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Broadband Fixed Wireless. 2Ghz to 40Ghz. Spectrum Availability. + Ultra High-Speed LAN/WAN. + TDM Leased Lines. + High Speed Internet and Multimedia. >100 Mbps. 10 to 100 Mbps. Voice, Data, Fax, ISDN. 1 to 50 Mbps. Bandwidth (MHz). 256 Kbps. 100. 300. 400. 1000. 1350. 1400.

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PowerPoint Slideshow about ' Broadband Fixed Wireless' - elan


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Presentation Transcript
spectrum availability

2Ghz to 40Ghz

Spectrum Availability

+ UltraHigh-SpeedLAN/WAN

+ TDMLeased Lines

+ High Speed

Internet and Multimedia

>100 Mbps

10 to 100Mbps

Voice, Data, Fax,

ISDN

1 to 50Mbps

Bandwidth

(MHz)

256 Kbps

100

300

400

1000

1350

1400

2000

5000

20 30

200

200

No LOS

LOS

1 GHz 2.5 3.5 5.8 10 24 26 28 38 40 60

MMDS

UNII

LMDS

Multichannel Multipoint

Distribution Service

Unlicensed National Information Infrastructure

Local Multipoint Distribution Service

spectrum availability worldwide
Spectrum Availability Worldwide

+ UltraHigh-SpeedLAN/WAN

+ TDMLeased Lines

+ High Speed

Internet and Multimedia

>100 Mbps

10 to 100Mbps

Voice, Data, Fax,

ISDN

1 to 50Mbps

256 Kbps

Bandwidth

(MHz)

100

300

400

1000

1350

1400

2000

5000

20 30

200

200

No LOS

LOS

1 GHz 2.5 3.5 5.8 10 24 26 28 38 40 60

slide4
MMDS
  • MMDS - Multichannel Multipoint Distribution Service
  • FCC regulated wireless cable system
  • Delivery of multiple video signals via point-to-multipoint microwave transmissions
  • Comprised of 33 microwave frequencies in 2.5 GHz band
slide5
UNII
  • UNII – Unlicensed National Information Infrastructure
  • Located in 5.2 – 5.8 GHz bands
slide6
LMDS
  • LMDS – Local Multipoint Distribution Service
  • Located in 28 GHz and 31 GHz bands
  • Broadband radio service designed to provide two way transmission of voice, high speed data and video
  • Low powered transmitters broadcast voice, data and video signals in metropolitan areas
spectrum horses for courses
Spectrum: Horses for Courses
  • Less than 6 GHz
    • Long range (up to 30 miles), Non LOS, not affected by weather
    • Low-cost equipment - residential and SOHO CPE
    • Spectrum suitable for mass market deployments
  • Greater 6 GHz
    • LOS, short range (1-3 miles), affected by weather, more spectrum (1Ghz)
    • Spectrum used specifically for urban deployments to Large business or Multi-tenant units
reach distance from hub

2.5 GHz

6 GHz

23 GHz

28 GHz

Reach Distance From Hub

Point-to-Multipoint

Point-to-Point Links

24 GHz

28 GHz

2.5 GHz

38 GHz

50.0

20.0

7.5 5.0

3.57

5.34

6.92

40

Reach Distance**, Km

Reach Distance*, Km

*Assume Rain Zone K, Single Channel per Transmitter, same power, same dB gain antennaes for all frequencies.

**Assume Rain Zone K, 6cm antennae for 99.995% average availability, vertical polarization.

p2p vs p2mp
P2P vs P2MP

P2P

dedicated

bandwidth

P2MP Sector

P2MP

shared bandwidth

cost per subscriber by network

# of Subscribers

Cost per Subscriber by Network

This is the point at

which PMP becomes more

economically viable than

a PTP network, generally ~8 links.

Cost Per Subscriber

PTP

PMP

CPE Cost

unified broadband wireless reference architecture

Industry

Suppliers

Unified Broadband Wireless Reference Architecture

FCC Compliant R.F.

Small Office

Wireless

Service

Modules

SAT

SAT

38 GHZ

Radio

Standard I.F.

PBX

38 GHZ

Radio

38 GHZ

Radio

IP

ATM

WDM

FR

LMDS

Radio

LMDS

Radio

Branch

Office

UNII

Radio

UNII

Radio

MMDS

Radio

MMDS

Radio

SOHO

Telecommuter

10 GHZ

Radio

10 GHZ

Radio

Integrated

Wireless MAC

Other

Other

Any RF band

Consumer

End-to-End Services, Network Management,Provisioning AND Billing

Backhaul

Network

CPE

Networks

key features
Key Features
  • IP Packet Based Solution with DOCSIS 1.1 support
  • Up to 44.4 Mbps full-duplex throughput
  • Up to 25 Miles in connection distance
  • Fiber quality link
      • > 10-11 BER for Data, > 10-8 BER for Voice
  • Supports both MMDS (2.5 GHz) and UNNI (5.7 GHz)
  • Encryption support: 56 bit DES with RSA key management
the problem

The Problem

Line-of-Sight:

The technology, while promising, continues to have nagging "line-of-sight" issues. Wireless signals in these systems must have a clear path to travel as they bounce from rooftop to rooftop. Trees, buildings and even inclement weather, such as snow and pelting rain, can cause static, dropped calls and hazy connections.

Leslie Cauley

staff reporter in The Wall Street Journal\'s New York bureau

September 20, 1999

the solution

Paths

Base Station

Subscriber

The Solution
  • VOFDM (Vector Orthogonal Frequency Division Multiplexing) technology
  • employs both frequency and spatial diversity
  • creates a robust processing technique for multipath fading and narrow band interference
  • VOFDM enables greater coverage
  • substantially reduces LOS limitations
what is vofdm
What is VOFDM?

Transmit Spectrum

  • Each VOFDM burst carries data and training
    • Allows for variation inthe channel
    • Reduces effect of frequency offset
  • VOFDM, interleaving and coding
    • Create a robust processing technique for multipath fading and narrow band interference

Receive Spectrum

Channel Training Tone

Data Tone

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