UMTS

Chapter 2: Network Evolution from GSM to UMTS

2.1. Introduction

The choice of the term "UMTS" that means Universal Mobile Telecommunications System was not fortuitous. It was a matter of marking the difference with its 2G predecessors, still considered as mobile telephony systems. The Global System for Mobile communications (GSM) strongly contributed to making mobile phones become an everyday life product. Its first goal that was of providing high-quality voice services was achieved. GPRS and EDGE technologies are part of the second phase named GSM Phase 2+ and they are setting up the basis for providing multimedia services and high-speed access to Internet - services enhanced within UMTS standard. Table 2.1 summarizes the key milestones in the recent history of UMTS.

Table 2.1: Key milestones in UMTS network development

February 1992

WARC-92 allocates 230 MHz spectrum around 2 GHz for IMT-2000 use

1987 1995

RACE I and RACE II projects are carried out in Europe aiming at the technical definition of UMTS

1995 1999

The EU funded ACTS/FRAMES projects striving for the definition of two radio access technologies denoted FMA1 and FMA2 which can be seen as the predecessors of UTRA/TDD and UTRA/FDD, respectively

December 1996

Start of the development of specifications for UMTS under ETS1 SMG2

June 1998

Up to 10 terrestrial radio access technologies are submitted to the ITU-R to be part of IMT-2000

October 1998

ITU-R selects the current IMT-2000 radio interfaces: UTRA/FDD, UTRA/TDD, TD-SCDMA, cdma2000, UWC-136 and DECT. A number 3G satellite components are also identified

December 1998

The first meetings of the...

UNLIMITED FREE
ACCESS
TO THE WORLD'S BEST IDEAS

SUBMIT
Already a GlobalSpec user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your GlobalSpec Experience

Category: Cellular Modem Chips
Finish!
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.