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					Wireless Transport Network Optimization: Solving the 4G Backhaul Challenge

This document is confidential and is intended solely for the use and information of the client to whom it is addressed.

Solving the 4G Backhaul Challenge

Clearly 4G requires more fiber and microwave in the backhaul network
But how much, and how much of each? Where and how do I get it cost effectively? ILECs, CLECs, MSOs, AAVs? When and how much do I deploy? Do I deploy as TDM or Ethernet?

The answer of course depends on your particular situation
How much bandwidth do I need today, next year, in 5 years? Am I migrating an existing network or building out “greenfield?” Do I have voice traffic considerations or is this purely broadband data? Am I deploying high density urban sites or lower density in rural markets?

This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

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4G Backhaul Rules of Thumb

The higher your bandwidth requirements the more fiber you‟ll need
A 90% microwave architecture can safely support 50-100Mbs per site today Increasing the ratio of fiber hubs will support increased capacities per site At 50% microwave; 50% fiber capacities can grow to 200Mbs+ per site

Planning the RAN and Backhaul together reduces lifecycle costs
Planning the RAN sites with a view towards fiber availability is critical Failure to plan appropriately leads to high fiber and thus backhaul costs This holds true equally for incumbent and green-field providers

You can add more fiber to the Backhaul “diet” as the bandwidth grows
Ethernet is cheaper but packet over SONET (TDM) offers a smoother transition for existing networks with voice traffic migrating to 4G Rural deployments are more costly than urban environments

This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

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3

Fiber Access for 4G Backhaul - Where Do I Get It?

ILECs and MSOs are aggressively building out the fiber infrastructure
Verizon (ILEC) will have fiber to 80%+ of all sites in region by 2012 AT&T (ILEC) has fiber deployed or planned to most high capacity sites Time Warner, Comcast, COX, and other MSOs are adding cell sites to their existing (typically Ethernet) fiber networks These alternatives will offer broad coverage, but uncertain lifecycle costs

CLECs, Utilities, and other Alternative Access Vendors
Over 200 non-ILEC/MSO fiber operators nationwide, over 500 when you count municipal fiber deployments More limited fiber footprint than incumbents but better economics Better opportunity to leverage „owners economics‟ via dark fiber and/or shared build outs, thus providing more predictable lifecycle costs

This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

CFN Services

4

Plan the RAN with a view toward fiber access for backhaul
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CFN Services FiberSource® Deployment Planning Platform
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Los Angeles, CA
This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

CFN Services

5

Initial RAN design with fiber hub sites pre-selected…
CFN Services FiberSource® Deployment Planning Platform

Santa Clarita

Lancaster--Palmdale

# * # *

Victorville--Hesperia--Apple Valley

# *

Camarillo Thousand Oaks Oxnard

Simi Valley

Legend
$
MSC Hubs Ring 1 Ring 2 Ring 3 Ring 4 Ring 5 Ring 6 Ring 7 Ring 8 Ring 9 Ring 10 Ring 11 Ring 12 Ring 13 Ring 14 Ring 15

# *

# * # * # # * * ## ### # $# ## **# *# * *# * * ** * # ** * * * * # ## * ** # * ## ## ** ** ## # # # * * # * # # # * # # ** * # * # # # * * * ### * * * *** * # * # ## # # *# # ** *## Beach--Santa Ana * * # * Los Angeles--Long # * * # # * Riverside--San Bernardino # * # * *# # # #* ## ** # #* * # # # # # * * ## ** # * * * #* * # * * * # * ## # * * # * Hemet * Indio--Cathedral City--Palm Springs # * # * # ## # * ** * # * # * Temecula--Murrieta Mission # Viejo # * *# #* * # * # *

0

10

20

40

60

80 Miles

San Diego

Los Angeles, CA
This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

CFN Services

6

…enables broad-based 4G coverage and lower lifecycle costs
CFN Services FiberSource® Deployment Planning Platform
! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! !

! ! ! !

Lancaster--Palmdale
! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

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!

! !

Simi Valley Camarillo * Thousand Oaks # Oxnard

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Victorville--Hesperia--Apple Valley

# *
! !

Santa Clarita

# *

# * # * # * #* * # ### # $# #*# * * *# * ## ** # ** * * ## ** # * ## ## ** ** ## # # # ** * * * ## ** # * #* # *# * * * # * # # # * * * ### * * * ** * # * # ## # # *# # *#*## * * # * Los Angeles--Long Beach--Santa Ana # # # * * * Riverside--San Bernardino # * # * # # #* * * *# ## ** # # * * ## ## ** # * * * #* * * * *# # # # # ## # #* ** * Hemet * Indio--Cathedral City--Palm Springs # * # # * # #* # * * * # * # * Temecula--Murrieta Mission # Viejo # * * #* *# # * # *
! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

! !

