W&M 2009 – Licensed Microwave Networks – A Piece of Cake?

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!

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Nera enables people to interact with each other through providing stabile, flexible, secure, world-class

wireless communication linksbetween businesses and societies.