UMTS uses wideband code-division multiple access radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.
| FactSnippet No. 1,643,071 |
16 Facts About UMTS
1.
2.
UMTS specifies a complete network system, which includes the radio access network, the core network and the authentication of users via SIM cards.
| FactSnippet No. 1,643,072 |
3.
Technology described in UMTS is sometimes referred to as Freedom of Mobile Multimedia Access or 3GSM.
| FactSnippet No. 1,643,073 |
4.
Unlike EDGE and CDMA2000, UMTS requires new base stations and new frequency allocations.
| FactSnippet No. 1,643,074 |
5.
UMTS combines three different terrestrial air interfaces, GSM's Mobile Application Part core, and the GSM family of speech codecs.
| FactSnippet No. 1,643,075 |
6.
W-CDMA, along with UMTS-FDD, UTRA-FDD, or IMT-2000 CDMA Direct Spread is an air interface standard found in 3G mobile telecommunications networks.
| FactSnippet No. 1,643,076 |
7.
UMTS-TDD is not directly compatible with UMTS-FDD: a device designed to use one standard cannot, unless specifically designed to, work on the other, because of the difference in air interface technologies and frequencies used.
| FactSnippet No. 1,643,077 |
8.
Ordinary UMTS uses UTRA-FDD as an air interface and is known as UMTS-FDD.
| FactSnippet No. 1,643,078 |
9.
UMTS-FDD uses W-CDMA for multiple access and frequency-division duplex for duplexing, meaning that the up-link and down-link transmit on different frequencies.
| FactSnippet No. 1,643,079 |
10.
UMTS is usually transmitted on frequencies assigned for 1G, 2G, or 3G mobile telephone service in the countries of operation.
| FactSnippet No. 1,643,080 |
11.
UMTS-TDD uses time-division duplexing, allowing the up-link and down-link to share the same spectrum.
| FactSnippet No. 1,643,081 |
12.
UMTS specifies the Universal Terrestrial Radio Access Network, which is composed of multiple base stations, possibly using different terrestrial air interface standards and frequency bands.
| FactSnippet No. 1,643,082 |
13.
However, the migration path to UMTS is still costly: while much of the core infrastructure is shared with GSM, the cost of obtaining new spectrum licenses and overlaying UMTS at existing towers is high.
| FactSnippet No. 1,643,083 |
14.
The article UMTS frequency bands is an overview of UMTS network frequencies around the world.
| FactSnippet No. 1,643,084 |
15.
Unlike UMTS, CDMA2000 is an evolutionary upgrade to an existing 2G standard, cdmaOne, and is able to operate within the same frequency allocations.
| FactSnippet No. 1,643,085 |
16.
UMTS network introduces new network elements that function as specified by 3GPP:.
| FactSnippet No. 1,643,086 |