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HTC ThunderBolt, the second commercially available LTE smartphoneMobile broadband is the marketing term for wireless Internet access through a portable modem, mobile phone, USB wireless modem, tablet or other mobile devices. The first wireless Internet access became available in 1991 as part of the second generation (2G) of mobile phone technology. Higher speeds became available in 2001 and 2006 as part of the third (3G) and fourth (4G) generations.

In 2011, 90% of the world's population lived in areas with 2G coverage, while 45% lived in areas with qualcomm 3g hsdpa wikipedia and 3G coverage. [1] Mobile broadband uses the spectrum of 225 MHz to 3700 MHz. [2] Contents� 1 Description� 2 Generations� 3 Coverage� 4 Subscriptions and usage� 5 Development� 5.1 In use and under active development� 5.1.1 GSM family� 5.1.2 IEEE 802.16 (WiMAX)� 5.2 In use, but moving to other protocols going forward� 5.2.1 CDMA family� 5.2.2 IEEE 802.20� 6 See also� 7 References� 8 External linksDescription [ edit ]Mobile broadband is the marketing term for wireless Internet access delivered through mobile phone towers to computers, mobile phones (called "cell phones" in North America and South Africa), and other digital devices using portable modems.

Wokipedia broadband has a technical meaning, wireless-carrier marketing uses the phrase "mobile broadband" as a synonym for mobile Internet access. Some mobile services allow more than one device to be connected wiikpedia the Internet using a single cellular connection using a process called tethering.

[3]The bit rates available with Mobile broadband devices support voice and video as well as other data access. Devices that provide mobile broadband to mobile computers include:� PC cards, also known as PC data cards, and Express cards� USB and mobile broadband modems, also known as connect cards� portable devices with built-in support for mobile broadband, such as laptop computers, netbook computers, smartphones, tablets, PDAs, and other mobile Internet devices.Internet access subscriptions are usually sold separately from mobile phone subscriptions.

Generations [ edit ]Roughly every ten years new mobile phone technology and infrastructure involving a change in wkiipedia fundamental nature of the service, non-backwards-compatible transmission technology, higher peak data rates, new frequency bands, wider channel frequency bandwidth in Hertz becomes available.

These transitions are referred to as generations. The first mobile data services became available during the second generation (2G). [4] [5] [6] Second generation (2G) from 1991: 3v in kbit/sdown and up� GSM CSD9.6� CDPDup to 19.2� GSM GPRS (2.5G)56�115� GSM EDGE (2.75G)up to 237Third generation (3G) from 2001: Speeds in Mbit/sdownup� UMTS W-CDMA0.4� UMTS HSPA14.45.8� UMTS TDD16� CDMA2000 1xRTT0.30.15� CDMA2000 EV-DO2.5�4.90.15�1.8� GSM EDGE-Evolution1.60.5Fourth generation (4G) from 2006: Speeds in Mbit/sdownup�HSPA+21�6725.8�168�Mobile WiMAX (802.16)37�36517�376�LTE100�30050�75�LTE-Advanced:� while moving at high speeds100� while stationary or moving at low speedsup to 1000�MBWA (802.20)80 The download (to the user) and upload (to the Internet) data rates given above are peak or maximum rates and end hsxpa will typically experience lower data rates.WiMAX was originally developed to deliver fixed wireless service with wireless mobility added in 2005.

CDPD, CDMA2000 EV-DO, and MBWA are no longer being actively developed. Coverage [ edit ] Mobile broadband Internet subscriptions in 2012as a percentage of a country's populationSource: International Telecommunications Union. [7]In 2011, 90% of qulacomm world's population lived in areas with 2G coverage, while 45% lived in areas with 2G and 3G coverage, [1] and 5% lived in areas with 4G coverage.

By 2017 more than 90% of the world's population quaalcomm expected to have 2G coverage, 85% is expected to have 3G coverage, and 50% will have 4G coverage. [8]A barrier to mobile broadband use is the coverage provided by the mobile phone networks.

This may mean no mobile phone service or that service is limited to older and slower mobile broadband technologies. Customers will not always be able to achieve the speeds advertised due to mobile data coverage limitations including distance to the cell tower. In addition, there are issues with connectivity, network capacity, application quality, and mobile network operators' overall inexperience with data traffic.

[9] Peak speeds experienced by users are also often limited by the capabilities of their smartphone or other mobile device. [8] Subscriptions and usage [ edit ] Worldwide broadband subscriptions200720102014 aWorld population [10]6.6 billion6.9 billion7.2 billionFixed broadband5%8%10%Developing world2%4%6%Developed world18%24%27%Mobile broadband4%11%32%Developing world1%4%21%Developed world19%43%84%a Estimate.Source: International Telecommunications Union.

[11]Broadband subscriptions by region Fixed subscriptions:200720102014 aAfrica0.1%0.2%0.4%Americas11%14%17%Arab States1%2%3%Asia and Pacific3%6%8%Commonwealth ofIndependent States2%8%14%Europe18%24%28%Mobile subscriptions:200720102014 aAfrica0.2%2%19%Americas6%23%59%Arab States0.8%5%25%Asia and Pacific3%7%23%Commonwealth ofIndependent States0.2%22%49%Europe15%29%64%a Estimate.Source: International Telecommunications Union.

[11]It is estimated that there were 6.6 billion mobile phone subscriptions worldwide at the end of 2012 (89% penetration), representing roughly 4.4 billion subscribers (many people have more than one subscription). Growth has been around 9% year-on-year. [12] Mobile phone subscriptions are expected to reach 9.3 billion in 2018. [8]At the end of 2012 there were roughly 1.5 billion mobile broadband subscriptions growing at a 50% year-on-year rate.

[12] Mobile broadband subscriptions are expected to reach 6.5 billion in 2018. [8]Mobile data traffic doubled between the end of 2011 (~620 Petabytes in Q4 2011) and the end of 2012 (~1280 Petabytes in Q4 2012). [12] This traffic growth is and will continue to be driven by large increases in the number of mobile subscriptions and by increases in the average data traffic per subscription due to increases in the number of smartphones being sold, the use of more demanding applications and in particular video, and the availability and deployment of newer 3G and 4G technologies capable of higher data rates.

By 2018 total mobile broadband traffic is expected to increase by a factor of 12 to roughly 13,000 PetaBytes. [8]On average, a mobile PC generates approximately seven times more traffic than a smartphone (3 GB vs. 450 MB/month). By 2018 this ratio is likely to fall to 5 times (10 GB vs. 2 GB/month). Traffic from smartphones that tether (share the data access of one device with multiple devices) can be up to 20 times higher than that from non-tethering users and averages between 7 and wikipediaa times higher.

quacomm too that there are large differences in subscriber and traffic patterns between different provider networks, regional markets, device and user types. [8]Demand from emerging markets has and continues to fuel growth in both mobile phone and mobile broadband subscriptions and use.

Lacking a widespread fixed line infrastructure, many emerging markets leapfrog developed markets and use qualcomm 3g hsdpa wikipedia broadband technologies to deliver high-speed internet access to qualconm mass market. Development [ edit ] Further information: List of LTE networks and List of HSPA+ networksIn 1995 telecommunication, mobile phone, integrated-circuit, and laptop computer manufacturers formed the GSM Association to push for built-in support for mobile-broadband technology on notebook computers.

The association established a service mark to identify devices that include Internet connectivity. [13] Established in early 1998, the global Third Generation Partnership Project (3GPP) develops the evolving GSM family of standards, which includes GSM, EDGE, WCDMA, HSPA, and LTE. [14] In 2011 these standards were the most used method to deliver mobile broadbandHSPA+ sign shown in notification bar on an Android-based smartphone.Evolved High Speed Packet Access, or Wikipsdia, is a technical standard for wireless, broadband telecommunication.

It is the second phase of HSPA which has been introduced in 3GPP release 7 and being further improved in later 3GPP releases. HSPA+ can achieve data rates wwikipedia up to 42.2�Mbit/s.

[1] It introduces antenna array technologies such as beamforming and Multiple-input multiple-output communications (MIMO). Beam forming focuses the transmitted power of an antenna in a beam towards the user�s direction.

MIMO uses multiple antennas at the sending and receiving side. Further releases of the standard have introduced dual carrier operation, i.e. the simultaneous use of two 5�MHz carriers.

The technology also delivers significant battery life improvements and dramatically quicker wake-from-idle time, delivering a true always-on connection. HSPA+ is an evolution of HSPA that upgrades the existing 3G network and provides a method for telecom operators to migrate towards 4G speeds that are more comparable to the initially available speeds of newer LTE networks without deploying a new radio interface.

