CTS 802.11ax RTS/CTS MU-RTS PPDU STA NAV MU-RTS PPDU STA CTS PPDU 802.11ac RTS/CTS 802.11ax
5.2 802.11ax 2 MU-MIMO 80 MHz 290 1300 Mbps IEEE 802.11ac 1024 QAM 8 SS 600 1800 Mbps IEEE 802.11ax IEEE 802.11ac IEEE 802.11ax LAN Wi-Fi 802.11ax 802.11ax 2019 IEEE 802.11ax 4K/8K 10 UHD AR/VR IoT 802.11ac Wave 2 802.11ac Wave 2 LAN WAN 802.11ac 802.11ax IoT 802.11ax 802.11ax 6 IEEE 802.11ax LAN 6 Wi-Fi IT/IoT 4K/8K / Wi-Fi 802.11ax 802.11ax 802.11ax LAN 802.11ac Cisco https://www.cisco.com/go/trademarks 1110R C11-740788-02 06/18