3-day instructor-led training with case studies

This course will enable participants to:

• Develop their understanding of what UMTS is, its overview and architecture;
• Develop their appreciation of how UMTS and related technologies can be used to deliver value to customers,
• Explore the linkages between technological capabilities of UMTS and the antenna systems sued for the optimum performance for the same

The goal of “UMTS System Engineering” is to present details and up-to-date information on the UMTS standard. The participants will become familiar with the features of the UMTS standard and why and how it evolved. The participants will learn about practical performance and deployment issues specific to the UMTS.

The participants will gain a detailed end-to-end knowledge of the UMTS technology, its benefits and potential pitfalls.

A basic knowledge of GSM/CDMA, IP and data communication technology will be required.

For engineers and managers responsible for planning, design, and operation of UMTS networks and indoor design services.

• First Generation Networks
• Second Generation Networks
• Third Generation Networks – requirements and characteristics
• WCDMA Basics and Comparison with GSM

[3G Systems are intended to provide a global mobility with wide range of services including telephony, paging, messaging, Internet and broadband data. International Telecommunication Union (ITU) started the process of defining the standard for third generation systems, referred to as International Mobile Telecommunications 2000 (IMT-2000). In Europe European Telecommunications Standards Institute (ETSI) was responsible of UMTS standardization process. In 1998 Third Generation Partnership Project (3GPP) was formed to continue the technical specification work. 3GPP has five main UMTS standardization areas: Radio Access Network, Core Network, Terminals, Services and System Aspects and GERAN.]

• UTRAN Architecture
• Network Elements – Node B, RNC, MGW
• Interfaces – Uu, Iu, Iub, Iur
• Multiple Access Technologies – FDMA, TDMA, CDMA
• Bearer – RAB – Radio Access Bearer Types

[A UMTS network consist of three interacting domains; Core Network (CN), UMTS Terrestrial Radio Access Network (UTRAN) and User Equipment (UE). The main function of the core network is to provide switching, routing and transit for user traffic. Core network also contains the databases and network management functions.

The basic Core Network architecture for UMTS is based on GSM network with GPRS. All equipment has to be modified for UMTS operation and services. The UTRAN provides the air interface access method for User Equipment. Base Station is referred as Node-B and control equipment for Node-B's is called Radio Network Controller (RNC). UMTS system page has an example, how UMTS network could be build.]

• Functions of 3G MSC and GMSC
• Functions of SGSN and GGSN
• Mobility Management Signaling processes
• Concept of PDP context and session management

• Spreading principle
• Channelization codes
• Scrambling Codes
• Spread spectrum Gain
• Scrambling Code Planning
  

[TDD WCDMA uses spreading factors 4 - 512 to spread the base band data over ~5MHz band. Spreading factor in dBs indicates the process gain. Spreading factor 128 = 21 dB process gain). Interference margin is calculated from that:

Interference Margin = Process Gain - (Required SNR + System Losses) Required Signal to Noise Ration is typically about 5 dB System losses are defined as losses in receiver path. System losses are typically 4 - 6 dBs]

• Fast Link Adaptation
• Power and capacity calculations
• Power Control
• Open loop
• Outer Loop - RNC
• Inner Loop – RBS
• Control Channels and their Power settings
• Power Ramping on RACH
• Softer, Soft, hard handovers

[Open loop power control is the ability of the UE transmitter to sets its output power to a specific value. It is used for setting initial uplink and downlink transmission powers when a UE is accessing the network.

Inner loop power control (also called fast closed loop power control) in the uplink is the ability of the UE transmitter to adjust its output power in accordance with one or more Transmit Power Control (TPC) commands received in the downlink, in order to keep the received uplink Signal-to-Interference Ratio (SIR) at a given SIR target.

Outer loop power control is used to maintain the quality of communication at the level of bearer service quality requirement, while using as low power as possible.]

• Downlink and Uplink logical channels
• Downlink and Uplink transport Channels
• Downlink and Uplink Physical Channels
• Common Pilot Channel and Sync Channel
• Dedicated Control and Data Channel

[UTRA FDD radio interface has logical channels, which are mapped to transport channels, which are again mapped to physical channels. Logical to Transport channel conversion happens in Medium Access Control (MAC) layer, which is a lower sub layer in Data Link Layer (Layer 2).]