HSPA+ should not be confused with LTE though, which uses an air interface based on Orthogonal frequency-division multiple access modulation and multiple access. [2]Advanced HSPA+ is a further evolution of HSPA+ and provides data rates up to 84.4 and 168 Megabits per second (Mbit/s) to the mobile device (downlink) and 22�Mbit/s from the mobile device (uplink) under ideal signal conditions. Technically these are achieved through the use of a multiple-antenna technique known as MIMO (for "multiple-input and multiple-output") and higher order modulation (64QAM) or combining multiple cells into one with a technique known as Dual-Cell HSDPA. Contents� 1 Downlink� 1.1 Evolved HSDPA (HSPA+)� 1.2 Dual-Carrier HSDPA (DC-HSDPA)� 1.3 User Equipment (UE) Categories� 2 Uplink� 2.1 Dual-Carrier HSUPA (DC-HSUPA)� 2.2 User Equipment (UE) Categories� 3 Multi-carrier HSPA (MC-HSPA)� 4 All-IP architecture� 5 Deployment� 6 See also� 7 References� 8 External linksDownlink [ edit ] Evolved HSDPA (HSPA+) [ edit ]An Wiikpedia HSDPA network can theoretically support up to 28�Mbit/s and 42�Mbit/s with a single 5�MHz carrier for Rel7 (MIMO with 16QAM) and Rel8 ( 64-QAM + MIMO), in good channel conditions with low correlation between transmit antennas.

Although real speeds are far lower. Besides the throughput gain from doubling the number of cells to be used, some diversity and joint scheduling gains can also be achieved. [3] The QoS (Quality of Service) can be particularly improved for end users in poor radio reception where they cannot benefit from the other WCDMA capacity improvements (MIMO and higher order modulations) due to poor radio signal quality.

In 3GPP a study item was completed in June 2008. The outcome can be found in technical report 25.825. [4] An alternative method to double the data rates is to double the bandwidth to 10�MHz (i.e. 2?5�MHz) by using DC-HSDPA. Dual-Carrier HSDPA (DC-HSDPA) [ edit ]Dual-Carrier HSDPA, also known as Dual-Cell HSDPA, is part of 3GPP Release 8 specification. It is the natural evolution of HSPA by means of carrier aggregation in the downlink.

UMTS licenses are often issued as 5, 10, or 20�MHz paired spectrum allocations. The basic idea of the multicarrier feature is to achieve better resource utilization and spectrum efficiency by means of joint resource allocation and load balancing across the downlink carriers.

[5]New HSDPA User Equipment categories 21-24 have been introduced that support DC-HSDPA. DC-HSDPA can support up to 42.2�Mbit/s, but unlike HSPA, it does not need to rely on MIMO transmission.The support of MIMO in combination with DC-HSDPA will allow operators deploying Release 7 MIMO to benefit from the DC-HSDPA functionality as defined in Release 8.

While in Release 8 DC-HSDPA can only operate on adjacent carriers, Qualocmm 9 also allows that the paired cells can operate on two different frequency bands. Later releases allow the use of up to four carriers simultaneously.From Release 9 onwards it will be possible to use DC-HSDPA in combination with MIMO being used on both carriers. The support of MIMO in combination with DC-HSDPA will allow operators even more capacity improvements within their network.

This will allow theoretical speed of up to 84.4�Mbit/s. [6] [7] User Equipment (UE) Categories [ edit ]The following table is derived from table 5.1a of the release 11 of 3GPP TS 25.306 [8] and shows maximum data rates of different device hsdpx and qualcomm 3g hsdpa wikipedia what combination of features they are achieved.

The per-cell per-stream data rate is limited quaalcomm the Maximum number of bits of an HS-DSCH transport block received within an HS-DSCH TTI and the Minimum inter-TTI interval. The TTI is 2 ms. So for example Cat 10 can decode 27952 bits/2 ms = 13.976�MBit/s (and not 14.4�MBit/s as often claimed incorrectly). Categories 1-4 and 11 have inter-TTI intervals of 2 or 3, which reduces the maximum data rate by that factor.

Dual-Cell and MIMO 2x2 each multiply the maximum data rate by 2, because multiple independent transport blocks are transmitted over different carriers or spatial streams, respectively. The data rates given in the table are rounded to one decimal point. Evolved HSDPA User Equipment (UE) categoriesCategoryReleaseMax. numberof HS-DSCHcodes (per cell)Modulation [note 1]MIMO, Multi-CellCode rateat max. DataRate [note 2]Max. DownlinkSpeed(Mbit/s) [note 3]1371564-QAM.8217.61471564-QAM.9821.11571516-QAMMIMO 2x2.8123.41671516-QAMMIMO 2x2.9728.01771564-QAM.8217.61516-QAMMIMO 2x2.8123.41871564-QAM.9821.11516-QAMMIMO 2x2.9728.0198 [note 4]1564-QAMMIMO 2x2.8235.3208 [note 5]1564-QAMMIMO 2x2.9842.22181516-QAMDual-Cell.8123.42281516-QAMDual-Cell.9728.02381564-QAMDual-Cell.8235.32481564-QAMDual-Cell.9842.22591516-QAMDual-Cell + MIMO 2x2.8146.72691516-QAMDual-Cell + MIMO 2x2.9755.92791564-QAMDual-Cell 3y MIMO 2x2.8270.62891564-QAMDual-Cell + MIMO 2x2.9884.429101564-QAMTriple-Cell.9863.330101564-QAMTriple-Cell + MIMO 2x2.98126.631101564-QAMQuad-Cell.9884.432101564-QAMQuad-Cell + MIMO bsdpa + MIMO 2x2.98253.235111564-QAMOcta-Cell.98168.836111564-QAMOcta-Cell + MIMO 2x2.98337.537111564-QAMDual-Cell + MIMO 4x4.98168.838111564-QAMQuad-Cell + MIMO 4x4.98337.5Notes: � ^ 16-QAM implies QPSK support, 64-QAM implies 16-QAM and QPSK support.� ^ The maximal code rate is not limited.

A value close to 1 in this column indicates that the maximum data rate can be achieved only in ideal conditions. The device is therefore connected directly to the transmitter to demonstrate these data rates.� ^ The maximum data rates given in the table are physical layer data hsdp. Application layer data rate is approximately 85% of that, due to the inclusion of IP headers ( overhead information) etc.� ^ Category 19 was specified in Release 7 as "For further use".

Not until Release 8 simultaneous use of 64QAM and MIMO were allowed to obtain the specified max. data rate.� ^ Category 20 was specified in Release 7 as "For further use".

Not until Release 8 simultaneous use of 64QAM and MIMO were allowed to obtain the specified max. data rate.Uplink [ edit ] Dual-Carrier HSUPA (DC-HSUPA) [ edit ]Dual-Carrier HSUPA, also known as Dual-Cell HSUPA, is a wireless broadband standard based on HSPA that is defined in 3GPP UMTS release 9. Dual Cell (DC-)HSUPA is the natural evolution of HSPA by means of carrier aggregation in the uplink.

[9] UMTS licenses are often issued quualcomm 10 or 15�MHz paired spectrum allocations. The basic idea of the multicarrier feature is to achieve better resource utilization and spectrum efficiency by means of joint resource allocation and load balancing across the uplink carriers.Similar enhancements as introduced with Dual-Cell HSDPA in the downlink for 3GPP Release 8 were standardized for the uplink in 3GPP Release 9, called Dual-Cell HSUPA.

The sHSPA sign shown in notification bar on an Android-based (Samsung) smartphone.High Speed Packet Access ( HSPA) [1] is an amalgamation of two mobile protocols, High Speed Qualfomm Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing 3G mobile telecommunication networks utilizing the WCDMA protocols. A further improved 3GPP standard, Evolved High Speed Packet Access (also known as HSPA+), was released late in 2008 with subsequent worldwide adoption beginning in 2010.

The newer standard allows bit-rates to reach as high as 337�Mbit/s in the downlink and 34�Mbit/s in the uplink. However, these speeds are rarely achieved in practice. [2] Contents� 1 Overview� 2 High Speed Downlink Packet Access (HSDPA)� 2.1 User Equipment (UE) categories� 2.2 Adoption� 3 High Speed Uplink Packet Access (HSUPA)� 3.1 Technology� 3.2 User Equipment (UE) Categories� 4 Evolved High Speed Packet Access (HSPA+)� 5 See also� 6 References� 7 Bibliography� 8 External linksOverview [ edit ]The first HSPA specifications supported increased peak data rates of up to 14 Mbit/s in the downlink and 5.76 Mbit/s in the uplink.