Legend
!

Cell Sites MSC Hubs MW Backhaul Range (12mi)

$

# *

0

10

20

40

60

80 Miles

San Diego

Los Angeles, CA
This document is proprietary and is intended solely for the use and information of the client to whom it is addressed.

CFN Services

7

4G World Conference Mobile Backhaul Summit Panel Discussion
Mike Dodson Utopian Wireless September 15th, 2009

Substantial 2.5 GHz Spectrum Portfolio

• License areas reach over 7.4 million people in 22 states. • Focused on bringing WiMax mobile broadband services to rural, remote, and suburban markets. 9

Utopian’s Approach to Market Planning
WiMax as the Technology Choice


True mobile internet, available TODAY with the momentum and developing ecosystem necessary to deliver high value products and solutions for our customers. Native Ethernet is the desired backhaul choice.

RAN and Backhaul Considerations



  

Must achieve owner’s economics to make business cases work.
Wireless backhaul, ring vs. hub architectures. RAN designed to deliver targeted services and data rates over the designated footprint. Sites selected not just on best RAN coverage, but also to satisfy backhaul needs.

IP Core Considerations

 

Central vs distributed traffic aggregation, internet handoff.
Quality of Service tradeoffs. Security, harmful content management considerations. No time or funds available to “re-invent the wheel”. Partners who can scale as required to achieve rural, remote, and suburban market business objectives are critical to success.

Vendor & Services Partners
 

10

Utopian’s Broadband Landscape
Suburban Markets
    

Roughly 80k pops and greater, higher population density supports a more efficient network Significant spectrum depth Competitive fixed and wireless incumbent providers Attractive demographics, strong demand for wireless broadband services Highly mobile usage Limited or no broadband service (fixed or wireless) Sparse population Social and economic need for broadband services Fixed and nomadic usage over mobility Time to market Minimize capital and operating expenses Bandwidth is the commodity

Rural & Remote Markets
   

Challenges in both cases
  

11

Backhaul Challenges
Wireless Backhaul
   

Delivers scalable bandwidth with owner’s economics. Many options in terms of vendors, path length, capacity, licensed vs unlicensed, etc. Licensing, site entitlements add time and cost to the deployment. Good RAN sites won’t all be good microwave sites; microwave backhaul will drive higher candidate site fallout as compared to traditional wired backhaul. T-1s are commonly available from the LEC, even in underserved areas. CLEC and Cable MSO native ethernet services may be great for on-net sites.

Traditional Leased Services
 




Special construction adds time, cost, and overall risk to the deployment.
Bandwidth for leased TDM or “Lit Fiber” services are “pay by the drink”; as bandwidth needs increase, so do operating costs. Great for on net sites and establishing fixed cost for nearly unlimited bandwidth.

Dark Fiber




Limited availability, higher cost, and rural market bandwidth long term needs likely rules out “dark fiber to the site” as a viable backhaul solution.

12

Solutions & How to Get There
Source the Fiber First
 

Successful deployment requires a pool of on-net locations suitable for microwave hubs. Dark fiber always the preference, provided the market (or groups of markets) can make the economics work.



Lit services or even TDM hubs can be viable, so long as the economics support the business case and time to market advantage offsets higher operating costs.
Hybrid centralized / distributed architecture Nodes selected based on access to fiber providers and the internet Hub and spoke vs ring architecture choice depends on the market.
 

IP Core Design Approach
 

In-Market Microwave Backhaul


Hub & spoke OK for smaller markets where the number of “spokes” are few. For larger markets, ring offers many more choices for fiber aggregation points, more tolerant of site candidate fallout, and higher reliability.

13

CFN as a Key Services Partner
Rural Broadband Stimulus Funding Opportunity


Federal Government’s Broadband Stimulus Funding Program administered by RUS and NTIA aims to deliver broadband services to unserved and underserved areas across the US.
Utopian Wireless developed a proprietary methodology for determining underserved areas in its licensed Geographic Service Areas (GSAs). Utopian engaged it’s infrastructure vendor partner to collaborate in the development of RAN and Backhaul designs for each area as key elements of the application process. Applications require project-specific details for complete end to end designs which demonstrate connectivity from the end user to the internet backbone. CFN supported Utopian’s efforts via it’s in-house expertise and tools including FiberSource. From a list of over 140 target service areas, CFN was able to rapidly identify for each area the fiber providers, on-net locations, mileage and cost. This data enabled Utopian to develop preliminary end to end designs for each of the area and produce very high quality funding applications fully compliant with the criteria set out by the agencies.

