IEEE ax：第 6 世代の Wi-Fi テクニカルホワイトペーパー

Size: px

Start display at page:

Download "IEEE ax：第 6 世代の Wi-Fi テクニカルホワイトペーパー"

かんじたかぎ
5 years ago
Views:

1 IEEE ax 6 Wi-Fi 1 6 Wi-Fi IEEE ax ac IEEE ax LTE IEEE ax LAN WLAN Wi-Fi IEEE ax LAN 4K Ultra HD Internet of Things IoT ac IoT IEEE ax QAM 35% OFDMA RSSI IEEE ax OFDMA Wave ax Mbps MAC ac ax 2.4 GHz 5 GHz 2.4 GHz ax 2.4 GHz Wi-Fi

2 ax? ax ax 3.3 IEEE ax IEEE ax OFDMA QAM Spatial Reuse SR OBSS ax 5 11ax ax IEEE ax ax a/g/11n/11ac OFDMA EDCA/CSMA Cisco a/g/11n/11ac Wireless Intrusion Protection Switching [WIPS] / ax IEEE ax a/n/ac HE-SIG-A/B a/g/n/ac request-to-send/ clear-to-send RTS/CTS ax K/8K AR/VRIoT Wi-Fi 2G 3G 4 G Wi-Fi Wi-Fi G ax Wi-Fi 1 6

3 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 ax IoT 2 2. IoT Cisco VNI Bluetooth Wi-Fi 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.

products/collateral/wireless/aironet-3600-series/white-paper-c11-713103.

4 AR VRMR IT 1 Gbps ax Multiple Input, Multiple Output MIMO 8 x AR + QoE AR / VR / ax? ax ac ac products/collateral/wireless/aironet-3600-series/white-paper-c pdf DL MU MIMO 256 QAM ac 160-MHz ax IEEE ax ac High-Efficiency Wireless HE ax 1 Wi-Fi Wi-Fi Quality of Experience QoEKPI UHD 4K / AR/VR

5 IoT IT HVAC URLLC KPI / ax 4 IEEE ax 1024 QAM PHY 256 QAM 1024 QAM 10/8 = QAM 256 QAM 1024 QAM 256 QAM µs Ts ns 2 GI Ts 12.8 µs µs Ts GI + Ts 11ac 3.2 µs/ 3.2 µs ns = ax / = ax 80 MHz 13.6 µs Ts + GI 980 OFDMA ac 80 MHz 3.6 µs 234 OFDM ac 10% (980/13.6)/(234/3.6) = 1.1 RF RF 1/ GHz 1.9 cm 3/4 RF ax Wave ax ac ac ax PHY OFDM 800ns GI 1 SS 3 SS 4 SS 8 SS ac MHz 5/6 log Mbps 1.17 Gbps 1.56 Gbps MHz X = / Mbps Gbps ax MHz 5/6 log Mbps 1.8 Gbps 2.4 Gbps 4.8 Gbps 2 x 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.

6 3.3 IEEE ax 1024 QAM Basic Service Set BSS BSS OBSS CCI RF LOS ax OFDMA OFDMA Wi-Fi /LTE OFDMA DL UL TXOP Enhanced Distributed Channel Access EDCA UL-OFDMA 11ax ac ac EDCA 4 Multiple-Input-Multiple- Output MIMO Multiuser Physical layer Protocol Data Unit MU-PPDU ax ac ac Wi-Fi MHz OFDM PPDU OFDMA ax 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.

7 3 OFDMA QoS ac PPDU TXOP UL-PPDU KPI OFDMA LTE RB 5G ax ac QoS U-APSD Wi-Fi Multi Media Power- Save WMM-PS Traffic Indication Message TIM IoT ax ax OFDMA Target-Wakeup Time TWT TWT IoT 5 5. Target Wakeup Time TWT STA 1 AP STA1 STA2 TWT UL-OFDMA TWT CCI IEEE ax 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.

8 802.11ax OBSS Packet Detection OBSS-PD BSS / BSS BSS CCA TXP 6 6. OBSS & BSS AP/STA ax 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 ax ac 1 OFDMA ax PHY OFDMA SNR ac 20 MHz ax 2 MHz 8 db 8 db ax 8 db IoT

9 GI PHY OFDM OFDM ISI /LTE 2 2 Wi-Fi IoT 4G LTE 5G-NR Wi-Fi 7 RF DS ns RF 1 LOS 1 km µs802.11ax LTE OFDMA ISI OFDMA ax ac 0.8 µs 1.6 µs 3.2 µs 7. PHY 3.2 us 0.8 us GI 12.8 us us GI OFDMA OFDMA PPDU STA ax 26 2 MHz 2 x MHz ax MIMO 1 8 SS STA 8

10 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 ac ax PPDU ax LTE QoS ax / IoT STA STA

11 ac STA STA ax 1500B ac ac TXOP ac TCP ACK 9. STA ax ac 1500 B/100 B 11ax /11ac QAM ax 1024 QAM 1024 QAM 3/4 5/6 2 MCS ac 256 QAM 10/ ax 1024 QAM 2,500 5, Gbps HMD 50 SNR 6 db ac ax 8 Tx 8 Rx MRC Wi-Fi 10 Ekahau 1024 QAM MCS 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.

12 10. Ekahau Spatial Reuse SR OBSS CSMA RF STA Quality of Experience QoE STA RSSI CS ax 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

13 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 ax a/g/n/ac ac 8 db 26 2 MHz IEEE ax 2-MHz 5-GHz NLOS MCS7 MCS6 MCS5 MCS4 MCS3 MCS2 MCS1 MCS ac 20 MHz ac 2 MHz

14 4 11ax IEEE ax IEEE Wi-Fi Alliance IEEE ax Wi-Fi Alliance IEEE Wave ax 5.1 IEEE ax a/g/n/ac ax n a ax a/g/n ac ax a/g/n ac PPDU a/g/n acs ac ax a/g/n ac PPDU a/g/n IEEE ac ax ax a/g a/g/n ac CCA ax ax PPDU PPDU a/g PPDU Ack Block Ack ax PPDU Ack Block Ack EIFS Ack Block Ack ax 4µs L-STF L-LTF L-SIG RL-SIG HE-SIGA HE-SIGB HE-STF HE-DATA 4x 12.8 us + GI MCS ax PPDU CTS-to-self RTS/ CTS ax ax CTS-to-self RTS/CTS ax RTS/CTS MU-RTS PPDU STA NAV MU-RTS PPDU STA CTS PPDU ac RTS/CTS ax

15 ax 2 MU-MIMO 80 MHz Mbps IEEE ac 1024 QAM 8 SS Mbps IEEE ax IEEE ac IEEE ax LAN Wi-Fi ax ax 2019 IEEE ax 4K/8K 10 UHD AR/VR IoT ac Wave ac Wave 2 LAN WAN ac ax IoT ax ax 6 IEEE ax LAN 6 Wi-Fi IT/IoT 4K/8K / Wi-Fi ax ax ax LAN ac Cisco R C /18

MIMOからMassive MIMOを用いた伝送技術とクロスレイヤ評価手法

MIMOからMassive MIMOを用いた伝送技術とクロスレイヤ評価手法 802.11 LAN MIMOMassive MIMO Wi-Fi 20 OFDMorthogonal frequency division multiplexing IEEE 802.11 LAN MIMOmultiple input multiple output LAN MIMO MIMO LTElong term evolution IEEE 802.11n MIMO LAN LAN MIMO

IEEE ax：第 6 世代の Wi-Fi テクニカル ホワイト ペーパー

IEEE ax：第 6 世代の Wi-Fi テクニカルホワイトペーパー