1PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Design & Deployment Considerations for Microwave Backhaul

John ColeDirector, Product Line ManagementMicrowave ProductsAndrew Solutions, A CommScope Company

2PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Case Study Extract

• Interference Case Study of a real network with 10,000 links

• Case Study included 15GHz, 18GHz and 23GHz frequency bands

• Interference and Availability analysis conducted for each band with low quality antennas and then with high quality antennas

• Results showed that when using low quality antennas:• 15GHz band – 19% of the backhaul network failed

• 18GHz band – 29% of the backhaul network failed

• 23GHz band – 21% of the backhaul network failed

3PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Executive Summary

• Interference is a primary cause• Why interference?

• How to prevent it?

Red – Low Quality Antenna

Poor or deteriorating radiation pattern

Green – High Quality Antenna

Good long life radiation pattern

180º

0dB

-180º

Low QualityHigh Quality

Dis

crim

inat

ion

DiscriminationImprovement

4PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Executive Summary

• Backhaul data loss = poor economics• Waste of spectrum

• Cost of repairing dysfunctional backhaul networks

• Subscriber churn

• How you can save millions and keep subscribers happy AND have a ‘greener’ network

5PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Executive Summary

• With these solutions operators can…• Save on spectrum

• Save on repair/replacement bills

• Save on churn = loss of customers/revenue

• Save by using smaller antennas• Leasing charges

• Save by using smaller towers

• Save on freight

• Save on warehousing

6PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Executive Summary

• The solutions…• Design the network with a

high quality planning tool• Optimise spectrum usage

• Ensure sustained network reliability

• Deploy the network with good high quality antennas

• Ones that really are class 3 compliant or better

• Ones that stay compliant with time

7PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Case Study—Results

Interference degradation case study (23GHz)

Good Antenna

Bad Antenna

Over 20% more of the network meets the interference and availability objectives with good antennas

8PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Case Study—Conclusion

• How do you get better spectrum use?• Lower side lobes = higher discrimination

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

0 2 4 6 8 10 12

Thre

shol

d D

egra

dat

ion

(dB

)

Discrimination Improvement (dB)

180º

0dB

-180º

Dis

crim

inat

ion

DiscriminationImprovement

9PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Case Study—Conclusion

• If nearly 30% of the network does not meet the interference and availability objectives using the inferior manufacturer, you have to either..

• Buy larger antennas

• Buy more Spectrum

• Replacing 30% of the antennas with larger antennas results in a 32% increase in overall cost of antennas compared to an efficient network design using high quality antennas

• If you spend $50m on antennas this is an approximate $15m overspend

10PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Low Quality v High Quality Planning Tool

“At Ericsson we had a project to re-design a network that was originally planned by another vendor with a lower quality tool. This led to interference issues and inefficient spectrum usage. We used (a higher quality tool) to re-plan the network saving the operator a significant amount of spectrum.”

Alexander de RooyManager Access Development & Optimization

11PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

Case Study—Conclusion

• Industry Problem• Wasting backhaul spectrum or buying larger than necessary antennas• Large repair bills (soon or in future)• Churning Subscribers

• Solutions• Design the network with a high quality planning tool and save

spectrum• Deploy high quality (good) antennas and immediately save $millions

12PRIVATE AND CONFIDENTIAL© 2010 CommScope, Inc

CommunicAsia 2010Singapore, 15 to 18 June 2010

• Choose a Greener Network

• Choose a High Quality Planning Tool

• Choose High Quality Antennas

Why risk your network investment, Why risk your network investment, increased costs and subscriber base by increased costs and subscriber base by using inferior antennas and planning using inferior antennas and planning

tools?tools?