overview of 60 ghz radio technology presented before the fixed link consultative committee...
TRANSCRIPT
Overview of 60 GHz Radio Technology Overview of 60 GHz Radio Technology
presented before
The Fixed Link Consultative Committee Radiocommunications Agency
presented by
Terabeam Corporation
September 17, 2002
Why 60GHz?Why 60GHz?Why 60GHz?Why 60GHz?
• FCC Part 15.255 unlicensed spectrum• Available Spectrum: 57-64GHz = 7GHz contiguous• Less susceptible to fog than FSO• Interference-free due to high oxygen absorption and
narrow beam width• Compact size• Ideal for dense deployment, redundant architectures• Low transmit power limits exposure concerns• High security• Latency-free
Why 60GHz?Why 60GHz?Oxygen AbsorptionOxygen AbsorptionWhy 60GHz?Why 60GHz?
Oxygen AbsorptionOxygen Absorption
Why 60GHz?Why 60GHz?Narrow Beam TransmissionNarrow Beam Transmission
Why 60GHz?Why 60GHz?Narrow Beam TransmissionNarrow Beam Transmission
Areas of potential in-band interference
Why 60GHz?Why 60GHz?Compact AntennaCompact Antenna SizeSize
Why 60GHz?Why 60GHz?Compact AntennaCompact Antenna SizeSize
Antenna of equal performance
Attenna size for a MMW terminal with
44-dBi gain at a 0.9° beam is ten times smaller than that
required for a 6 GHz microwave antenna
with similar capability
Millimeter Wave DefinedMillimeter Wave Defined
Customer network device
11 Optical signal is received from network
MMW is a line-of-sight system that sends data over low-powered radio waves through the air.
4 Optical signal sent back into network via fiber
3 Antenna receives the signal and a radio interprets and converts signal to optical
Customer network device
2 Signal is converted to millimeter wave, modulated and transmitted at ~ 60 GHz
CUSTOMER DATA
5 Signals transmitted back using the same equipment (full duplex)
Terabeam Gigalink™ BasicsTerabeam Gigalink™ Basics
• Fast Ethernet (100 Mbps), OC-3/STM-1 (155 Mbps), OC-12/STM-4 (622 Mbps) speeds
• Point-to-point radio system
• Requires unobstructed line-of-sight
• Reliable for ranges up to 1.25 km
• Faded by heavy rain
• Integral patch or 13” parabolic antenna for extended range
• Turnkey system, delivered complete
• Simple, one man installation
• Mature product design
• Full duplex operation, zero latency
Gigalink Design CriteriaGigalink Design CriteriaGigalink Design CriteriaGigalink Design Criteria
• Physical layer device (no switch or IP on data payload)
• Integrated terminal/antenna, no IDU
• Direct fiber interface for data payload and SNMP
• Direct Digital Modulation (DDM)
− No Forward Error Correction (“FEC”) required− No protocol overhead (no bandwidth waste, latency)− Protocol independent
• Plug-and-play simplicity through Gigamon™ alignment utility
• Fiber input/output for data and SNMP
• Accurate link availability based on statistical data pool
• Simple design for manufacturability, reliability and low cost
Terabeam GigalinkGigalink Model Options
Terabeam GigalinkGigalink Model Options
For short range links For medium range links
• Available in Fast Ethernet, OC-3, and OC-12 Speeds
• Two antenna options for varying link distances
Terabeam GigalinkCost-Effective Outdoor Deployment
Terabeam GigalinkCost-Effective Outdoor Deployment
Flexible mounting options including poles or towers mounts
Modulation/Demodulation A Primary Cost Driver
Modulation/Demodulation A Primary Cost Driver
Projected Cost vs. Modulation
for 100 Mbps/155 Mbps@ 60 GHz
0
1
2
3
4
Modulation TypesR
ela
tiv
e C
ost
s ($
)
• Historically, cost has been the single biggest reason for the lack of MMW Spectrum utilization for commercial uses
• For commercial high data rate (>155 Mbps) MMW radios, modulation/ demodulation is the biggest cost drivers:
– Coherent modulations requires phase-locked oscillators and phase matched components
• -’s: Very high cost, complexity• +’s: High bandwidth utilization
– Non-coherent modulations allow the use of free-running oscillators and phase “stable” (vs. “Matched”) components
• -’s: Less efficient bandwidth utilization
• +’s: Low complexity, lowest cost
SummaryTerabeam’s Affordable & Highly Reliable Gigalink Systems
SummaryTerabeam’s Affordable & Highly Reliable Gigalink Systems
Ultra-High Data Rate Capability
Flexible Deployment
Affordable
Safe and Secure
• Gigabit Ethernet speeds in trial• Up to OC-48 possible in future
• High-capacity systems with reliable link ranges
• Low probability of interference• Designed for dense deployments
• Mature, cost-effective system design• Simple, one-person installation• Protocol independent• Patented Direct Digital Modulation
• Low amounts of energy emission• Field-proven product line• Remote management via SNMP data
Terabeam Gigalink Ranges by Region
North America
Terabeam Gigalink Ranges by Region
North America
based on 10-9 BER
The ranges listed are generalized for a specific rain region and availability. Actual results may vary.
Terabeam Gigalink Ranges by Region
Europe
Terabeam Gigalink Ranges by Region
Europe
based on 10-9 BER
The ranges listed are generalized for a specific rain region and availability. Actual results may vary.
Gigalink Family of RadiosGigalink Family of RadiosGigalink Family of RadiosGigalink Family of Radios
Gigamon™ Monitoring Screen
DeploymentDeployment History HistoryDeploymentDeployment History History
• 1995 Tokyo OC3 Beta Site, (7) OC3 Links
• 1999 EMC Campus (4)OC3 (6) OC12 Links
• Oct. 2000 Harmonix obtains FCC part 15 Cert.
• 2000 E-xpedient Miami, (20) 100FX Links
• 2001 Debut of Wireless Production video link
• 2002 FSO Hybrid Links (Cogent, Sprint)
• 2002 will deploy world’s first “GigE” RF Link
Case Study: Terabeam MMW & e-xpedientCase Study: Terabeam MMW & e-xpedient
• E-xpedient needed to build metro area network in Miami, FL in a dense configuration and rapid timeframe.
• Used Terabeam MMW systems to build the MAN
– 2 transport rings– 6 – 60 GHz MMW radio
links– 6 – Laser link backups– 2 – 38 GHz radio links
DeploymentDeployment History HistoryDeploymentDeployment History History60 GHz with FSO Backup (Miami Network)
DeploymentDeployment History HistoryDeploymentDeployment History History
OC-12 Production Video Remote Backhaul RadioNational Association of Broadcasters (NAB) Debut