It also reduced latency and provided up to five wiiipedia more system capacity in the downlink and up to twice as much system capacity in the uplink compared with original WCDMA protocol. High Speed Downlink Packet Access (HSDPA) [ edit ]High Speed Downlink Packet Access (HSDPA) is an enhanced 3G (third-generation) mobile communications protocol in the High-Speed Packet Access (HSPA) family, also dubbed 3.5G, 3G+, or Turbo 3G, which allows networks based on Universal Quakcomm Telecommunications System (UMTS) to have higher data speeds and capacity.

HSDPA has been introduced with 3GPP Release 5, which also accompanies an improvement on the uplink providing a new bearer of 384�kbit/s. The previous maximum bearer was 128�kbit/s. As well as improving data rates, HSDPA also decreases latency and so the round trip time for applications.

HSPA+ introduced in 3GPP Release 7 further increases data wikipedis by adding 64QAM modulation, MIMO and Dual-Cell HSDPA operation, i.e. two 5�MHz carriers are used simultaneously. Even higher speeds of up to 337.5�Mbit/s are possible with Release 11 of the 3GPP standards.

[3]The first phase of HSDPA has been specified in the 3GPP release 5. Phase one introduces new basic functions and is aimed to achieve peak data rates of 14.0�Mbit/s with significantly reduced latency. The improvement in speed and latency reduces the cost per bit and enhances support for high-performance packet data applications. HSDPA is based on shared channel transmission and its key features are shared channel and multi-code transmission, quacomm modulation, short transmission time interval (TTI), qualco,m link adaptation and scheduling along with fast hybrid automatic repeat request (HARQ).

Further new features are the Wukipedia Speed Downlink Shared Channels (HS-DSCH), the adaptive modulation QPSK and 16QAM and the High Speed Medium Access protocol (MAC-hs) in base station.The upgrade to HSDPA is often just a software update for WCDMA networks.

In general voice calls are usually prioritized over data transfer.vijin User Equipment (UE) categories [ edit ]The following table is derived from table 5.1a of the release 11 of 3GPP TS 25.306 [4] and shows maximum data rates of different device classes and by what combination of features they are achieved.

The per-cell per-stream data rate is limited by the Maximum number of bits of an HS-DSCH transport block received within an HS-DSCH TTI and the Minimum inter-TTI interval. The TTI is 2 ms. So for example Cat 10 can decode 27952 wjkipedia ms = 13.976�MBit/s (and not 14.4�MBit/s as often claimed incorrectly). Categories 1-4 and 11 have inter-TTI intervals of 2 or 3, which reduces the maximum data rate by that factor. Dual-Cell and MIMO 2x2 each multiply the maximum data rate by 2, because multiple independent transport blocks are transmitted over different carriers or spatial streams, respectively.

The data rates given in the table are rounded to one decimal point. HSDPA User Equipment (UE) categoriesCategoryReleaseMax. numberof HS-DSCHcodes (per cell)Modulation [note 1]MIMO, Multi-CellCode rateat max. DataRate [note 2]Max. DownlinkSpeed(Mbit/s) [note 3]15516-QAM.761.225516-QAM.761.235516-QAM.761.845516-QAM.761.855516-QAM.763.665516-QAM.763.6751016-QAM.757.2851016-QAM.767.2951516-QAM.7010.11051516-QAM.9714.01155QPSK.760.91255QPSK.761.8Further UE categories were defined from 3GGP Release 7 onwards as Evolved HSPA (HSPA+) and are listed in Evolved HSDPA UE Categories.

Notes: � ^ 16-QAM implies QPSK support, wikipedoa implies 16-QAM and QPSK support.� ^ The maximal code rate is not limited. A value close to 1 in this column indicates that the maximum data rate can be 3b only in ideal conditions. The device is therefore connected directly to the transmitter to demonstrate these data rates.� ^ The maximum data rates given in the table are physical layer data rates.

Application layer data rate is approximately 85% of that, qalcomm to the inclusion qikipedia IP headers ( overhead information) etc.Adoption [ edit ] GPRS-speed in a HSDPA planAs of 28 August 2009 [update], 250 HSDPA networks have commercially launched mobile broadband services in 109 countries. 169 HSDPA networks support 3.6�Mbit/s peak downlink data throughput. A growing number are delivering 21�Mbit/s peak data downlink and 28�Mbit/s.CDMA2000- EVDO networks had the early lead on performance, and Japanese providers were highly successful benchmarks for it.

But lately this seems to be changing in favour of HSDPA as an increasing number of providers worldwide are adopting it.During 2007, an increasing number of telcos worldwide began selling HSDPA USB modems to provide mobile broadband connections. In addition, the popularity of HSDPA landline replacement boxes grew�providing HSDPA for data via Ethernet and WiFi, and ports for connecting traditional landline telephones. Some are marketed with connection speeds of "up to 7.2�Mbit/s", [5] which is only attained under ideal conditions.

As a result, these services can be slower than expected, when in fringe coverage indoors. High Speed Uplink Packet Access (HSUPA) [ edit ]High-Speed Uplink Packet Access (HSUPA) is a 3G mobile telephony protocol in the HSPA family. This technology was the second major step in the UMTS evolution process. It was specified and standardized in 3GPP Release 6 to improve the uplink data rate to 5.76 Mbit/s, extending the capacity, and reducing latency. Together with additional improvements which are detaileld below this creates opportunities for a number of new applications including VoIP, uploading pictures and sending large e-mail messages.In the meanwhile HSUPA has been superseded by newer technologies further advancing transfer rates.

LTE provides up to 300�Mbit/s for downlink and 75�Mbit/s for uplink. Its evolution LTE Advanced supports maximum downlink rates of over 1 Gbit/s. Technology [ edit ]Enhanced Uplink adds a new transport channel to WCDMA, called the Enhanced Dedicated Channel (E-DCH). Further it features several improvements similar to those of HSDPA, including multi-code transmission, shorter Transmission Time Interval (TTI) enabling faster link adaptation, fast scheduling and fast Hybrid Automatic Repeat Request ( HARQ) with incremental redundancy making retransmissions more effective.

Similarly to HSDPA, HSUPA uses a packet scheduler, but it operates on a request-grant principle where the UEs request a permission to send data and the scheduler decides when and how many UEs qulacomm be allowed to do so. A hadpa for transmission contains data about the state of the transmission buffer and the queue at the UE and its available power margin. However, unlike HSDPA, uplink transmissions are not orthogonal to each other.In wimipedia to this scheduled mode of transmission the standards also allows a self-initiated transmission mode from the UEs,This article may be too technical for most readers to understand.

Please help improve this wukipedia to make it understandable to non-experts, without removing the technical wi,ipedia. The talk page may contain suggestions. (October 2011) ( Learn how and when to remove this template message) This article needs to be updated. Please update this article to reflect recent events or newly available information.

(April 2016)( Learn how and when to remove this template message)3G, short for third generation, is the third generation of wireless mobile telecommunications technology. This is based on a set of standards used for mobile devices and mobile telecommunications use services and networks that comply with the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union.

3G finds application in wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV.3G telecommunication networks support services that provide an information transfer rate of at least 200 kbit/s. Later 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadband access of several Mbit/s to smartphones and mobile modems in laptop computers. This ensures it can be applied to wireless voice telephony, bsdpa Internet access, fixed wireless Internet access, video calls and mobile TV technologies.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1981/1982.

Each generation is characterized by new frequency bands, higher data rates and non�backward-compatible transmission technology. The first 3G networks were introduced in 1998 and fourth generation 4G networks in 2008. Contents� 1 Overview� 1.1 Break-up of 3G systems� 2 History� 3 Adoption� 3.1 Market penetration� 4 Patents� 5 Features� 5.1 Data rates� 5.2 Security� hsda Applications of 3G� 6 Evolution� 7 See also� 8 References� 9 External linksOverview [ edit ]Several telecommunications companies market wireless mobile Internet services as 3G, indicating that the advertised service is provided over a 3G wireless network.

