IMT-2000 (International Mobile Telecommunications-2000) is the global standard for third generation (
3G) wireless communications as defined by the
International Telecommunication Union
The International Telecommunication Union is a specialized agency of the United Nations responsible for many matters related to information and communication technologies. It was established on 17 May 1865 as the International Telegraph Unio ...
.
In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation. The five standards are:
* ''IMT-2000 CDMA Direct Spread''
** also known as
W-CDMA
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the Int ...
, used in
UMTS
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the In ...
, the successor to
GSM
The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such ...
* ''IMT-2000 CDMA Multi-Carrier''
** also known as
CDMA2000, the successor to
2G CDMA
Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communicatio ...
(
IS-95
Interim Standard 95 (IS-95) was the first ever CDMA-based digital cellular technology. It was developed by Qualcomm and later adopted as a standard by the Telecommunications Industry Association in TIA/EIA/IS-95 release published in 1995. The ...
)
* ''IMT-2000 CDMA TDD''
** also known as
TD-SCDMA
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the In ...
* ''IMT-2000 TDMA Single Carrier''
** also known as
EDGE
Edge or EDGE may refer to:
Technology Computing
* Edge computing, a network load-balancing system
* Edge device, an entry point to a computer network
* Adobe Edge, a graphical development application
* Microsoft Edge, a web browser developed ...
, an intermediate
2.5G
2G is a short notation for second-generation cellular network, a group of technology standards employed for cellular networks. 2G was comercially launched on the GSM standard in Finland by Radiolinja (now part of Elisa Oyj) in 1991. After 2G wa ...
technology
* ''IMT-2000 FDMA/TDMA''
** also known as
DECT
Digital enhanced cordless telecommunications (Digital European cordless telecommunications), usually known by the acronym DECT, is a standard primarily used for creating cordless telephone systems. It originated in Europe, where it is the common ...
To meet the IMT-2000 standards, a system must provide peak data rates of at 384 Kbit/s for mobile stations and 2 Mbit/s for fixed stations.
References
External links
ITU-R Recommendation M.1457 Detailed specifications of the terrestrial radio interfaces of International Mobile Telecommunications-2000 (IMT-2000).
ITU IMT-2000 Network Aspects
Mobile telecommunications standards
ITU-R recommendations
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