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UMTS Code Division Testbed

Objective

The overall objective of the CODIT project is to explore the potential of code division multiple access (CDMA) for a future high capacity universal mobile telecommunication system (UMTS). An advanced system concept based on CDMA will be established including advanced radio technologies (radio interface, radio transceivers, etc) and advanced sub-system architectures (micro- and pico-cells, macro-diversity, fast and soft handover, frequency management, radio network planning methods, etc).

A system demonstrator (testbed) comprising mobile station, radio base station and a radio network controller will be designed and built in order to validate the CODIT system concept.
The overall objective of the research was to explore the potential of code division multiple access (CDMA) for a future high capacity universal mobile telecommunication system (UMTS). The research utilises and advanced system concept based on CDMA which includes advanced radio technologies (radio interface, radio transceivers, etc) and advanced subsystem architectures (microcells and picocells, macrodiversity, fast and soft handover, frequency management, radio network planning methods, etc).

The system concept is designed to meet the major requirements of a third generation UMTS which are:
handling of picocells, microcells and macrocells with a simple deployment of specturm resources allowing multiple operators as well as private networks;
indoor and outdoor operation with a high grade of service;
support of low power pocket terminals for high quality speech services;
easy access to (known) data networks;
variable bit rate bearer for advanced data services;
the ability to support a large number of users (50% penetration rate).

The system testbed is designed to demonstrate:
radio transmission performance in an interference limited system handover real time speech transmission;
data transmission speech capabilities (lower layers only);
radio protocols as far as required for call setup and handover.
Technical Approach

The CODIT project is divided into three phases:

- An analysis phase: producing a broad outline of the system concept by mid 1992.
- A system design phase: the system is designed and verified via computer simulation, and a testbed build.
- A test and validation phase: the complete testbed is integrated and verified and tests results evaluated. As a result, the specification of the system will be revised at the end of the project.

Key Issues

The CODIT system concept will meet the major requirements of a third generation UMTS which are:

- Handling of pico-, micro- and macro-cells with a simple deployment of spectrum resources allowing multiple operators as well as private networks.
- Indoor and outdoor operation with a high grade of service.
- Support of low power pocket terminals for high quality speech services.
- Easy access to data networks.
- Variable bit rate bearer for advanced data services.
- Ability to support a large number of users (50% penetration rate).

Expected Impact

The CODIT project will help to increase the understanding of CDMA and explore its potential for future mobile and personal telecommunications systems. The results of the project will form a valuable input to standardisation work on future generations of mobile radio communication systems in Europe (ETSI) and the world scene.

Coordinator

ERICSSON RADIO SYSTEMS AB
Address
Thorshamngatan 21-23
164 80 Stockholm
Sweden

Participants (11)

ASCOM TECH AG
Switzerland
Address
Gewerbepark
5506 Maegenwil
British Telecom plc (BT)
United Kingdom
Address
British Telecom Centre 81 Newgate Street
EC1A 7AJ London
Centro Studi e Laboratori Telecomunicazioni SpA (CSELT)
Italy
Address
Via Guglielmo Reiss Romoli 274
10148 Torino
Compagnie IBM France SA
France
Address
La Gaude Laboratory
06610 La Gaude
Deutsche Forschungsanstalt für Luft- und Raumfahrt eV (DLR)
Germany
Address
Münchener Straße 20
82230 Weßling
Italtel Società Italiana Telecomunicazioni SpA
Italy
Address
Ci1a Busr-rs-r
20019 Castelletto Di Settimo Milanese (Mi)
Matra Communication
France
Address
Rue Jean-pierre Timbaud
78392 Bois D'arcy
NORTEL MATRA CELLULAR
France
Address
Rue Jean Pierre Timbaud
78392 Bois D'arcy
Philips Research Laboratories Ltd
United Kingdom
Address
Cross Oak Lane
RH1 5HA Redhill
TELEFONICA DE ESPAÑA
Spain
Address
Emilio Vargas, 4-6
28043 Madrid
TELIA RESEARCH AB
Sweden
Address
Rudsjoterrassen 2
13680 Haninge