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Licensed Microwave Networks
What are licensed Microwave Networks?
OFCOM License Guaranteed spectrum Guaranteed payload/ bandwidth
Fixed band Between 6Ghz and 38Ghz
Used by all the UK carriers and operators
OFCOM License
Guaranteed spectrum
Guaranteed payload/ bandwidth
Fixed band
Between 6Ghz and 38Ghz
Used by all the UK carriers and operators
Over 3,000 links licensed annually
Key Facts…and Uses
Uses….
Private Ethernet
Trunk Ethernet
Video Transport
Video Broadcast (HDTV)
Voice (legacy TDM)
Mobile Voice
VoIP
CCTV
Mobile Broadband
Offshore connections
Instrumentation & control
Key Facts…and Uses
Line of Sight
Line of Sight
Use your eyes…. binoculars or telescopes are good
Alternatives are “lamping” or for longer links a radio survey
High Points
High Points
Interface Requirements - Expandable Payload?
Interface Requirements - Expandable Payload?
Ethernet Connectivity
Electrical
Optical
Multiples
Capacity/Payload
Expandability
Software/configuration driven
TDM
E1 – legacy voice circuits
STM 1
STM 4 & 4c
E3
64Kbs
Ethernet Features
QOS
VLAN
LCAS
Packet Size v Payload
Resilience and Availability
Resilience and Availability
Hot Standby – HSB
Duplicate Equipment
Automatic cut over
LCAS
Seamless removal of faulty circuit
Seamless insertion once fixed
QOS prioritisation
Prediction ofLink Performance / Availability
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Link Design
Typical 99.99% to 99,995%
System gain and losses
Environment losses
Equipment Design
Forward Error Correction (Dual is best)
Adaptive Modulation
Alternative Routing
Rapid Spanning Tree in Ethernet
E1s in ring networks
Digital cross connect for multinode sites
What are the risks?
Can we get the licence?
Many licences
Re-usable by location
OFCOM are commercial
They are also helpful
Microwave systems integrators do this daily
Cost
Based on spectrum efficiency
Suitable spectrum versus payload requirements
Systems integrator will advise
Line of Sight
DIY is a good starting point
Longer links/difficult access
Specialist advice – many companies
Alternative Routing
Relay sites
Third party sites
Consider business continuity/ civil contingency
Future Building Work
Basic risk assessment
Historically low risk
Ownership means that you can move it!!
The Weather……
Good designs minimises risk to agreed availability levels
– typically 99.99% to 99.995%
Manufacturers offer
Guarantees of availability
SLAs with commercial terms to back it up
Resilience and reliability options to augment this
Hot standby
Alternative routing
Adaptive Modulation
Planning Permission…
Usually antenna size dependant
Link design will alleviate this
Knowledge of LPA process and local factors (National Park)
Listed building issues
Technology works behind windows…
Camouflage and shielding techniques available
All technologies require some civil engineering to gain access
Handled by integrator and supplier Extract from the Lake District National Park Planning Portal
“I think there is a world market for about five computers” Thomas John Watson President of IBM 1943
“There is no reason for any individual to have a computer in his home” Ken Olsen President of Digital Equipment 1977
“If the automobile had followed the same development cycle as the computer, a Rolls-Royce would today cost $100, get a million miles per gallon, and explode once a year, killing everyone inside” Robert X. Cringely, InfoWorld magazine
Capacity…
Historical Increases…..
In the early 1990s
Typical Links delivered 4 x 2Mb/s with E1 TDM presentation
High Capacity Links 150Mb/s TDM presentation
In 2008…
Typical Links delivered 40Mb/s with Ethernet and E1 presentation
Private WAN links typically 300-600Mb/s Ethernet presentation
High Capacity Links 1.2-1.5Gb/s Ethernet presentation
Future
Capacity
…
In 2009 + Eth
ernet p
resentatio
n of
2.5Gb/s
Technology…
Historical Issues…..
In the early 1990s
Fixed interfaces and capacities with large rack footprint
“fork lift” upgrades required for additional functionality and payload
Spares required for every variant of the product
In 2008…
Flexible “plug and play” interfaces and software configurable capacities. IFU typically 1U
Upgrades done remotely by licence key and configuration management
Common spares leading low cost of ownership/spares/OPEX
2009 +
Equipment footp
rint o
f less th
an 1 U,
power consumptio
n of below 33W
Link Design…
Historical Design…..
In the early 1990s
Relatively low availability expectations based on the equipment performance
Modulation techniques allowed only relatively low capacity payloads
In 2008…
Availability expectations typically 99.99 to 99.995%
Higher order modulation techniques offering greater bandwidth2009 +
High capacity lin
ks with
manufactu
rer
guarantees of a
vailabilit
y and
perform
ance
Adaptive m
odulation te
chniques
offerin
g more
resilie
nce at the edge
Get the Ingredients right
Get the Ingredients rightPrepare well
Get the Ingredients rightPrepare well
and follow the recipe
Get the Ingredients rightPrepare well
and follow the recipe
You can have your cake and eat it!
See us at Stand 1817 and get your slice of the Cake!
Nera continuously strives to Bridge Societies
Nera enables people to interact with each other through providing stabile, flexible, secure, world-class
wireless communication linksbetween businesses and societies.