Services advertised as 3G are required to meet IMT-2000 technical standards, including standards for reliability and speed (data transfer rates). To meet the IMT-2000 standards, a qualxomm is required to provide peak data rates of at least 200 kbit/s (about 0.2 Mbit/s). Wikipfdia, many services advertised as 3G provide higher speed than the minimum technical requirements for a 3G service. Recent 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadband access of several Mbit/s to smartphones and mobile modems in laptop computers.The following standards are typically branded 3G:� the UMTS (Universal Mobile Telecommunications Service) system, first offered in 2001, standardized by 3GPP, used primarily in Europe, Japan, China (however with a different radio interface) and other regions predominated by GSM (Global Systems for Mobile) 2G system infrastructure.

The cell phones are typically UMTS and GSM hybrids. Several radio interfaces are offered, sharing the same infrastructure:� The original and most widespread radio interface is called W-CDMA (Wideband Code Division Multiple Access).� The TD-SCDMA radio interface was commercialized in 2009 and is only offered in China.� The latest UMTS release, HSPA+, can provide peak data rates up to 56�Mbit/s in the downlink in theory (28�Mbit/s in existing services) and 22�Mbit/s in qualvomm uplink.� the CDMA2000 system, first offered in 2002, qkalcomm by 3GPP2, used especially in North America and South Korea, sharing infrastructure with the IS-95 2G standard.

The cell phones are typically CDMA2000 and IS-95 hybrids. The latest release EVDO Rev B offers peak rates of 14.7 Mbit/s downstream.The above systems and radio interfaces are based on spread spectrum radio transmission technology. While the GSM EDGE standard ("2.9G"), DECT cordless phones and Mobile WiMAX standards formally also fulfill the IMT-2000 requirements and are approved hsdpz 3G standards by ITU, these are typically not branded 3G, and are based on completely different technologies.The following common standards comply with the IMT2000/3G standard:� EDGE, a revision by the 3GPP organization to the older 2G GSM based transmission methods, utilizing the same switching nodes, base station sites and frequencies as GPRS, but new base station and cellphone RF circuits.

It is based on the three times as efficient 8PSK modulation scheme as supplement to the original GMSK modulation scheme. EDGE is still used extensively due to its ease of upgrade from existing 2G GSM infrastructure and cell-phones.� EDGE combined with the GPRS 2.5G technology is called EGPRS, and allows peak data rates in the order of 200 kbit/s, just as the original UMTS WCDMA versions, and thus formally fulfills the IMT2000 requirements on 3G systems.

However, in practice EDGE is seldom nsdpa as a 3G system, but a 2.9G system. EDGE shows slightly better system spectral efficiency than the original UMTS and CDMA2000 systems, but it is difficult to reach much higher peak data rates due to the limited GSM spectral bandwidth of 200�kHz, and it is thus a dead end.� EDGE was also a mode in the IS-135 TDMA system, today ceased.� Evolved EDGE, the latest revision, has peaks of 1 Mbit/s downstream and 400 kbit/s upstream, but is not hspa used.� The Universal Mobile Telecommunications System, created and revised by the 3GPP.

The family is a full revision from GSM in terms of encoding methods and hardware, although some GSM sites can be retrofitted to broadcast in the UMTS/ W-CDMA format.� W-CDMA is the most common deployment, commonly operated on the 2,100�MHz band. A few others use the 850, 900 and 1,900�MHz bands.� Iwkipedia is an amalgamation of several upgrades to the original W-CDMA standard and offers speeds of 14.4�Mbit/s down and 5.76�Mbit/s up.

HSPA is backward-compatible with and uses the same frequencies as W-CDMA.� HSPA+, a further revision and upgrade of HSPA, can provide theoretical peak data rates up to 168�Mbit/s in the downlink and 22�Mbit/s in the uplink, using a combination of air interface improvements as well as multi-carrier HSPA and MIMO. Technically though, MIMO and DC-HSPA can be wikipediaa without the "+" enhancements of HSPA+� The CDMA2000 system, or IS-2000, including CDMA2000 1x and CDMA2000 High Rate Packet Data (or EVDO), standardized by 3GPP2 ( differing from the 3GPP), evolving from the original IS-95 CDMA system, is used especially in North America, China, India, Pakistan, Japan, South Korea, Southeast Asia, Europe and Africa.� CDMA2000 1x Rev.

E has an increased voice capacity (in excess of three times) compared to Rev. 0 EVDO Rev. B offers downstream peak rates of 14.7�Mbit/s while Rev. C enhanced existing and new terminal user experience.While DECT cordless phones and Mobile WiMAX standards formally also fulfill the IMT-2000 requirements, they are not usually considered due to their rarity and wikpiedia for usage with mobile phones.

Break-up of 3G systems [ edit ]The 3G (UMTS and CDMA2000) research and development projects started in 1992. In 1999, ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation; WiMAX was added in 2007. [1]There are evolutionary standards (EDGE and CDMA) that are backward-compatible extensions to pre-existing 2G networks as well as revolutionary standards that require all-new network hardware and frequency allocations.

The cell phones utilise UMTS in combination with 2G GSM standards and bandwidths, but do not support EDGE. The latter group is the UMTS family, which consists of standards developed for IMT-2000, as well as the independently developed standards DECT and WiMAX, which were included because they fit the IMT-2000 definition.While EDGE fulfills the 3G specifications, most GSM/UMTS phones wikipedka EDGE ("2.75G") and UMTS ("3G") functionality.

History [ edit ]3G technology is This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. quslcomm 2007) ( Learn how and when to remove this template message)A comparison of mobile phone standards can be done in many ways. Contents� 1 Issues� 2 Comparison table� 3 Strengths and Weaknesses of IS-95 and GSM [4]� 3.1 Advantages of GSM� 3.2 Disadvantages of GSM� 3.3 Advantages of IS-95� 3.4 Disadvantages of IS-95� 4 Development of the Market Share of Mobile Standards� 5 Comparison of wireless Internet standards� 6 See also� 7 ReferencesIssues [ edit ]Global System for Mobile Communications (GSM, around 80�85% market share) and IS-95 (around 10�15% market share) were the two most prevalent 2G mobile communication technologies in 2007.

[1] In 3G, the most prevalent technology was UMTS with CDMA-2000 in close wikipecia radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.� Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices.

Each user of the channel takes turns to transmit and receive signals. In reality, only one person is actually using the channel at a specific moment. This is analogous to time-sharing on a large computer server.� Frequency-division multiple access (FDMA) provides multiuser access by separating the used frequencies.

This is used in GSM to separate cells, which then use TDMA to separate users within the cell.� Code-division multiple access (CDMA) This uses a digital modulation called spread spectrum qikipedia spreads the voice data over a very wide channel in pseudorandom fashion using a user or cell specific pseudorandom code. The receiver undoes the randomization to collect the bits together and produce the original data. As the codes are pseudorandom and selected in such a way as to cause minimal interference to one another, multiple users can talk at the same time and multiple cells can share the same frequency.

This causes an added signal noise forcing all users to use more power, which in exchange decreases cell range and battery life.� Orthogonal Frequency Division Multiple Access (OFDMA) uses bundling of multiple small frequency bands that are orthogonal to one another wikipfdia provide for separation of users. The users are multiplexed in the frequency domain by allocating specific sub-bands to individual users. This is often enhanced by also performing TDMA and changing the allocation periodically so that different users get different sub-bands at different times.In theory, CDMA, TDMA and FDMA have exactly the same spectral efficiency but practically, each has its own challenges � power control in the case of CDMA, timing in the case of TDMA, and frequency generation/filtering in the case of FDMA.For a classic example for understanding the fundamental difference of TDMA and CDMA, imagine a cocktail party wkipedia couples are talking to each other in a single room.

The room represents the available bandwidth: TDMA: A speaker takes turns talking to a listener. The speaker talks for a short time and then stops to let another couple talk. There is never more than one speaker talking in the room, no one has to worry about two conversations mixing. The drawback is that it limits the qikipedia number of discussions in the room (bandwidth wise). CDMA: any speaker can talk at any time; however each uses a different language.

Each listener can only understand the language of their partner. As more and more couples talk, the background noise (representing the noise floor) gets louder, but because of the difference in languages, conversations do not mix. The drawback is that at some point, one cannot talk any louder. After this if the noise still rises (more people join the party/cell) the listener cannot make out what the talker is talking about without coming closer to the talker. In effect, CDMA cell coverage decreases as the number of active users increases.

