BridgeWave Communications 4GWE Keynote Session – Small Cell Backhaul Options September 13, 2011

New 4G Paradigm  Mobile networks up to 3G focused on coverage not capacity  Macro-cell approach was adequate, 3-5 km radius Access = 100Mbps Aggregation = 300 Mbps  4G is all about capacity  Mbps to handsets  170 Mbps per LTE sector  Higher backhaul rates needed e.g. 1 Gbps  Data rates to devices affected by distance from base station  Ubiquitous, high speed coverage requires divergence from macro-cell model 2 2

Small-Cell Drivers  To meet 4G capacity needs, higher base station densities are required  The only way to achieve this economically is to deploy small and inexpensive cells around the macro-cell

Small Cell Backhaul Challenges  Deployments required in diverse locations  Large number of nodes required due to coverage needs  Environment & Aesthetics  High capacity – up to 1 Gbps  Low cost (CAPEX & OPEX)  Short deployment lead time

Small Cell Backhaul Options  Fiber  Likely to address < 30% of small cell locations  Copper  Not enough copper pairs available to most locations  Wireless <6 GHz (NLOS)  Unlicensed (2.4/5.8 GHz) subject to interference  Licensed – scarce and expensive resource (access)  Microwave frequency band (6 – 38 GHz)  Licensing and equipment cost  Regulated min antenna size  Limited capacity ….what about millimeter wave?

Spectrum for Backhaul  GHz (licensed)  Per link license typically $2K fee  Long distance 6 GHz up to 50 miles, 38 GHz up to 3 miles  Optimized for speeds up to 350Mbps per channel  60 GHz unlicensed (free)  Excellent for short distances (1/2 to 1 mile)  Gigabit speeds and urban environment friendly  70/80 GHz (lightly licensed)  Per link license <$100  Optimized for Gigabit speeds up to 2 miles 6 MMW FrequenciesTraditional MW Frequencies

mmW Propagation  60GHz:  Absorption of O 2 ~14dB/Km  1-2Km for 1Gbps  80GHz:  2-4Km for 1Gbps  Neither is impacted by:  Selective fading (multipath) due to relatively short links  Fog (<0.4dB/Km) 60 GHz Excessive rain 150mm/h Heavy rain 25mm/h Fog 80 GHz Drizzle 0.25mm/h

mmW Directivity  High gain and narrow beam-width achieved with small antennas  Typical examples:  Implications:  Security  High interference immunity  High frequency reuse  Comparison of beam 1 mile:  5.8 GHz 24”  60 GHz 10” 60GHz 5mm 5” antenna  3dB / G A  1.0  / 35dBi 10” antenna  3dB / G A  0.5  / 40dBi 5.8 GHz = 1,140’ 1 mi 60 GHz = 128’ 1 mi 8

The Aesthetics Challenge  Traditional parabolic antennas are OK for rooftop/tower/mast deployment  Street-level deployment requires a different approach:  Aesthetic  Concealed / disguised  Small footprint

Why 60 GHz for Small Cell Backhaul?  Ultra-High Capacity  Abundant spectrum available  Low Cost  Equipment enabled by new consumer indoor applications  OpEx and recurring fees (e.g. license)  Robustness  O 2 effect  Antenna directionality  Excellent frequency reuse  Good fit for urban environment  Aesthetic, “concealed” solution  Small footprint 10

 4” diameter “pipe” delivers 1 GBps up to ½ mile  < 3 o beam width  > 30 dBi gain  Alignment hardware built-in  Stackable  Can incorporate RAN antenna  Future-proof design  Migrate to electronic alignment Picohaul Form Factor © BridgeWave CommunicationsConfidential and Proprietarywww.bridgewave.com |

 Same Gbps backhaul solutions - multiple mounting options A: Top of pole B: Side of pole C: BTS Top or inside D: Side of building (wall mount) Mounting Options © BridgeWave Communications | COMPANY CONFIDENTIAL 12 © BridgeWave CommunicationsConfidential and Proprietarywww.bridgewave.com |

Usage Models 13 Macro-cell Level Pico-Cell Level Rooftop Level Macro-cell Street Level Pico-cell

What about line of sight?  30% of links in urban areas will not have LOS  NLOS solutions will be required  Millimeter wave superior when LOS is available  NLOS can be mitigated by planning Daisy-chain, Mesh or Ring topologies © BridgeWave Communications |

BridgeWave Communications Corporate Headquarters: Santa Clara, CA, USA  Focus: High-Capacity & 4G backhaul solutions  Founded in 1999  Privately held  100 Employees  Based in Silicon Valley, CA Clearwire 4G Backhaul, NYC Metro DC Police – Video Surveillance Backhaul

Over 12,000 Systems Deployed in 60 Countries Government Enterprise Education Healthcare Municipalities Service Providers

The High Capacity Market Leader 17 U.S. FCC 70/80 GHz Registrations Data from 1/1/2011 thru 6/30/2011 based on FCC 70/80 GHz Registration Database © BridgeWave CommunicationsConfidential and Proprietarywww.bridgewave.com |

BridgeWave 4G Backhaul Solutions  Focused on solving tough backhaul challenges facing next-gen networks  Introduced FlexPort80 in 2009 – flagship carrier class product  Introduced GigE microwave (18 – 23 GHz) multi-channel products – Q  Introduced 3 Gbps FlexPort80 solution – Q  Introduced 60 GHz PicoHaul – small cell backhaul solution – Q Millimeter Wave Microwave PicoHaul

Thank You Sales: Fax: BridgeWave Communications, Inc Thomas Road Santa Clara, CA BridgeWave Communications, Inc Thomas Road Santa Clara, CA U.S.A. Tel: +1 (408) Fax: +1 (408) Amir Makleff President & CEO BridgeWave Communications For more information: White Papers: Case Studies: Data Sheets: