Next Generation Wi-Fi Cabling Needs and Standards
Explore the potential cabling requirements and new standards needed to support higher data rates of 802.11ax/ay systems and beyond, focusing on backhaul rates and throughput demands. Considerations include supporting multiple STAs per AP, large aggregated traffic loads, and high-capacity backhaul for future Wi-Fi products and systems.
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April 2018 doc.: IEEE 802.11-18/0738r0 Cabling Needs for Next Generation Wi-Fi Date: 2018-04-27 Authors: Name Eldad Perahia Affiliations Aruba, an HPE company Address Phone email eldad.perahia@hpe.com Submission Slide 1 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Abstract Examine 802.3 rates to support next generation Wi-Fi AP s and systems. Submission Slide 2 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Overview With the higher data rates of 802.11ax/ay systems and beyond, we need to examine the potential need for new 802.3 standards to support cabling requirements of 802.11 APs and distribution systems The question is similar to the one asked a few years ago, which led to the development of 802.3bz for 2.5 and 5Gb/s operation over balanced twisted pair wiring. 802.3bz is now a completed amendment. Submission Slide 3 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Example Usage Models for Recent Amendments Requiring increased Backhaul Rates Many of the 802.11ax usage models [1] indicate high number of STAs per AP with the potential for large aggregated traffic load, e.g. Usage 1a 200 users at 20 Mbps Several 802.11ay usage scenarios [2, 3] will also require high capacity backhaul to manage the increase in traffic In [2] Usage Model 5 Video/Mass-Data Distribution/Video on Demand System requires backhaul to 11ay interfaces deployed in ceilings of large room/space In [3], the mmWave distribution network using fiber as backhaul could implemented with Ethernet over optical fiber Submission Slide 4 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Maximum PHY rates 2.4 GHz 11ax 2.2941 Gbps (40 MHz, 8SS, MCS11, 0.8usec GI) 5 GHz 11ax 9.6078 Gbps (160 MHz, 8SS, MCS11, 0.8usec GI) 60 GHz 11ay 277.2 Gbps (8.64 GHz, 8SS, SC MCS20, Short GI) 303.3 Gbps (8.64 GHz, 8SS, OFDM MCS 19, Short GI) Submission Slide 5 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Reality of Products and Deployments Estimate of a future tri-band high-end AP: 2.4 GHz 11ax 20 MHz, 4SS, MCS11, 0.8usec GI = 573.5 Mbps 5 GHz 11ax 160 MHz, 6SS, MCS11, 0.8usec GI = 7.2059 Gbps 60 GHz 11ay 2.16 GHz, 2SS, SC MCS20, Short GI = 17.325 Gbps Summing across the bands (assuming simultaneous operation) and converting to throughput (with MAC overhead of 70%) gives a total throughput of 17.6 Gbps Slide 6 Submission Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 Throughput Requirement of 802.3 To support next generation Wi-Fi systems and products would require 802.3 to support 802.11 throughput of 17.6 Gbps Since 802.3 is full duplex, the maximum rate would depend on the upstream vs. downstream 802.11 traffic mix In the worst case, if we assume peak traffic in one direction, we would require 802.3 to support >17.6 Gbps Submission Slide 7 Eldad Perahia, Aruba, an HPE company
April 2018 doc.: IEEE 802.11-18/0738r0 References [1] 13/0657r6, Usage models for IEEE 802.11 High Efficiency WLAN study group (HEW SG) Liaison with WFA [2] 15/0625r7, IEEE 802.11 TGay Use Cases [3] 17/1019r2, mmWave Distribution Network Usage Model Submission Slide 8 Eldad Perahia, Aruba, an HPE company