This is called cell breathing. Comparison table [ edit ] FeatureNMTGSMUMTS (3GSM)IS-95 (CDMA one)IS-2000 (CDMA 2000)LTETechnologyFDMATDMA and FDMAW-CDMACDMACDMAOFDMAGeneration1G2G3G2G3G4GEncodingAnalogDigitalDigitalDigitalDigitalDigitalYear of First Use19811991200119952000 / 20022009RoamingNordics and several other European countriesWorldwide, all countries except Japan and South KoreaWorldwideLimitedLimitedLimitedHandset interoperabilityNoneSIM cardSIM cardNoneRUIM (rarely used)SIM cardCommon InterferenceNoneSome electronics, e.g.

amplifiersNoneNoneNoneNoneSignal quality/coverage areaGood coverage due to low frequenciesGood coverage indoors on 850/900�MHz. Repeaters possible. 35�km hard limit.Smaller cells and lower indoors coverage on 2100�MHz; equivalent coverage indoors and superior wikipwdia to GSM on 850/900�MHz.Unlimited cell size, low transmitter power permits large cellsUnlimited cell size, low transmitter power permits large cellsFrequency utilization/Call quxlcomm low density0.2�MHz = 8 timeslots.

Each timeslot can hold up to 2 calls (4 calls with VAMOS) through interleaving.5�MHz = 2 Mbit/s. 42Mbit/s for HSPA+. Each call uses 1.8-12 kbit/s depending on chosen quality and audio complexity.Lower than CDMA-2000?1.228 MHz = 3Mbit/sHandoffHardHardSoftSoftSoftHardVoice and Data at the same timeNoYes GPRS Class AYes [2]NoNo EVDO / Yes SVDO [3]No (data only)Voice possible though VoLTE or fallback to 2G/3GRevision and network compatibility Standard or RevisionNetwork CompatibilityGSM (1991), GPRS (2000), EDGE (2003)GSM ( 2G, TDMA)cdmaOne (1995)cdmaOne ( 2G, CDMA)EV-DO (1999), Rev.

A (2006), Rev. B (2006), SVDO (2011)CDMA2000 ( 3G, CDMA/ TDMA)UMTS (1999), HSDPA (2005), HSUPA (2007), HSPA+ (2009)UMTS ( 3G, CDMA)LTE (2009, 3G), LTE Advanced (2011, 4G)LTE ( OFDMA)Strengths and Weaknesses of IS-95 and GSM [4] [ edit ] Advantages of GSM [ edit ]� Less signal deterioration inside buildings.� Ability to use repeaters.� Talktime is generally higher in GSM phones due to the pulse nature of transmission.� The availability of Subscriber Identity Modules allows 3v to switch networks and handsets at will, aside from a subsidy lock.� 33g covers virtually all parts of the world so international roaming is not a problem.� The much bigger number of subscribers globally creates a better network effect for GSM handset makers, carriers and end users.Disadvantages of GSM [ edit ]� Interferes with some electronics, especially certain audio amplifiers.� Intellectual property is concentrated among a few industry participants, creating barriers wikipeeia entry for new entrants and limiting competition among phone manufacturers.

Situation is however worse in CDMA-based systems like IS-95, where Qualcomm is the major IP holder. [ citation needed]� GSM has a fixed maximum cell site range of 120�km, [5] which is imposed by wikipediw limitations.

[6] This is expanded from the old limit of 35�km.Advantages of IS-95 [ edit ]� Capacity is IS-95's biggest asset; it can accommodate more users per MHz of bandwidth than any other technology.� Has no built-in limit to the number of concurrent users.� Uses precise clocks that do not limit the distance a tower can cover.

[7]� Consumes less power and covers large areas so cell size in IS-95 is larger.� Able to produce a reasonable call with lower signal (cell phone reception) levels.� Uses soft handoff, reducing the likelihood of dropped calls.� IS-95's variable rate voice coders reduce the rate being transmitted when speaker is not talking, which allows the channel qualclmm be packed more efficiently.� Has a well-defined path to higher data rates.Disadvantages of IS-95 [ edit ]� Most technologies are patented and must be licensed from Qualcomm.� Breathing of base stations, where coverage area shrinks under load.

As the number of subscribQualcomm Gobi is a family of embedded mobile broadband modem products by Qualcomm. Gobi technology was designed to allow for any product with the embedded solution to connect to the internet anywhere a wireless carrier provides wikiledia coverage.

One of the more notable products that contain a Gobi modem is the iPhone 4 for Verizon, which contains a MDM6600�, however it does not take advantage of the support for HSPA+. [1] Contents� 1 History� 2 Products� 3 Model Names and Real World Names� 4 Awards� 5 See also� 6 References� 7 External linksHistory [ edit ]On October 23, 2007, Qualcomm announced the first set of Gobi-enabled chipsets to be commercially available in the second quarter of 2008.

[2] [3] The first chip produced by Qualcomm, the MDM1000�, gained support from PC manufacturer HP [4] as well as wireless carriers Vodafone and Verizon. [5]Two years later, on February 11, 2009, Qualcomm announced the second generation of Gobi-enabled chipsets, the MDM2000�.

The MDM2000� added support for additional frequencies which are prevalent in Japan and rural Europe, improved uplink capabilities and other software upgrades. [6]The third, and most recent, generation of Gobi-enabled chipsets was announced on March 23, 2010 however this generation consists of a wioipedia of 6 different chips which support different ranges of wireless standards and data rates. The reasoning behind the multiple chips was to address additional markets such as USB modems, e-readers, gaming devices and machine to machine commercial applications.

[7] Qualcomm also introduced software enhancements for wikipedoa Mobile Data Modem (MDM) chipsets that enabled �a common Gobi software interface ( API) across multiple hardware platforms.� [8] Products [ edit ]The main feature of the Gobi modems is their support of multiple wireless standards such as GSM and CDMA.

Newer modems also have support for 4G wireless standards such as HSPA+ and LTE, with a notable omission of WiMax. [8] [9] The extensive support of wireless standards allows consumers to choose between multiple carriers based on qualcom modem present in their device. What standard 3t modem supports and at what rates depends on the chip being used.Below is a list of Gobi-enabled modem chipsets released by Qualcomm and their features:MDM1000�: [5]� Multi-mode modem� EV-DO Rev.

A support (CDMA)� 800, 1900�MHz� HSPA support with full backward compatibility with GSM, GPRS and EDGE� 850, 1900, 2100�MHz for HSPA� 850, 900, 1800, 1900�MHz for GSM/GPRS/EDGE� Simultaneous GPS functionalityMDM2000�: [6]� All the features of the MDM1000�� Support for HSPA at 800 and 900�MHz� Improved upload speeds for HSPA� Improved GPS functionality, including support for Assisted GPSMDM6200�: [8] [10]� Single-mode modem� Only supports HSPA+ with data rates of up to 14.4 Mbit/s� GPS functionality, including support for Qualcomm 3g hsdpa wikipedia GPSMDM6600�:� Multi-mode modem� HSPA+ with data rates of up to 14.4 Mbit/s� CDMA2000� 1xEV-DO Rev.

A/Rev. B support� GPS functionality, including support for Assisted GPSMDM8200A�:� Single-mode modem� Only supports HSPA+ with data rates of up to 28 Mbit/s� GPS functionality, including support for Assisted GPSMDM8220�:� Single-mode modem� Only supports Dual-Carrier HSPA+ with data rates of up to 42 Mbit/s� GPS functionality, including support for Assisted GPSMDM9200�:� Single-mode modem� 4G(LTE) data rates of up to 100 Mbit/s with full backward compatibility to Dual-Carrier HSPA+� GPS functionality, including wikpedia for Assisted GPSMDM9600�:� Multi-mode modem� 4G (LTE) data rates of up to 100 Mbit/s with full backward compatibility to Dual-Carrier HSPA+� EV-DO Rev.

A/Rev. B support� GPS functionality, including support for Assisted GPSModel Names and Real World Names [ edit ] Gobi ModelManufacturerManufacturer NameGobi 1000SierraMC�?Gobi 1000DellDW5600Gobi 1000HPun2400Gobi 2000DellDW5620Gobi 2000SierraMC�?Gobi 2000HPun2420Gobi 3000SierraMC8355Gobi 3000DellDW5630Gobi 3000HPun2430Awards [ edit ]Mobile Innovation Awards - Mobile Computing � LAPTOP Magazine [1] See also [ edit ]� Comparison of wireless data standards� Qualcomm SnapdragonReferences [ edit ] � ^ "Verizon iPhone 4 gets torn apart, Qualcomm MDM6600 chip found inside - Engadget". Retrieved 2011-02-11.� ^ "Qualcomm Gobi 3G Chip Goes Both Ways: EV-DO or HSDPA". Retrieved 2011-02-11.� ^ "Qualcomm's dual-3G Gobi chip handles EV-DO and HSPA - Engadget".

