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There are multiple
radio access technologies used in IMT. Each has its own acronym.
It is worth noting that
telecommunications is an �acronym intensive environment� as can be seen
from the list below. Expansions of the abbreviations may be found using
the ITU-T
Terms and Definitions Database.
As of
WRC-07,
the list is:
�CDMA-Direct
Spread (Universal Terrestrial Radio Access-UTRA)
�CDMA-Multi
Carrier (CDMA2000)
�CDMA
TDD (UTRA TDD)
�TDMA
Single Carrier (UWC (Universal Wireless Communication)-136)
�FDMA/TDMA
(Digital Enhanced Cordless Communications-DECT)
�OFDMA
TDD WMAN (WiMAX)
ITU-R Recommendation
M.1457-9
(May 2010) clause 5 indicates the radio interfaces for the terrestrial
component of IMT-2000 as listed above. An overview of each radio
interface is provided in ��5.1.1, 5.2.1, 5.3.1, 5.4.1, 5.5.1 and 5.6.1.
These sections refer to specifications transposed by the 3GPP and 3GPP2
Organizational Partners into national or regional specifications which
are then submitted to ITU-R for referencing. This process is illustrated
below.
These clauses are still
quite detailed. The newcomer to IMT, before attempting to go deeper into
the individual technologies, should first review
�About mobile technology and IMT-2000�
which provides an introduction to and an overview of mobile
telecommunications. |
