4 - nsn - wcdma_refarming_site_solution_africacom2008 - 081120.pdf

8/17/2019 4 - NSN - WCDMA_Refarming_Site_Solution_AfricaCom2008 - 081120.pdf

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Deploying UMTS900

Re-use of existing GSM900infrastructure

AfricaCom 2008

1 © Nokia Siemens Networks WCDMA Refarming Site Solution / SSM RA MEA / November 2008

Customer confidential

ovem er


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Synopsis

• euse o ex s ng n ras ruc ure – Reduce the impact on CAPEX and OPEX by site sharing and

maximum reuse of hardware

▪ Eliminate site acquisition and rental costs

▪ Eliminate site civil work including masts and site infrastructure

– Co-locate GSM and UMTS sites as far as possible (re-use cabinets,power, ac -up sys ems, an enna nes an ransm ss on

– Re-use Network Management

▪ Reduce operational complexity

• Leads to speed of deployment of the network




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Content

• Base Station Site System

• Cabinets

• Antenna Lines• Other considerations

• Network Management (OSS)

• Summary




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GSM 2+2+2 GSM 2+2+2

2G BTS site evolution to WCDMA 900 MHz

Inside GSM

BTS cabinet

Inside

Service

GSM 4+4+4 GSM 4+4+4WCDMA 900 2+2+2

cabinet

GSM 4+4+4 GSM 4+4+4WCDMA 900 2+2+2

Next to GSM

BTS cabinet

LEGEND

Outdoor,

Feederless

RF

GSM 4+4+4 GSM 4+4+4WCDMA 900 2+2+2



Battery string


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Solutions for Antenna System Sharing

Separate antennas forGSM 900 and for WCDMAShared900 or single antenna with

2 broad band elements

inside same radome

GSM 900Mast Head

GSM 900 Antenna

WCDMA900 Mast

900

Antenna

Shared

Antennafor GSM

900 andWCDMA

900

ua or

900 MHz,

exRF module

Amplifiers

Feeders

Head Amplifiers

Feeders

as ea Amplifiers

Sharedfeeders

AISG Compliant

Separate outputfor antenna tilt

signals

Optical fiber and DCcable

Flexi MultiradioCombiner

Flexi WCDMASystem module

BTS Flexi

WCDMA 900BTS

Flexi WCDMA 900RF modules



exSystem module


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Shared Antenna System for GSM 900 and WCDMA900 by Flexi Multi Radio Combiner

GSM 900 GSM 900 & WCDMA 900

Shared

Shared antenna systems inWCDMA refarming

GSM 900Mast Head

GSM 900 Antenna

Shared

for GSM

900 andWCDMA900

900 MHz, • Co-sited GSM 900 and WCDMA900 base stations can utilize thesame antenna system

• Flexi Multiradio Combiner (MRC) Amplifiers

Feeders

Amplifiers

Sharedfeeders

AISG Compliant

Separate outputfor antenna tilt

signals

ou es s are an enna sys emperformance compared to typicalcombiners for antenna sharing

• MRC used together with Dual

Flexi MultiradioCombiner

for sharing losses

Benefits of sharing antennas:

• Faster site construction andWCDMA 900 rollout: existin GSM

BTS

Flexi WCDMA 900RF modules

Flexi WCDMA

900 antenna system can remainuntouched

• Savings in antenna system: sameantenna lines for GSM / WCDMA



• Visual impact: less antenna cablesand antennas


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Shared Antenna System for WCDMA and GSM

Flexi Multiradio Combiner GSM 900 & GSM 1800 & WCDMA 900 & WCDMA 2100

Shared X-pol antenna for GSM900 and WCDMA 900 (If

Shared X-pol

tilt then 2 pieces of V-polantennas are needed

Shared MHAs

Diplexer antenna for

GSM 1800 and

WCDMA 2100with broad bandelement inside

• Combining loss for WCDMA2100 and GSM 1800 < 0.6 dB

• Combining loss for WCDMA

Triplexer

– UL compensated byMHA

– DL < 1dB

Flexi

av ngs n an enna nes anconstruction

• 6 feeder lines instead of 24

• 6 antennas instead of 12

WCDMA2100 BTS

GSM1800 BTS

GSM900 BTS

WCDMA900 BTS

MultiradioCombiner Simpl ified antenna system

means lighter construct ion andlower installation cost

Improved visual impact means



easier si te acquis ition


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Other considerations

• Maximise re-use of existing GSM sites

– Optimally carry traffic from site to core network

•

– ATM aggregation over E1 leased lines (“One Pipe”)• IP/Ethernet-based transport as an alternative

-

• If needed, additional rectifier capacity should be added

• Could result in additional batteries if backup time is to be maintained




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Content


• Cabinets



• Summary




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Versatile OSS functionality for efficient WCDMA

refarmingCentralized OSS for WCDMA refarming

• One system for monitoring, measuring and configuring

the network and services• Seamless management of multi-technology networks

technology requirements

•Management provided with simplified roll-out utilizingNetAct tools

– Provides roll-out support for GSM spectrum efficiencyfeatures, over the whole network or only in part bymanaging licenses and configuration management

• networks utilizing NetAct tools – Optimizes frequencies of existing GSM network to enable

successful WCDMA deployment



– requirements


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Content


• Cabinets



• Summary




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Summary

so u on ver e rom e es s

• GSM900 network planning grid can be used

•

• HSDPA data rate is increased significantly at cell edge

With Nokia Siemens Networks WCDMA900 solution

• 4.2 MHz spectrum allocation for WCDMA is enough• Inter-system and inter-frequency service continuity provided

• Antenna line can be shared between GSM and WCDMA

• e c p m zer s a power u oo or mprov ng e ra onetwork performance




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Thank you

revor a sSolution Manager Nokia Siemens Networks



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