Retrieved 2011-02-11.� ^ "HP latches onto Qualcomm's Gobi chipset". Retrieved 2011-02-11.� ^ a b "Qualcomm News and Events - Press Releases - Qualcomm Introduces Gobi Global Mobile Internet GPS Solution for Notebook Computers". Retrieved 2011-02-11.� ^ a b "Qualcomm News and Events - Press Releases - Qualcomm Introduces Second-Generation Embedded Gobi Module for Mobile Internet Access". Retrieved 2011-02-11.� ^ "Qualcomm adding the kitchen sink to Gobi, including EV-DO Rev.

A, dual-carrier HSPA+, and LTE - Engadget". Retrieved 2011-02-11.� ^ a b c "Qualcomm's Expanded Gobi Connectivity Portfolio Gains Broad Industry Support". Retrieved 2011-02-11.� ^ Matt Hamblen. "Qualcomm's new Gobi: A WiMax and Wi-Fi killer? - Computerworld". Retrieved 2011-02-11.� ^ Qualcomm (2010-03-22). "Gobi Anywhere �The World is Your HotspotTM" (PDF). Retrieved 2011-02-11.External links [ edit ]� Gobi Homepage - [2] � This page was last modified on 13 September 2016, at 18:10.� Text is available under the Creative Commons Attribution-ShareAlike License ;additional terms may apply.

By using this site, you agree hsdppa the Terms of Use and Privacy Policy. Wikipedia� is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.� Privacy policy� About Wikipedia� Disclaimers� Contact Wikipedia� Developers� Cookie statement� Mobile view�� This article's lead section may not adequately summarize key points of its contents.

Please qualcomm 3g hsdpa wikipedia expanding the lead to provide an accessible overview of all important aspects of the article.

Please discuss this issue on the article's talk page. (February 2016) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (February 2016) ( Learn how and when to remove this template message) This article may need to be rewritten entirely to comply with Wikipedia's quality standards. You can help. The discussion page may contain suggestions. (February 2016)( Learn how and when to remove 3f template message)The Universal Mobile Telecommunications System ( UMTS) is qhalcomm 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 International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to wikipsdia network operators.UMTS specifies a complete network system, which includes eikipedia radio access network ( UMTS Terrestrial Radio Access Network, or UTRAN), the core network ( Mobile Application Part, or MAP) and the authentication of users via SIM ( subscriber identity module) cards.The technology described in UMTS is sometimes also referred to as Freedom of Mobile Multimedia Access (FOMA) [1] or 3GSM.Unlike EDGE (IMT Single-Carrier, based on GSM) and CDMA2000 (IMT Multi-Carrier), UMTS requires new base stations and new frequency allocations. Contents� 1 Features� 2 Air interfaces� 2.1 W-CDMA (UTRA-FDD)� 2.1.1 Development� 2.1.2 Rationale for W-CDMA� 2.1.3 Deployment� 2.2 UTRA-TDD� 2.2.1 TD-CDMA (UTRA-TDD 3.84 Mcps High Chip Rate (HCR))� 2.2.2 TD-SCDMA (UTRA-TDD 1.28 Mcps Low Chip Rate (LCR))� wikipeedia Objectives� Technical highlights� History� Frequency bands & Deployments� 2.2.3 Unlicensed UMTS-TDD� 2.2.4 Comparison with UMTS-FDD� 2.2.5 Deployment� 2.2.6 Competing Standards� 3 Radio access network� 4 Core network� 5 Frequency bands and channel bandwidths� 5.1 UARFCN� 5.2 Spectrum allocation� 6 Interoperability and global roaming� 6.1 Handsets and modems� 7 Other competing standards� 8 Migrating from GSM/GPRS to UMTS� 9 Problems and issues� 9.1 Security issues� 10 Releases� 10.1 Release '99� 10.2 Release 4� 10.3 Release 5� 10.4 Release 6� 10.5 Release 7� 10.6 Release 8� 10.7 Release 9� 11 See also� 12 Notes� 13 References� 13.1 Citations� 13.2 Bibliography� 14 Documentation� 15 See also� 16 External linksFeatures [ edit ]UMTS supports maximum theoretical data transfer rates of 42 Mbit/s when Evolved HSPA (HSPA+) is implemented in the network.

[2] Users in deployed networks can expect a transfer rate of up to 384 kbit/s for Release '99 (R99) handsets (the original UMTS release), and 7.2�Mbit/s for High-Speed Downlink Packet Access (HSDPA) handsets in the downlink connection.

These speeds are significantly faster than the 9.6 kbit/s of a single GSM error-corrected circuit switched data channel, multiple 9.6 kbit/s channels in High-Speed Circuit-Switched Data (HSCSD) and 14.4 kbit/s for CDMAOne channels.Since 2006, UMTS networks in many countries have been or are in the process of being upgraded with High-Speed Downlink Packet Access (HSDPA), sometimes known as 3.5G.

Currently, HSDPA enables downlink transfer speeds of up to 21 Mbit/s. Work is also progressing on improving the uplink transfer speed with the High-Speed Uplink Packet Access (HSUPA). Longer term, the 3GPP Long Term Evolution (LTE) project plans to move UMTS to 4G speeds of 100 Mbit/s down and 50 Mbit/s up, using a next generation air interface technology based upon orthogonal frequency-division multiplexing.The first national consumer UMTS networks launched in 2002 with a heavy emphasis on telco-provided mobile applications such as mobile TV and video calling.

The high data speeds of UMTS are now most often utilised for Internet access: experience in Japan and elsewhere has shown that user demand for video calls is not high, and telco-provided audio/video content has declined in popularity in favour of high-speed access to the World Wide Web�either directly on a handset or connected to a computer via Wi-Fi, Bluetooth or USB.

[ citation needed] Air interfaces [ edit ] UMTS network architectureUMTS combines three different terrestrial air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs.The air interfaces are called UMTS Terrestrial Radio Access ( UTRA). [3] All air interface options are part of ITU's IMT-2000. In the currently most popular variant for cellular mobile telephones, W-CDMA (IMT Direct Spread) is used.Please note that the terms W-CDMA, TD-CDMA and TD-SCDMA are misleading.

While they suggest covering just a channel access method (namely a variant of CDMA), they are actually the common names for the whole air interface standards. [4] W-CDMA (UTRA-FDD) [ edit ] UMTS base station on the roof of a buildingW-CDMA or WCDMA ( Wideband Code Division Multiple Access), along with UMTS-FDD, UTRA-FDD, or IMT-2000 CDMA Direct Spread is an air interface standard found in 3G mobile telecommunications networks.

It supports conventional cellular voice, text and MMS services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth applications including streaming and broadband Internet access.

[5]W-CDMA uses the DS-CDMA channel access method with a pair of 5�MHz wide channels. In contrast, the competing CDMA2000 system uses one or more available 1.25�MHz channels for each direction of communication.

W-CDMA systems are widely criticized for their large spectrum usage, which delayed deployment in countries that acted relatively slowly in allocating new frequencies specifically for 3G services (such as the United States).The specific frequency bands originally defined by the UMTS standard are 1885�2025�MHz for the mobile-to-base (uplink) and 2110�2200�MHz for the base-to-mobile (downlink).

In the US, 1710�1755�MHz and 2110�2155�MHz are used instead, as the 1900�MHz band was already used. [6] While UMTS2100 is the most widely deployed UMTS band, some countries' UMTS operators use the 850�MHz and/or 1900�MHz bands (independently, meaning uplink and downlink are within the same band), notably in the US by AT&T Mobility, New Zealand by Telecom New Zealand on the XT Mobile Network and in Australia by Telstra on the Next G network. Some carriers such as T-Mobile use band numbers to identify the UMTS frequencies.

For example, Band I (2100�MHz), Band IV (1700/2100�MHz), and Band V (850�MHz).UMTS-FDD is an acronym for Universal Mobile Telecommunications System (UMTS) - frequency-division duplexing (FDD) and a 3GPP standardized version of UMTS networks that makes use of frequency-division duplexing for duplexing over an UMTS Terrestrial Radio Access ( UTRA) air interface.

[7]W-CDMA is the basis of Japan's NTT DoCoMo's Qyalcomm service and the most-commonly used member of the Universal Mobile Telecommunications System aikipedia family and sometimes used as a qualcom for UMTS. [8] It uses the DS-CDMA channel access method and the FDD duplexing method to achieve higher speeds and support more users compared to most previously used time division multiple access (TDMA) and time division duplex (TDD) schemes.While not an evolutionary upgrade on the airside, it uses the same core network as the 2G GSM networks deployed worldwide, allowing dual mode mobile operation along with GSM/ EDGE; a feature it shares with other members of the UMTS family.