  

The Challenge: Integrate Underserved Area Designs with the IP Core
  

14

4G World
Backhaul Summit

Doug Smith
Chief Information Officer

Company Highlights
2nd Largest WiMAX Operator in the US Focus on smaller, more rural markets in the US Differentiated Product Offering

Deep Spectrum Position Averaging 114 MHz Across Footprint Repeatable, Scalable Market Model Highly Capital Efficient Deployment Model National Partnership with Rural Telcos and Electric Cooperatives

16

DBC Service Delivery Chain

Small Business

MDUs Visitor-based network NOC Single Family Homes Schools

Fiber or Wireless Internet Backhaul

Military Housing

First Mile
Flexible, low-cost back office
• Outsource/integrate: ‐Arise (customer care) ‐Aria (billing) ‐TNI (order mgmt) • Outsource overhead • Scalable – invest as you grow

Middle Mile
Low-cost, high-capacity backhaul
• Regional fiber capacity • Municipally-supported transport networks • Utility-owned fiber networks • • • •

Last Mile
New WiMAX technology to reach end customer
Underserved/exclusive markets Self-provisioned, fast install Portable  personal broadband No one between DBC and its customers

17

Backhaul Best Practices
• DigitalBridge employs an array of backhaul solutions:
- Fiber and microwave are most often deployed.

• Cost-efficiency is a primary driver in the selection process. • Reliability determines the ultimate network solution.

18

Unique Challenges of Backhaul
• Operators have to think differently about backhaul solutions in context of 4G broadband delivery. • Rural markets present unique challenges and backhaul requirements:
– High-capacity circuit backhaul solutions needed for 4G broadband delivery are not always present.

19

The Future of Backhaul
Backhaul technology is evolving…
– Wireless point-to-point solutions are improving. – Fiber solutions continue to be enhanced. – Other creative in-band solutions are being developed.

20

LEAP Wireless Dan Graf
4G World Mobile Backhaul Summit Dan Graf

Leap Wireless

Company Background
• Leap Wireless provides innovative, high-value wireless services to a fast-growing, young and ethnically diverse customer base through its subsidiary, Cricket Communications, Inc. • Leap is primarily the company’s financial brand, used mostly with investment and industry audiences, not consumers.

• Leap is traded on the NASDAQ Global Select Market under the ticker symbol “LEAP”.
• Leap is headquartered in San Diego, Calif. • For more information, please visit www.leapwireless.com.

22 Confidential/Proprietary

Cricket Communications, Inc.
• Cricket Communications, Inc. is the operating subsidiary of Leap Wireless. • Cricket is a simple, affordable, flat-rate wireless service offering unlimited usage with no long-term commitments or credit checks. • Cricket offers customers access to a variety of the latest handsets and feature-rich mobile applications such as popular games, ringtones, ringback tones and wallpapers. • Cricket’s phone service is available on a monthly pay-in-advance basis or daily with Cricket PAYGo, a traditional prepaid service for consumers who want unlimited services on a more flexible payment schedule.

23 Confidential/Proprietary

Cricket Communications, Inc.
• Cricket also offers an unlimited wireless internet service, Cricket Broadband. • Cricket is designed to make wireless communications simple, affordable and worry-free. Predictability, simplicity and value are the foundations of our business.

• Cricket owns and operates its own high-quality, all-digital CDMA2000 1X and 1xEV-DO network that regularly ranks 1st or 2nd in overall market quality from independent tests.
• The company and its joint ventures now operate in 30 states and hold licenses for 35 of the top 50 U.S. markets.

24 Confidential/Proprietary

Current Challenges in Planning for 4G
• 4G will require bandwidth that current TDM networks cannot provide economically. • How do we cost effectively build and maintain 3G and 4G networks simultaneously. • How do we provide seamless transition between 3G and 4G networks. • Competition for last mile backhaul including alternative providers and technologies.

• Some alternate technologies are new and may not be ready for prime time.
25 Confidential/Proprietary

Best Practices in Planning for 4G
• Trials – Feasibility testing of Ethernet and other technologies – Integration of equipment with new technologies – Training and knowledge base • Partnering with vendors on solutions and trials.

• Backhaul RFQ – What’s available and where available.
• Create a by market Playbook that includes a set of solutions.

• Plan solutions based on what’s available and geographical topologies.

26 Confidential/Proprietary

Future Challenges
• How to manage current networks while migrating to 4G networks. • Thinking IP and cost per bit. • Maintain quality while reducing costs per MB. • Reduce legacy TDM networks with least impact to customers. • Overall challenge of migration to an all IP network.

27 Confidential/Proprietary


				
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