Overview

UMTS (Universal Mobile Telecommunication System)the third generation mobile communication systems

WCDMA (Wideband Code Division Multiple Access)the main third generation air interface in the worlddeployment has been started in Europe and Asia, including Japan and Korea, in the same frequency band, around 2 GHzWCDMA was deployed also in the USA in the US frequency bands

Chapter 1Introduction3G air interfacesspectrum allocationtime schedulemain differences from 2G air interfacesChapter 2UMTS Services and Applicationsexample UMTS applicationsconcept phonesQuality of Service (QoS) classes

Chapter 3Introduction to WCDMAprinciples of the WCDMA air interface, including spreadingRake receiverpower controlhandovers

Rake receivera radio receiver designed to counter the effects of multipath fadinguses several "sub-receivers" each delayed slightly in order to tune in to the individual multipath componentseach component is decoded independently, but at a later stage combined in order to make the most use of the different transmission characteristics of each transmission path

the digital section of a CDMA receiver which permits the phone (or cell) to separate out the relevant signal from all the other signalsis capable of receiving multiple signal sources and adding them together using multiple fingersRake receivers are common in a wide variety of radio devices including mobile phones and wireless LAN equipment

Digitized input samplesreceived from RF (Radio Frequency) front-end circuitry in the form of I and Q branches Code generators and correlatorperform the despreading and integration to user data symbolsChannel estimator and phase rotatorchannel estimator uses the pilot symbols for estimating the channel state which will then be removed by the phase rotator from the received symbols

Delay equliserthe delay is compensated for the difference in the arrival times of the symbols in each fingerRake combinersums the channel compensated symbols, thereby providing multipath diversity against fading

Matched filterused for determining and updating the current multipath delay profile of the channelthis measured and possibly averaged multipath delay profile is then used to assign the Rake fingers to the largest peaks

Chapter 4Background and Standardization of WCDMAbackground to WCDMAglobal harmonization process and standardization

Chapters 57 give a detailed presentation of the WCDMA standardChapter 5Radio Access Network Architecturethe architecture of the radio access network (RAN)the interfaces within the radio access network (RAN) between base stations and radio network controllers (RNC)the interface between radio access network (RAN) and core network (CN)

Chapter 6Physical Layerthe physical layer (Layer 1), including spreadingmodulationuser data and signaling transmissionthe main physical layer procedures of power control

pagingtransmission diversity and handover measurements

Chapter 7Radio Interface Protocolsthe radio interface protocolsconsisting of the data link layer (Layer 2) and the network layer (Layer 3)

Chapters 812 cover the utilization of the standard and its performanceChapter 8Radio Network Planningthe guidelines for radio network dimensioninggives an example of detailed capacity and coverage planningcovers GSM co-planning

WCDMA radio network dimensioninga process through which possible configurations and the amount of network equipment are estimated, based on the operators requirements

Dimensioning activities includeradio link budgetcoverage analysiscapacity estimation

estimations on the amount of sitesbase station hardwareradio network controllers (RNC)equipment at different interfacescore network elements (i.e. Circuit Switched Domain and Packet Switched Domain Core Networks)

Chapter 9Radio Resource Managementthe radio resource management algorithms that guarantee the efficient utilization of the air interface resources and the quality of servicealgorithmspower controlhandover controladmission controlload control

Chapter 10Packet Schedulingpacket access and the performance of packet protocols of WCDMAChapter 11High-speed Downlink Packet Accessthe significant Release 5 featureHigh-Speed Downlink Packet Access (HSDPA) and its performance

Chapter 12Physical Layer Performancethe coverage and capacity of the WCDMA air interface with bit rates up to 2 MbpsChapter 13UTRA TDD Modesthe time division duplex (TDD) mode of the WCDMA air interface and its differences from the frequency division duplex (FDD) mode

Chapter 14cdma2000in addition to WCDMA, 3G services can also be provided with EDGE or with multicarrier CDMAEDGE is the evolution of GSM for high data rates within the GSM carrier spacingmulticarrier CDMA is the evolution of IS-95 for high data rates using three IS-95 carriers

Carriera carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) to represent the information to be transmittedthis carrier wave is usually of much higher frequency than the baseband modulating signal (the signal which contains the information)

RakeCounter Tune in RF (Radio Frequency )CircuitryPilot symbolHarmonizationDiversityElectromagnetic()Carrier wave (or carrier) Sinusoidal