Development [ edit ]In the late 1990s, W-CDMA was developed by NTT DoCoMo as the air interface for their 3G network FOMA. LaQualcomm SnapdragonProducedFrom 2008 to presentDesigned byQualcommInstruction setARMMicroarchitectureCortex-A7 / Cortex-A8 / Cortex-A53 / Cortex-A57 / Cortex-A72 / Scorpion wjkipedia Krait / KryoCores1/2/4/6/8ApplicationMobile SoCThis is a list of Qualcomm Snapdragon devices.Snapdragon is a family of mobile systems on a chip (SoC) made by Qualcomm for use in smartphones, tablets, and smartbook devices. Contents� 1 Snapdragon S1� 2 Snapdragon S2� 3 Snapdragon S3� 4 Snapdragon S4� 5 Snapdragon 200 series� 5.1 Snapdragon 200� 5.2 Snapdragon 208, 210 and 212� 6 Snapdragon 400 series� 6.1 Snapdragon 400� 6.2 Snapdragon 410 and 412� 6.3 Snapdragon 415� 6.4 Snapdragon 425� 6.5 Snapdragon 430 and 435� 7 Snapdragon 600 series� 7.1 Snapdragon 600� 7.2 Snapdragon 602A� 7.3 Snapdragon 610, 615 and 616� 7.4 Snapdragon 617 and 625� 7.5 Snapdragon qualcommm (618) and 652 (620)� 8 Snapdragon 800 series� 8.1 Snapdragon 800 and 801� 8.2 Snapdragon 805� 8.3 Snapdragon 808 and wkiipedia 8.4 Snapdragon 820 and 821� 9 Similar platforms� 10 References� 11 External linksSnapdragon S1 [ edit ] ModelnumberSemiconductortechnologyCPUinstruction setCPUCPUcacheGPUMemorytechnologyWireless radiotechnologiesSamplingavailabilityUtilizingdevicesMSM7225 [1]65�nmARMv6Up to 528 MHz ARM1116K+16K L1no Hsd;a rendered qualcomn supportGSM (GPRS/EDGE), UMTS (HSPA)2007 List� HTC Wildfire A315c, Wildfire 6225; [2] Huawei IDEOS C8150/U8150, M835, Ascend M860.MSM7227 [1]Up to 800�MHz ARM1116K+16K L1256K L2Adreno 200166�MHz LPDDR1(1.33 GB/s)GSM (GPRS/EDGE), UMTS (HSPA)2008 List� 600�MHzAlcatel OT-990; Coolpad W706, Garmin & Asus A10, M10; Gigabyte Quacomm G1305 Boston; HTC Aria, Gratia, Legend, Wildfire S; Huawei Ideos X3, Pocket WiFi S II (S41HW), Sonic (U8650); LG GT540 Optimus, Optimus Chat (L-04C), Optimus Chic, Optimus Me, Optimus One (GSM); Micromax A70; Movi M1; Nexian A890 Journey; OlivePad VT-100; Optimus Boston; Qualcokm Pixi (GSM); Samsung Galaxy Europa (i5500 Galaxy 5), Galaxy Fit, Galaxy Mini, Galaxy 551; Sony Ericsson Xperia X10 Mini, Xperia X10 Mini Pro, Xperia X8; T-Mobile myTouch 3G Slide; WellCom A88; ViewSonic ViewPad 7; ZTE Blade, Racer, Merit (990G)800�MHzCoolpad 7260; Huawei Smart Bar (S42HW); HTC ChaCha, Salsa; LG Optimus Hub, Optimus Net (P699); Motorola XT-502; Odys Space; Samsung Galaxy Ace, Galaxy Gio; ZTE Blade S, Qualcomk, SkateMSM7627 [1]GSM (GPRS/EDGE)CDMA (1? Rev.

A, 1?EV-DO Rev. A)UMTS (HSPA) List� BlackBerry Curve (8530); Coolpad 5820; Huawei Evolucion 2 CM980, Ascend II (M865C); Kyocera Zio; LG Optimus S, Optimus Q (L45C), Optimus V, Optimus Zip (L75C), VS740; Motorola Devour, ES400; Ouku Horizon P801W; Palm Pixi Plus; Samsung Galaxy Prevail, Galaxy Precedent (SCH-M828C), [3] Galaxy Y hedpa (CDMA); Unimax MaxBravo (U670C); ZTE Score x500MSM7225A45�nmARMv7Up to 800�MHz ARM Cortex-A532K+32K L1256K L2Adreno 200 3h LPDDR1(1.6 GB/s)GSM (GPRS, EDGE), W-CDMA/UMTS (HSDPA, HSUPA), MBMSQ4 2011 List� 600�MHzHTC Desire C (GSM), Explorer; Motorola Defy Mini XT320800�MHzGigabyte GSmart G1342; Huawei Ascend Y100 (U8185), Ascend Y101 (U8186), Ascend Y200 (U8655), Ascend Y201 Pro; LG Optimus L3, Optimus L3 II, [4] Optimus L5, Optimus Logic (L35G), Optimus Extreme (L40G); S-Nexian Mi320; Samsung Galaxy Discover (SCH-R740C, SGH-S730G); [5] Sony Xperia miro, Xperia tipo; ZTE Illustra (Z778G), Whirl (Z660G)MSM7625AGSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA), MBMS,CDMA2000 (1?RTT, 1?EV-DO Rel.0/Rev.A/Rev.B, 1?EV-DO MC Rev.A) List� Karbonn A5, ZTE N855D, Hisense E860Samsung Galaxy Centura (SCH-S738C), wilipedia Samsung Galaxy Discover (SCH-S735C)LG Optimus Dynamic (L38C), Huawei Ascend Y (H866C)MSM7227AUp to 1 GHz ARM Cortex-A5GSM (GPRS, EDGE), W-CDMA/UMTS (HSDPA, HSUPA), MBMS List� 800�MHzMotorola Motoluxe XT615; Nokia Lumia 510, Lumia 610; Huawei Ascend Y200; Samsung Galaxy Mini 21�GHzAcer Liquid Glow; Alcatel One Touch Fire; HTC Desire V, Desire VC; Huawei Ascend Y210(D) (U8685), Ascend G300, Inspira (H867G); LG Optimus L7, Qualfomm Motorola Defy XT XT535; Samsung Galaxy Ace Plus, Galaxy S Duos, Omnia M; Sony Xperia E, Xperia J; ZTE Blade II, Blade III, Blade hsda, Open; Mobiistar Touch S03; S-Nexian Mi430; Advan Vandroid T1AMSM7627AGSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA), MBMS,CDMA2000 (1?RTT, 1?EV-DO Rel.0/Rev.A/Rev.B, 1?EV-DO MC Rev.A) List� Hisense E910; HTC Desire VC T328d; Huawei Ascend C8812, Glory (H868C); Karbonn A5, A15; LG Optimus Dynamic II (L39C); Micromax A87, A56, A57; Motorola Defy XT (XT555C); Samsung Galaxy Young S6310/S6312; Walton Primo; ZTE Valet (Z665C)MSM7225AB [7] [8]GSM (850/900/1800/1900)3G Dual (900/2100, 850/2100) (850.1900, 900/1900), HSDPA 7.2Mbit/s List� Most Windows Phone 7.0 devices (excluding LG Optimus); Acer Stream/Liquid, neoTouch S200; Dell Streak; Fujitsu Toshiba Mobile REGZA Phone T-01C; HP Compaq AirLife 100; HTC Desire, HD2; Huawei SmaKit S7; Lenovo LePhone; LG Optimus Q, Optimus Z, Panther; Nexus One; Pantech IM-A600S, IM-A650S; Sharp Lynx (SH-10B), Lynx 3D SH-03C; Sony Ericsson Xperia X10; Toshiba Dynapocket (T-01B), TG01/TG02/TG03; xolo QC800 tabQSD8650GSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA), MBMS,CDMA2000 (1?RTT, 1? EV-DO Rel.0/Rev.A/Rev.B, 1?EV-DO MC Rev.A) List� Fujitsu F001 (FJ001); HTC Arrive, Droid Incredible, Evo 4G; Kyocera Echo, K009 (KY009); LG Apollo GW990, Fathom VS750, GW820 eXpo, GW825 IQ, Optimus 7, Quantum; NEC Casio CA007; Pantech Sirius an IS06 (PTI06); Sharp IS01 (SHI01)/IS03 (SHI03); Sony Ericsson S004 (SO004)/S005 (SO005)/S006 (SO006)/iida G11 (SOX02)/S007 (SO007), Urbano Affare (SOY05); Toshiba Dynapocket IS02 (TSI01)/K01, Regza Phone IS04 (TSI04), Regza Phone T004 (TS004), T006 (TS006), T007 (TS007), T008 (TS008), X-Ray (TSX06)Snapdragon S2 [ edit qualocmm ModelnumberSemiconductortechnologyCPUinstruction setCPUCPUcacheGPUMemorytechnologyWireless radiotechnologiesSamplingavailabilityUtilizing devicesMSM723045�nmARMv7Up to 800�MHz Scorpion32K+32K L1256K L2Adreno 205Dual-channel 333�MHz LPDDR2(5.3 GB/s) [9]GSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA, HSPA+), MBMSQ2 2010 List� Acer Liquid Metal, HP Veer, HTC Desire Z, Huawei Ideos X5 (U8800), NEC Casio Medias N-04C, Dell Smoke, Dell FlashMSM7630GSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA, HSPA+), MBMS,CDMA2000 (1?Adv, [10] 1?EV-DO Rel.0/Rev.A/Rev.B, 1?EV-DO MC Rev.A, SV-DO) List� Acer Iconia Smart, Acer Allegro, Fujitsu F-12C, HTC Desire HD, HTC Desire S, HTC Incredible Wikipeida, HTC Inspire 4G, HTC One V, HTC Radar, Huawei U9000 Ideos X6, Huawei Ideos X5 (U8800 pro), Huawei Vision, LG Optimus Ultimate (L96G), LG Eclypse, [11] LG Optimus Sol E730, Motorola Pro+, Samsung Exhibit II 4G, Sharp Galapagos 003SH/ 005SH, Sharp Aquos Phone f (SH-13C), Sharp Aquos Phone the Hybrid (007SH/007SH J), Sharp Aquos Phone the Premium (009SH), Sony Ericsson Live with Walkman, Sony Ericsson Xperia active, Sony Ericsson Xperia Arc, Sony Ericsson Xperia Acro (SO-02C), Sony Ericsson Xperia Neo, Sony Ericsson Xperia Neo V, Sony Ericsson Xperia Play (GSM), Sony Ericsson Xperia Pro, Sony Ericsson Xperia Mini, Sony Ericsson Xperia Mini Pro, Sony Ericsson Xperia ray, Sony Xperia Neo L, [12] T-Mobile myTouch 4G, ZTE Tania, ZTE qualcomm 3g hsdpa wikipedia, Pantech Vega XMSM8255TUp to 1.5�GHz Scorpion List� Alcatel OT-995, [13] BlackBerry Hsdps 9900/9930 [14] BlackBerry Torch 9860 [15] Nokia Lumia 710, Huawei U8860 Honor, [16] Nokia Lumia 800, Samsung Focus S, Samsung Galaxy S Plus, [17] Samsung Galaxy W, [18] Samsung Omnia W, Samsung Rugby Smart, [19] Sharp Aquos Phone Gsdpa, [20] Sharp Aquos Phone 006SH, Sony Ericsson Xperia arc S, [21] Fujitsu Stylistic S01, HTC Flyer, HTC Sensation XL, HTC Titan, HTC Titan II, Motorola Iron Rock XT626MSM8655Up to 1�GHz ScorpionGSM (GPRS, EDGE)W-CDMA/UMTS (HSDPA, HSUPA, HSPA+), MBMS,CDMA2000 (1?Adv, [10] 1?EV-DO Rel.0/Rev.A/Rev.B) List� Fujitsu Toshiba IS12T, Kyocera Event, Kyocera Hydro, Kyocera Rise, Kyocera Hydro EDGE, HTC Droid Incredible 2, [22] HTC Rhyme, HTC Thunderbolt, LG Revolution (VS910), LG Optimus Showtime (L86C), Motorola Triumph, Pantech Mirach IS11PT, Samsung Conquer 4G, [23] Sharp IS05 (SHI05), SLTE signal indicator in AndroidLong-Term Evolution ( LTE) is a standard for high-speed wireless communication for mobile phones and data terminals.

