Submission

doc.: IEEE 11-14/0579r1

Joseph Levy (InterDigital)

Date: 2014-05-13

A Backhaul Use Case for NG 11ad

May 2014

Slide 1

Name Affiliations Address Phone email Joseph Levy InterDigital

Communications, Inc.

2 Huntington Quadrangle; 4th Floor, South Wing; Melville, NY, USA; 11747

+1.631.622.4139

joseph.levy@interdigital.com

André Bourdoux IMEC Kapeldreef 75, 3001 Leuven, Belgium

+32-16-288-215

Andre.Bourdoux@imec.be

James Gilb Tensorcom 2724 Loker Ave W. Carlsbad, CA 92010

+1-858-229-4822

gilb@ieee.org

Gal Basson Wilocity gal.basson@wilocity.com

Authors:

Submission

doc.: IEEE 11-14/0579r1May 2014

Joseph Levy (InterDigital)Slide 2

Abstract

This contribution provides an overview of a Backhaul use case in support of a next generation (NG) Enhancements for Very High Throughput in the 60 GHz Band (11ad). Some supporting enabling technology is also reviewed.

Submission

doc.: IEEE 11-14/0579r1May 2014

Joseph Levy (InterDigital)Slide 3

Agenda

• Introduction: Market need for small-cell backhaul

• Requirements for small-cell backhaul

• NG 802.11ad possible backhaul configuration and capabilities

• Enabling Technologies

• Conclusions

Submission

doc.: IEEE 11-14/0579r1

Introduction: Small Cells are Coming• The growth of demand for mobile device traffic is well

documented and accelerating rapidly, a compound growth rate of 61% is predicted [1] (10.8x, in 5y, ~100x for 2010 to 2020)

• To support this growth in data demand there must be growth in spectrum, spectrum efficiency, and density.

Slide 4

May 2014

Cisco Forecast of Mobile Device Traffic [1]

• There is limited available growth in spectrum and spectrum efficiency available. Density offers the best path to growth [2].

• Only Small Cells can provide the density growth needed.

Joseph Levy (InterDigital)

Submission

doc.: IEEE 11-14/0579r1May 2014

Slide 5

Small Cells Need: High Rate, Low Cost Backhaul• Low total cost of operation (TCO)• High capacity (~2Gbps peak per small-cell by 2020)• Small-footprint – Strict space and weight requirements for

deployment on street furniture (zoning requirements)• Flexibility and quick installation by semi-skilled personnel

NG 802.11ad: Can Provide This Backhaul• Low-cost 802.11ad NG chipsets will allow for reuse of high

volume consumer electronics investment, keeping cost low• ABI Research: 1.5 billion WiGig devices by 2018

• 802.11ad NG can provide the high capacity required• High gain electrically steerable antennas will be available

• Enabling small antenna footprint• Providing greater flexibility and longer range

Joseph Levy (InterDigital)

Submission

doc.: IEEE 11-14/0579r1May 2014

Slide 6

To Achieve 100X Growth by 2020

NGMN recommendation for conservative lower Bound:Backhaul for N cells = Max [peak + (N-1) x mean, N x mean]

~ 5X more spectrum

~ 10X spatial reuse

~ 2X spectral efficiency

= 100Xx x

We estimate:

Extrapolated from: NGMN: “Guidelines for LTE Backhaul Traffic Estimation” [3], assuming 5x channels, 2x spectral efficiency improvement to 2X2, 20 MHz, cat 4 tri-cell w/IPsec.

Per Small-cell backhaul (2020) Mbps

Mean Peak

U/L 819 1471

D/L 546 586

Total 1365 2057

Therefore we estimate per Small-cell backhaul needs to be:

Joseph Levy (InterDigital)

Submission

doc.: IEEE 11-14/0579r1

Requirements for small-cell backhaul (1)

Slide 7 Joseph Levy (InterDigital)

May 2014

•Per-cell data rates require backhaul of ~1.4Gbps (mean 2020)

•Assuming 5 small-cells are daisy-chained along a street, to reach an operator point of presence:

•The data rate requirement for an aggregation point is: ~7.5Gbps

•Therefore to support data rates beyond 2020 and allow for growth

•A data rate requirement for an aggregation point of > 7.5Gbps should be supported.

