the role of wi-fi in 5g networks - johannesberg summit · pdf fileslide title 70 pt capitals...

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CAPITALS

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The Role of Wi-Fi In 5G networks

Stephen G. Rayment Head, Technology, Wi-Fi and Mobile Enterprise May 2014

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The Role of Wi-Fi in 5G Networks | © Ericsson AB 2014 | 2014-05-13 |

›  Wi-Fi background and status

›  IEEE 802.11 HEW

›  Wi-Fi and cellular integration

›  Other 802.11 technologies

›  Conclusions

Outline

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Wi-Fi technology Evolution

Mb/

s

10,000

1000

100

10

0.1

1

1998 2000 2002 2004 2006 2008 2010 2012

802.11ac

802.11g

802.11b

802.11

802.11n

Graph shows initial commercial availability and maximum PHY data rates

› Relentless increases in throughput at roughly constant low(!) price

› 5x throughput every ~3 years

› Focus has been on data rates for a single link

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Wi-Fi Market

Annual Wi-Fi and WiGig Chipset Shipments (billion)

4

3

2

1

0 2010 2018

Source: ABI Research

Tri-band 11ad (60 GHz) 11ac (5 GHz) 11n (2.4 GHz)

Dual-band 11ac (5 GHz) 11n (2.4 GHz)

Dual-band 11n (2.4 and 5 GHz)

Single-band 11n (2.4 GHz)

› 7 billion chipsets shipped cumulative total YE 2013

› Forecasts call for another 7 billion in 3 years

› Enterprise Wi-Fi – US$3B in 2013 › Carrier Wi-Fi – US$1.1B in 2013 › 10.5M hotspots by 2018

› Recent push into Internet of Things

2011 2012 2013 2014 2015 2016 2017

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Unlicensed SpectruM Currently 555 MHz at 5GHz

Courtesy IEEE

144

140

136

132

128

124

120

116

112

108

104

100

165

161

157

153

149

64

60

56

52

48

44

40

36

20 MHz 40 MHz 80 MHz

160 MHz

U NII-1 U NII-2A U NII-2C U NII-3

5250 MHz

5350 MHz

5470 MHz

5725 MHz

U NII-2B

96

92

88

84

80

76

72

68

169

173

177

181

5825 MHz

5925 MHz

U NII-4

Currently available channels

FCC proposed new channels

DFS Weather Radar

IEEE channel #

5150 MHz

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IEEE 802.11ac 1 Gb/s Wi-Fi at 5GHz

Wide channel bandwidth 80 or 160 MHz

High-order modulation 256 QAM

Non-contiguous channelization

Multi User MIMO

›  Increased data rate ›  1.3 ~ 3.6 Gb/s PHY rate

›  Increased data rate at short distance

›  Effective use of spectrum

›  Network capacity and spectral efficiency with single radio devices

Additional MIMO Streams ›  802 standard supports up to

8 streams, 3 and 4 being certified

Certification of

IEEE 802.11ac

happens in

two releases

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› HEW Study Group created in March 2013 to enhance 802.11 PHY and MAC in 2.4 and 5 GHz:

–  Improve spectrum efficiency and area throughput –  Improve real world performance in indoor and outdoor deployments

› 802.11ax Task Group approved in March 2014 with scope: – At least 4X improvement in average throughput per device over current

systems in dense deployment scenario – Maintain or improve power efficiency – Operate in frequency bands between 1 and 6 GHz – Maintain backward compatibility and coexistence – Outdoor operation limited to stationary and pedestrian speeds

IEEE HEW History High Efficiency WLAN

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IEEE 802.11ax Current status

Many technologies being discussed ›  Dynamic sensitivity control ›  OFDMA ›  UL-MIMO ›  Scheduling ›  In band duplex ›  Hybrid ARQ

Current work ›  Channel models ›  Simulation scenarios ›  Evaluation methodology

› Estimate standard complete July 2018 › Participation from operators, chip vendors, OEMs and universities

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The Wi-Fi Efficiency Challenge Simulation comparison

See . . . IEEE document 11-13/1123r1

LTE 20+20 MHz, 2x2 DL and 1x2 UL MIMO

Wi-Fi 802.11n, multiples of 20 MHz, 2x2 MIMO CS threshold -85dBm

Typical enterprise setting 80x50m, four floors, walls every 10m 250 users per floor, eight APs per floor

0 5 10 15 20 25 Served Traffic per Small Cell (95% 5Mbps) [Mbps]

Downlink

LTE, 2GHz

Wi-Fi, 2.4GHz reuse 3, no interf

Wi-Fi, 2.4GHz reuse 3, 50% interf

Wi-Fi, 5GHz reuse 12, no interf

Wi-Fi, 5GHz reuse 12, 50% interf

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Wi-Fi Cellular Integration Wi-Fi becomes ‘just another RAT’

PDN GW

Wi-Fi AC

Wi-Fi GW

AAA HLR PCRF

3GPP RAN

Wi-Fi RAN 3GPP Core

RAN Integration

Core

Integration picoRBS

Core Integration for: •  Authenticating and charging subscriber •  Policy decision and enforcement •  Deep packet inspection, lawful intercept, etc. •  End to end QoS •  Session mobility between RANs •  Ericsson products, 3GPP ANDSF, SaMOG

RAN Integration for: •  Steering of users between RANs depending on

e.g. signal quality and load •  Improve end user experience and network

performance •  Ericsson products, 3GPP RAN2, Wi-Fi Alliance

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Unlicensed Band Aggregation

LTE Wi-Fi Aggregation - RAN aggregation - IP aggregation - MPTCP

LA-LTE - Spectrum supplement for licensed

bands - Common MAC/PHY + RRM

LTE

+

Wi-Fi

S1 +

LTE

LA-LTE

S2

Release 13

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IEEE 802.11ad WiGIG is now Wi-Fi at 60GHz

› 2.16MHz channel bandwidth › Typically 4 channels › 385 Mb/s ~ 6756 Mb/s › BPSK ~ 64-QAM › Line of sight, in room, very high throughput

applications › e.g. wireless USB, SD card and HD display

extension › With high gain antennas can be used for

P2P wireless backhaul ›  IEEE standard ratified in 2013 › Wi-Fi Alliance has several certification

programs near launch

China

Japan

Korea

Australia

Europe

Canada /USA

55 56 57 58 59 60 61 62 63 64 65 66 67 GHz

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IEEE 802.11AH Wi-Fi for M2M and IoT

Bandwidth

150Kbps – 4Mbps

650Kbps – 7.8Mbps

1.35Mbps – 18Mbps

2.9Mbps – 39Mbps

5.8Mbps – 78Mbps

PHY Rate

16 MHz

8 MHz

4 MHz

2 MHz

1 MHz

› For license exempt bands below 1 GHz

› Enhancements for short packets, reduced power, huge # of devices

› e.g. machine type communications, home automation, wearable devices

› Extended range connectivity up to 1 km?

›  IEEE Draft 2.0 expected to go for letter ballot in May 2014 target completion March 2016

› WFA recently started to define certification program

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› Wi-Fi is a major consumer and enterprise technology to be reckoned with › Access to a large and growing amount of unlicensed spectrum › Performance and efficiency will continue to improve, e.g. with HEW › Ericsson a leader in integrating Wi-Fi and cellular technologies at many levels › Wi-Fi will be an element of the evolution of mobile broadband for 5G › Other 802.11 technologies may play a role in the MTC elements of 5G

Conclusions

Wi-Fi Will Continue to complement and be synergistically integrated with cellular technology

as we Advance to 5G

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