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Ethernet Backhaul for 4G: Successes and Challenges. Presented by Dave Jones SVP Network Services, FiberTower. Outline. FiberTower Overview 4G Backhaul Requirements Bandwidth Requirements by Cell Type Case Study: Fiber vs. Microwave Successes to Date Challenges to Be Met.

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Presentation Transcript
slide1

Ethernet Backhaul for 4G: Successes and Challenges

Presented by Dave Jones

SVP Network Services, FiberTower

outline
Outline
  • FiberTower Overview
  • 4G Backhaul Requirements
  • Bandwidth Requirements by Cell Type
  • Case Study: Fiber vs. Microwave
  • Successes to Date
  • Challenges to Be Met
fibertower overview
FiberTower Overview

FiberTower, a leading backhaul services provider, increasing the overall quality of wireless networks

  • Facilities based hybrid fiber/microwave backhaul provider delivering the critical link between wireless consumer access and the core network
  • Long track record: Delivering service quality & operational efficiencies with backhaul & premise access solutions since 2003
  • Operating networks in 13 major marketswith extensive, nationwide spectrumfootprint in the 24 GHz & 39 GHz bands
  • Utilizing unique and optimal mix of fixed wireless and fiber technologies to provide highly scalable, cost effective solutions for advanced wireless networks

Products & Services

  • SONET: nxT1, DS-3, OC-n
  • Ethernet: 5mb to 1Gig
  • Wavelengths: Inter & Intra Metro
  • TDM to Ethernet Migration
  • Carrier Class, Highly Scalable

A 2010 fastest growing technology company in North America -

#118 on the Deloitte 2010 Technology Fast 500

4g backhaul requirements
4G Backhaul Requirements
  • Carriers require long-term backhaul solutions that can scale with their business needs
  • Timeframe for implementation is now
  • Challenge – achieving the “Three C’s”
    • Coverage
    • Cost
    • Capacity

Carrier-Grade Ethernet transport is not a commodity!

bandwidth requirements by cell type
Bandwidth Requirements by Cell Type

Site Type Radius 4G BandwidthBackhaul Technology

macro 2-10 miles 50-300 Mbps Fiber or microwave

(carrier class)

micro 0.2-2 miles 50-300 Mbps Fiber or microwave

(carrier class)

pico300-1000 feet20-50 Mbps Fiber or microwave

(carrier class)

femto<300 feet5-10 Mbps Cable or xDSL

(user provided,

best-effort)

Outdoor

Coverage

Operator-deployed

User-deployed

Deployment of picocells and femtocells will explode as 4G networks are rolled-out in order to provide the required in-building coverage and capacity, and will present new backhaul challenges.

Indoor

Coverage

case study fiber vs microwave
Case Study: Fiber vs. Microwave

Objective: To evaluate the impact of a hybrid fiber-microwave network architecture in a Tier 1 market using real-world data

Input Data and Assumptions:

  • Major wireless carrier site list
  • Major, high-density fiber network
  • Licensed microwave radio equipment (11-24 GHz)

Evaluate % of sites reachable by:

  • Lateral build from fiber backbone (0.5 and 1 mile range)
  • 1st hop microwave from fiber-fed sites (5 mile radius)
  • 2nd hop microwave from fiber-fed sites (5 mile radius)
case study conclusions
Case Study: Conclusions
  • Depending on the fiber lateral distance that can be economically justified, 39 to 60% of sites can be served by fiber (ideal case)
  • By leveraging microwave radios to create a hybrid architecture, ~95% of sites can be reached
  • In Tier 2 / Tier 3 markets, where sites are more widely distributed and fiber routes are less dense, the % of sites economically reachable with fiber is much lower and the relative impact of microwave will be greater
hybrid fiber microwave architecture
Hybrid Fiber-Microwave Architecture

Legend

MSC = Mobile Switching Center

FEP = Fiber Exchange Point

RF = Radio Frequency

successes to date
Successes to Date
  • Ethernet backhaul deployment is progressing rapidly in Tier 1 markets for most major carriers
  • Demand for backhaul capacity (Mbps per cell site) is accelerating
  • New backhaul providers - cable MSOs and alternative access providers – are playing significant role
  • Most wireless base stations are now Ethernet backhaul-ready
challenges to be met
Challenges to Be Met
  • Many sites in Tier 1 markets are proving difficult to reach with fiber
  • Tier 2 and Tier 3 markets will be more challenging due to dearth of fiber options and lower cell site densities, especially in rural areas
  • Most carriers have unique technical requirements, which continue to evolve based on results of initial deployments
  • Bandwidth requirements and user data traffic characteristics need to be better understood in order to optimize backhaul network performance and economics
  • Picocell backhaul will require new, low-cost approaches to address deployment and line-of-sight challenges