Onnowpurbo at 13:23, 13 January 2010

2010-01-13T13:23:13Z

← Older revision		Revision as of 13:23, 13 January 2010
Line 1:		Line 1:
	[[~~File~~:3G With USB cable.jpg\|thumb\|[[Huawei]] CDMA2000 [[EVDO]] USB [[wireless modem]]]]		[[Image:3G With USB cable.jpg\|thumb\|[[Huawei]] CDMA2000 [[EVDO]] USB [[wireless modem]]]]
	'''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of [[3G]] mobile technology standards, based on [[CDMA]], to send voice, data, and [[Signaling (telecommunication)\|signaling]] data between [[mobile phone]]s and [[cell site]]s. The set of standards includes: '''CDMA2000 1X''', '''CDMA2000 EV-DO Rev. 0''', '''CDMA2000 EV-DO Rev. A''', and '''CDMA2000 EV-DO Rev. B'''. All are approved radio interfaces for the [[International Telecommunication Union\|ITU]]'s [[IMT-2000]]. CDMA2000 has a relatively long technical history and is [[backward-compatible]] with its previous [[2G]] iteration [[IS-95]] (cdmaOne). In the United States, ''CDMA2000'' is a registered trademark of the [[Telecommunications Industry Association]] (TIA-USA). The intended [[4G]] successor to CDMA2000 was [[Ultra Mobile Broadband\|UMB (Ultra Mobile Broadband)]], however in November 2008, [[Qualcomm]] announced it was ending development of the technology, favoring [[3GPP Long Term Evolution\|LTE]] instead.		'''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of [[3G]] mobile technology standards, based on [[CDMA]], to send voice, data, and [[Signaling (telecommunication)\|signaling]] data between [[mobile phone]]s and [[cell site]]s. The set of standards includes: '''CDMA2000 1X''', '''CDMA2000 EV-DO Rev. 0''', '''CDMA2000 EV-DO Rev. A''', and '''CDMA2000 EV-DO Rev. B'''. All are approved radio interfaces for the [[International Telecommunication Union\|ITU]]'s [[IMT-2000]]. CDMA2000 has a relatively long technical history and is [[backward-compatible]] with its previous [[2G]] iteration [[IS-95]] (cdmaOne). In the United States, ''CDMA2000'' is a registered trademark of the [[Telecommunications Industry Association]] (TIA-USA). The intended [[4G]] successor to CDMA2000 was [[Ultra Mobile Broadband\|UMB (Ultra Mobile Broadband)]], however in November 2008, [[Qualcomm]] announced it was ending development of the technology, favoring [[3GPP Long Term Evolution\|LTE]] instead.

Onnowpurbo: New page: [[Huawei CDMA2000 EVDO USB wireless modem]] '''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of 3G mobile te...

2010-01-13T13:22:05Z

New page: thumb|[[Huawei CDMA2000 EVDO USB wireless modem]] '''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of 3G mobile te...

New page

[[File:3G With USB cable.jpg|thumb|[[Huawei]] CDMA2000 [[EVDO]] USB [[wireless modem]]]]
'''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of [[3G]] mobile technology standards, based on [[CDMA]], to send voice, data, and [[Signaling (telecommunication)|signaling]] data between [[mobile phone]]s and [[cell site]]s. The set of standards includes: '''CDMA2000 1X''', '''CDMA2000 EV-DO Rev. 0''', '''CDMA2000 EV-DO Rev. A''', and '''CDMA2000 EV-DO Rev. B'''. All are approved radio interfaces for the [[International Telecommunication Union|ITU]]'s [[IMT-2000]]. CDMA2000 has a relatively long technical history and is [[backward-compatible]] with its previous [[2G]] iteration [[IS-95]] (cdmaOne). In the United States, ''CDMA2000'' is a registered trademark of the [[Telecommunications Industry Association]] (TIA-USA). The intended [[4G]] successor to CDMA2000 was [[Ultra Mobile Broadband|UMB (Ultra Mobile Broadband)]], however in November 2008, [[Qualcomm]] announced it was ending development of the technology, favoring [[3GPP Long Term Evolution|LTE]] instead.

===1X===
'''CDMA2000 1X (IS-2000)''', also known as '''1x''' and '''1xRTT''', is the core CDMA2000 wireless air interface standard. The designation "1x", meaning ''1 times Radio Transmission Technology'', indicates the same RF bandwidth as [[IS-95]]: a [[duplex (telecommunications)|duplex]] pair of 1.25 MHz radio channels. 1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the [[forward link]], [[orthogonality|orthogonal]] to (in [[Quadrature phase|quadrature]] with) the original set of 64. The 1X standard supports packet data speeds of up to 153 [[Data_rate_units#Kilobit_per_second|kbps]] with real world data transmission averaging 60–100 kbps in most commercial applications. IMT-2000 also made changes to the [[data link layer]] for the greater use of data services, including medium and link access control protocols and [[Quality of Service|QoS]]. The IS-95 data link layer only provided "best effort delivery" for data and circuit switched channel for voice (i.e., a voice frame once every 20 ms).

===1xEV-DO===
'''CDMA2000 1xEV-DO ([[Evolution-Data Optimized]])''', often abbreviated as '''EV-DO''' or '''EV''', is a [[telecommunication]]s standard for the [[wireless]] transmission of data through [[radio]] signals, typically for [[broadband Internet access]]. It uses [[multiplexing]] techniques including [[code division multiple access]] ([[CDMA]]) as well as [[time division multiple access]] ([[TDMA]]) to maximize both individual user's throughput and the overall system throughput. It is standardized by [[3rd Generation Partnership Project 2]] (3GPP2) as part of the [[CDMA2000]] family of standards and has been adopted by many [[mobile phone]] service providers around the world – particularly those previously employing CDMA networks. It is also used on the [[Globalstar]] [[satellite phone]] network.

==Networks==
The CDMA Development Group states that, as of November 2009, there are 308 [[Mobile network operator|operator]]s in 116 countries offering CDMA2000 1X and 1xEV-DO service.

== External links ==
*[http://www.cdg.org/ CDMA2000 Development Group (CDG)]
*[http://www.3gpp2.org/ 3GPP2] Standards and specifications
*[http://www.tiaonline.org TIA] Standards documentation

CDMA2000 - Revision history

Onnowpurbo at 13:23, 13 January 2010

Onnowpurbo: New page: [[Huawei CDMA2000 EVDO USB wireless modem]] '''CDMA2000''' (also known as '''IMT Multi‑Carrier (IMT‑MC)''') is a family of 3G mobile te...