IMT-2000

International Mobile Telecommunications-2000 (IMT-2000) is the global standard for third generation (3G) wireless communications as defined by the International Telecommunication Union.In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation:

* "IMT-DS Direct-Sequence"
** also known as W-CDMA or UTRA-FDD, used in UMTS
* "IMT-MC Multi-Carrier"
** also known as CDMA2000, the successor to 2G CDMA (IS-95)
* "IMT-TD Time-Division"
** This comprises: TD-CDMA (Time Division - Code Division Multiple Access) and TD-SCDMA (Time Division - Synchronous Code Division Multiple Access). Both are standardised by 3GPP in UMTS like UTRA TDD-HCR (3.84 Mcps, 5 MHz bandwidth, TD-CDMA air interface) and UTRA TDD-LCR (1.28 Mcps, 1.6 MHz bandwidth, TD-SCDMA air interface).
* "IMT-SC Single Carrier"
** also known as EDGE [http://www.itu.int/ITU-D/imt-2000/DocumentsIMT2000/Est-Growth.pdf]
* "IMT-FT Frequency Time"
** also known as DECT

On 18 October 2007 The ITU Radiocommunication Assembly took a decision to include WiMAX-derived technology in the framework of the IMT-2000 set of standards as the sixth element:
* "IP-OFDMA TDD WMAN"
** IP-OFDMA TDD WMAN is a specific variant of IEEE 802.16 with specific WiMax profiles.

References

External links

* [http://www.itu.int/newsroom/press_releases/2007/30.html ITU Radiocommunication Assembly approves new developments for its 3G standards]
* [http://www.itu.int/home/imt.html ITU home page for IMT-2000]
* [http://www.itu.int/osg/spu/imt-2000/technology.html About Mobile Technology and IMT-2000] A paper by ITU describing the various 3G standards in the IMT-2000 family