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

2. 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 4G 2

3. 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

4. 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

5. 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?

6. Spectrum for Backhaul 6 - 38 GHz (licensed) 60 GHz unlicensed (free)
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
Traditional MW Frequencies
MMW Frequencies

7. mmW Propagation 60GHz: 80GHz: Neither is impacted by:
Absorption of O2 ~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
Drizzle 0.25mm/h
80 GHz

8. 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”
5.8 GHz = 1,140’ 1 mi
60GHz 
5mm
5” antenna 3dB / GA
1.0 / 35dBi
10” antenna 3dB / GA
0.5 / 40dBi
60 GHz = 128’ 1 mi 8

9. 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

10. 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
O2 effect
Antenna directionality
Excellent frequency reuse
Good fit for urban environment
Aesthetic, “concealed” solution
Small footprint 10

11. Picohaul Form Factor 4” diameter “pipe” delivers 1 GBps up to ½ mile
< 3o beam width
> 30 dBi gain
Alignment hardware built-in
Stackable
Can incorporate RAN antenna
Future-proof design
Migrate to electronic alignment 11
© BridgeWave Communications Confidential and Proprietary |

12. Mounting Options
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)
© BridgeWave Communications | COMPANY CONFIDENTIAL 12 12
© BridgeWave Communications Confidential and Proprietary |

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

14. 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 |

15. BridgeWave Communications
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
Corporate Headquarters: Santa Clara, CA, USA

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

17. The High Capacity Market Leader
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 Communications Confidential and Proprietary | 17

18. BridgeWave 4G Backhaul Solutions
Focused on solving tough backhaul challenges facing next-gen networks
Introduced FlexPort80 in – flagship carrier class product
Introduced GigE microwave (18 – 23 GHz) multi-channel products – Q4 2010
Introduced 3 Gbps FlexPort80 solution – Q
Introduced 60 GHz PicoHaul – small cell backhaul solution – Q1 2011
Millimeter Wave
Microwave
PicoHaul

19. Thank You Amir Makleff President & CEO BridgeWave Communications
For more information:
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BridgeWave Communications, Inc Thomas Road Santa Clara, CA 95054
Sales: Fax:
BridgeWave Communications, Inc.
3350 Thomas Road
Santa Clara, CA U.S.A.
Tel: +1 (408)
Fax: +1 (408)