1.1_introduction to wcdma umts_for_partners_modified.pdf

8/11/2019 1.1_Introduction to WCDMA UMTS_for_partners_modified.pdf

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1 2006 Nokia Introduction to WCDMA / UMTS / 2006-10-23 / TKo,RBe,FAs

Introduction to WCDMA / UMTS
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After completing this module, the participant should be able to:

List at least three significant events in the evolution of CDMAnetworks

List the four main network subsystems of 3GExplain how existing GSM networks support 3G

Name the four basic air interface access technologies

List at least three key benefits of WCDMA and identify at leastthree advantages of 3G networks for both the operator and the end-user

Objectives
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Requirements of 3G systemsBit rates up t o 2MbpsVariable bit rate to offer bandwidth on demandMultiplexing of different QoS services on a single connectionSupport range of delay requi rements from real-time to best-effort trafficsQuality requirements from 10 % frame error rate to 10 -6 bit error rateCo-existence of 2G and 3G systems and inter-system handovers for coverageenhancements and load balancingSupport of asymmetric uplink and downlink trafficHigh spectrum efficiencyCo-existence of FDD and TDD modes


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Thesubsystems of UMTS

WCDMA

ATM

Iu

NMS NMS

CN CN RA N RA N

O&M

Uu

UE UE

UE = User EquipmentRAN = Radio Acces NetworkCN = Core NetworkNMS = Network Management System

S e r v i c e

P l a t fo rm

S e r v i c e

P l a t fo rm


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3G Access Rate targets

Environment RT Service Peak Rate(Delay f ixed f ixed 20 300 ms)

NRT Service Peak Rate(Delay va r ies va r ies 20 300 ms)

Rural Outdoor (Speed < 250 km/h)

144 384 kb/s 144 384 kb/s

Urban/Suburban(Speed < 150 km/h)

384 512 kb/s 384 512 kb/s

Indoor/Low Range Outdoor (Speed < 10 km/h)

- 2 Mb/s(Special conditions)

- 2 Mb/s(Special conditions)

Pedestrian & Office (


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HW/SW Changes

Network evolution

MSC&VLR

HLR & AC & EIR

PSTNBSC

BSC

BTS

BTS

TCSM

TCSM

ISDN

A GSM network is made from 3 Sub-Systems (BSS, NSS and OSS)

Value Added Service Platform(s):

SMSC, VMS

Even at the start, VAS (value added services) were part of GSM networks

TRX Change & Transmission Upgrade

HW/SW Changes

IN

IN was introduced for new services and differentiation (e.g. Pre-Paid)

IP Networks

Data Rates in GSM are increased by implementation of Features like HSCSD

SGSN

GGSNIP Networks

GPRS is added to existing networks to support Packed DataHigher data rates are obtained by introducing EDGE in the GSM network UMTS Rel'3; new BTS, Radio Network Controller, Media Gateway, 3G-SGSN

RNCBTS

3G-SGSN

MGW

GPRS adds improved data services with a new Packets witched backbone WhereSGSN and GGSN are two main elements


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Features of WCDMA

Efficient use of spectrum Limited frequency management

Low mobile station t ransmit power

Uplink and dow nlink resource uti lisation independent

Wide variety of data rates Improvement of mult i-path resolution RAKE receiver

Statistical mult iplexing advantage Increased standby-tim e from higher rate control channels.


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Key operator benefits

New service capabili ties means newbusiness opportuni ties for operators,(further differentiation)

Revenue opportunity with increaseddata/voice traffic

New frequency spectrum

The path towards IP mobil ity


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Key end-user benefits

Integrated customised services

Simplified service provisioning andservice upgrades

Wireless personal Int ernet

Mult imedia messagingEnhanced e-mail

Telecommuting

Im proved quality of service

Support for video/audio clips

1.1_introduction to wcdma umts_for_partners_modified.pdf

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