synthesiser frequency hopping

8/12/2019 Synthesiser Frequency Hopping

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Motorola Confidential ProprietarySFH For Coverage 1

GSM Products Division

Synthesiser Frequency Hopping

For

Coverage

Product Management

GPD

Motorola ECIG


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Outline

Introduction to coverage enhancement

Introduction to SFH

SFH and coverage enhancement

Motorola leadership position

Summary


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Cell radius

Designed

Coverage

Introduction To Coverage Enhancement

Areas with inadequate qualityCoverage availability

Quality Driven

Coverage area

Coverage Driven

Coverage Enhancement


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Introduction To Coverage Enhancement

Fading

Interference

Irregular terrain

Irregular sites

Coverage

availability

Tx power

Rx sensitivity

Link balance

Signal quality

Coverage

area


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Introduction To Frequency Hopping

Synthesiser Frequency Hopping - SFH

Radios frequency can be tuned in real-time

A radio can hop over a broad spectrum

Performance is not restricted by the number of radios

Base Band Hopping - BBH

Radios frequency is fixed

The number of radios/cell must equal to the number offrequencies/cell

Performance is restricted by the number of radios

Motorola supports both SFH and BBH


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Key advantages of SFH

Not restricted by the number of radios

Allows a wide spectrum to hop

Allows the best hopping performance to be realised

High equipment utilisation

The required number of radios depends on the real traffic demand

(Under BBH, the required number of radios must equal to the number hopping frequencies, which ismore than required by the real traffic. So low equipment utilisation)


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Fading

Causes quality

deterioration Is frequency dependent

FH diversifies theimpact of fading and

improves qualityValue of FH - coverage

availability

Fading


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Interference

A result of frequency

reuse & irregular terrainand sites

FH diversifies the impactof interference and

improves qualityValue of FH - coverage

availability

Interference


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SFH And Coverage Enhancement

Low coverage availability areas

A typical conventional network


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SFH And Coverage Enhancement

A typical SFH network

Coverage Enhancement

H igh Coverage Availabi l i ty(no increase in coverage area)

High equipmentutilisation

High customer

satisfaction

Increased revenue

Typical RF loss

less than 1%


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SFH And Network PlanningAllocate all frequencies to (except BCCH frequencies)

Every site - 1x3 or

Every cell - 1x1Equip number of carrier units per site based on real

traffic demand

Enable non-BCCH carrier to hop over allocated

frequencies

Increase number of carrier units when traffic increases- NO NEW SITES NEEDED!


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SFH And Network Growth

High coverage

efficiency

High capacity

Network Evolution

Number ofradio per cell

Networkgrowth at

minimum costsSimple RF

planning

No new sites

requiredEasier system

integration


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Motorola Leadership In SFH

Infrastructure

Vendors

Scale Feature available on all

generation BTS

Yes

No

No

Not advertised

Not advertised

World-wide

Not advertised

Not advertised

Small

None

Experience

Highest

Low

Low

Minimal

None

Motorola

Ericsson

Nokia

Nortel

Alcatel


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Why Motorola ?

Motorola is a true believer on SFH

Motorola believes

SFH is superior to BBH

SFH based capacity solution is superior to other capacity solutions

Motorola BTS is capable of SFH from DAY ONE

SFH focused research started as early as 1992

Proactively promote SFH Over 3000 sites worldwide in SFH operation

Used for improving capacity, quality and coverage


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Why Motorola ?

No one has more experience than Motorola in SFH

Motorola has deployed more SFH sites than any other

infrastructure vendor Motorola has gained more SFH deployment experience

than any other infrastructure vendor

Knowledge and experience on SFH are widely spread overMotorola field/system engineering communityWORLDWIDE


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Why Motorola ?Continuing enhancement

Frequency hopping based software features

MAIO control Now

Frequency redefinition Now/GSR4

Prioritising carriers GSR4

Specific SDCCH placement GSR4

Different RxQual thresholds for

hopping/non-hopping carriers GSR4

Network simulation tool with SFH Now


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Summary SFH is a coverage as well as a capacity solution

SFH improves coverage performance

SFH allows network growth at best cost

Motorola has substantial experience in deployingSFH

For capacity, quality or coverage purpose

In a large (national wide) or a small (regional) network

synthesiser frequency hopping

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