π/2-BPSK 1 SC 1/2 0.77 1.54 3.1π/2-BPSK 1 SC 3/4 1.155 2.31 4.6π/2-QPSK 1 SC 1/2 1.54 3.08 6.2π/2-QPSK 1 SC 3/4 2.31 4.62 9.2

π/2-16QAM 1 SC 1/2 3.08 6.16 12.3π/2-16QAM 1 SC 3/4 4.62 9.24 18.5

64QAM 1 OFDM 3/4 6.2 12.4 24.8π/2-BPSK 2 SC 1/2 1.54 3.08 6.2π/2-BPSK 2 SC 3/4 2.31 4.62 9.2π/2-QPSK 2 SC 1/2 3.08 6.16 12.3π/2-QPSK 2 SC 3/4 4.62 9.24 18.5

π/2-16QAM 2 SC 1/2 6.16 12.32 24.6π/2-16QAM 2 SC 3/4 9.24 18.48 37

64QAM 2 OFDM 3/4 12.4 24.8 49.6π/2-BPSK 4 SC 1/2 3.08 6.16 12.3π/2-BPSK 4 SC 3/4 4.62 9.24 18.5π/2-QPSK 4 SC 1/2 6.16 12.32 24.6π/2-QPSK 4 SC 3/4 9.24 18.48 37

π/2-16QAM 4 SC 1/2 12.32 24.64 49.3π/2-16QAM 4 SC 3/4 18.48 36.96 73.9

64QAM 4 OFDM 3/4 24.8 49.6 99.2

Modulation NSS PHY Code RateData Rate (Gbps)

BW=1.76GHz BW=3.52GHz BW=7.04GHz

From [4]

Modulation NSS PHY Code Rate

Data Rate (Gbps)

BW= 1.76 GHz BW=3.52 GHz BW=7.04 GHz

2 SC 1/2 3.08 6.16 12.3

2 SC 3/4 4.62 9.24 18.5

2 SC 1/2 6.16 12.32 24.6

2 SC 3/4 9.24 18.48 37

Submission

doc.: IEEE 11-14/0579r1

Additional Requirements (2)

Slide 8 Joseph Levy (InterDigital)

May 2014

•Typical small-cell ISD 100-200m

• From 500m dense macro ISD today to ~150m ISD (10x increase in density)

•Link Reliability – Three 9’s

Submission

doc.: IEEE 11-14/0579r1

NG 802.11ad - Backhaul configuration

Slide 9 Joseph Levy (InterDigital)

May 2014

LMDS/E-band

SmallCell

SmallCell SmallCell SmallCell SmallCell SmallCell SmallCell SmallCell SmallCell SmallCell

FTTC

SmallCell

Submission

doc.: IEEE 11-14/0579r1

Joseph Levy (InterDigital)

Phased-array module

May 2014

Slide 10

4-antenna path single-chip transceiver

Demonstrated with externalPHY/MAC baseband chip

40nm LP CMOS Supports QPSK and QAM16 up to MCS12 (4.62Gbps)

Current prototype with 4 antenna’s scaled up to achieve larger range!

Chip currently redesigned for 2x2 MIMO+beamforming in28nm HPM CMOS

Technology is ready for large beamforming arrays

Submission

doc.: IEEE 11-14/0579r1

MAC/PHY Module

• 4 Antennas

• High rate – 2.5 Gb/s

• 250 mW peak power

• Contains both PHY and MAC

Slide 11 Joseph Levy (InterDigital)

May 2014

Submission

doc.: IEEE 11-14/0579r1May 2014

Joseph Levy (InterDigital)Slide 12

Conclusions

• As the need for wireless data grows, small cells will provide a means to increase capacity in dense environments

• Low cost and high performance wireless backhaul technology is required to support the growth of small cells

• NG 802.11ad will enable data rate growth to support the future required data rates required for small cell deployments.

Submission

doc.: IEEE 11-14/0579r1May 2014

Joseph Levy (InterDigital)Slide 13

References

[1] Cisco Visual Networking Index: Global Mobile Data traffic Forecast Update, 2013-2018; Cisco; 5 February 2014

[2] The Myth of Spectrum Scarcity; Martin Cooper; March 2010

[3] Guidelines for LTE Backhaul Traffic Estimation; NGMN (next generation mobile networks) Alliance; 3 July 2011

[4]11-14/0136r2; Beyond 802.11ad – Ultra High Capacity and Throughput WLAN 2nd presentation; Gal Basson (Wilocity), et al; January 2014