ATM in UMTS3 G T R A N S P O R T T E C H N O L O G Y

ATM in UMTS

Rapid growth of mobile Internet and other mobile services will result in increasing demand for higher data transmissioncapacity. Based on WCDMA, UMTS is one of the evolving 3G mobile communications systems designed to meet this

demand. High bit rates for both circuit- and packet switched services allow several mobile multimedia in the same call,e.g. data, chat, video and voice.

ATM, (Asynchronous Transfer Mode) is a compromise between circuit- and packet switched technologies. ATM is thestandardized transmission technique for assuring QoS and for supporting the variety of services offered by UMTS.

Course description

ATM in UMTS is a 2-day course. The course gives the participant a thorough understanding of how ATM is applied inUMTS. The course describes the ATM adaptation layers and how ATM is adapted to suite different UMTS services.Theory along with simulation examples, explain the differences between AAL2 and AAL5, which are important for theperformance of ATM in UMTS. Exercises illustrate e.g. how the dimensioning of the required ATM link is performed.

3G transport technology

� Where is ATM used?� Are there any alternatives to ATM?� What is meant by an “adaptation layer”?� Why is AAL 2 needed?� What is the meaning of ALCAP?� How can an ATM network be designed?� What will be the future of ATM?

Contents

ATM Architecture• Physical layer• ATM layer• ATM adaptation layer (AAL)• AAL2• AAL5• AAL2/AAL5 comparison

UMTS Architecture• Network nodes• Protocols and interfaces• Where is ATM used?

AAL2/AAL5 simulation examplescomparing• Efficiency• Throughput• Overhead• Capacity• Set-up time• Number of calls supported• Required ATM rate

AAL2 in Iub• Usage and demands in Soft Handover• Why a new AAL layer?

ATM in UMTS• Call SetUp• Call Initiation• Overview of signals and parameters (ex.

NSAP, CID, ALC, SUGR)• Mapping of the RAB parameters to ATM• ALCAP usage

QoS• QoS and ATM parameters• Mapping of QoS and RAB parameters

IP and ATM• Simulation results• Buffer sizes• Data Length/Packet length• Future trends• Changes in new releases• What happens with ATM?

Dimensioning• Node B dimensioning from the ATM point

of view• Calculation and dimension of the required

ATM link• Calculation of the total required bit rate

Network design• Design and structure of an ATM network• Equipment and performance

Who should attend?

ATM in UMTS is valuable to everybody involved in transmission networkplanning of the third generation mobile communication systems.

Prerequisites

The course is advanced and should be regarded as a continuation of theWidermind course ATM Survey. Hence it is recommended that the partici-pants have a basic understanding of transmission network planning.

� For more information about in-house training events, pleasesend an email to Widermind at info@widermind.com. Theschedule for public training events is available at the Widermindweb site, www.widermind.com.

www.widermind.com

Widermind AB

Artillerigatan 6SE-114 51 Stockholm, SwedenPhone: +46 8 459 21 70Fax: +46 8 459 21 71info@widermind.com