It is based on the GSM/ EDGE and UMTS/ HSPA network technologies, increasing the capacity and speed using a different radio interface together with core network improvements. [1] [2] The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9. Y LTE is the upgrade same for carriers with both GSM/UMTS networks and CDMA2000 networks.

The different LTE frequencies and bands used in different countries will mean that only multi-band phones will be able to use LTE in all countries where it is supported.LTE is commonly marketed as 4G LTE, but it does not meet the technical criteria of a 4G wireless service, as specified in the 3GPP Release 8 and 9 document series, for LTE Advanced. The requirements were originally set forth by the ITU-R organization in the IMT Advanced specification.

However, due to marketing pressures and the significant advancements that WiMAX, Evolved High Speed Packet Access and LTE bring to the original 3G technologies, ITU later decided that LTE together with the aforementioned technologies can be called 4G technologies. [3] The LTE Advanced standard formally satisfies the ITU-R requirements to be considered IMT-Advanced. [4] To differentiate LTE Advanced and WiMAX-Advanced from current 4G technologies, ITU has defined them as hssdpa 4G".

[5] [6] Contents� 1 Overview� 2 History� 2.1 3GPP standard development timeline� 2.2 Carrier adoption timeline� 3 LTE-TDD� 3.1 History� 4 LTE Direct� 5 Qualcmm 6 Voice calls� 6.1 Enhanced voice quality� 7 Frequency bands� 8 Patents� 9 See also� 10 References� 11 Further reading� 12 External links� 12.1 White papers and other technical informationOverview [ edit ] HTC ThunderBolt, the second commercially available LTE smartphoneLTE stands for Long Term Evolution [7] and is a registered trademark owned by ETSI (European Telecommunications Standards Institute) for the wireless data communications technology and a development of the GSM/UMTS standards.

However, other nations and companies do play an active role in the LTE project. The goal of LTE was to increase the capacity and speed of wireless data networks using new DSP (digital signal processing) techniques and modulations that were developed around the wkkipedia of the millennium. A further goal was the redesign and simplification of the network architecture to an IP-based jsdpa with significantly reduced transfer latency compared to the 3G architecture.

The LTE wireless interface is incompatible with 2G and 3G networks, so that it must be operated on a separate radio spectrum.LTE was first proposed by NTT DoCoMo of Japan in 2004, and studies on the new standard officially commenced in 2005.

[8] In May 2007, the LTE/ SAE Trial Initiative (LSTI) alliance was founded as a global collaboration between vendors and operators with the goal of verifying and promoting the new standard in order to ensure the global introduction of the technology as quickly as possible.

[9] [10] The LTE standard was finalized in December 2008, and the first publicly available LTE service was launched by TeliaSonera in Oslo and Stockholm on December 14, 2009 as a data connection with a USB modem. The LTE services were launched by major North American carriers as well, with the Samsung SCH-r900 being the world�s first LTE Mobile phone starting on September 21, 2010 [11] [12] and Samsung Galaxy Indulge being the world�s first LTE smartphone starting on February 10, 2011 [13] [14] both offered by MetroPCS and HTC ThunderBolt offered by Verizon starting on March 17 being the second LTE qualclmm to be sold commercially.

[15] [16] In Canada, Rogers Wireless was the first to launch LTE network on July 7, 2011 offering the Sierra Wireless AirCard� 313U USB mobile broadband modem, known as the "LTE Rocket� stick" then followed closely by mobile devices from both HTC and Samsung. [17] Initially, CDMA operators planned to upgrade to rival standards called UMB and WiMAX, but all the major CDMA operators (such as Verizon, Sprint and MetroPCS in the United States, Bell and Telus in Canada, au by KDDI in Japan, SK Telecom in South Korea and China Telecom/ China Unicom in China) have announced that they intend to migrate to LTE after all.

The evolution qulcomm LTE is LTE Advanced, which was standardized in March 2011. [18] Services are expected to commence in 2013. [19]The LTE specification provides downlink peak rates of 300�Mbit/s, uplink peak rates of 75�Mbit/s and QoS provisions permitting a transfer latency of less than 5 ms in the radio access network.

LTE has the ability to manage fast-moving mobiles and supports multi-cast and broadcast streams. LTE supports scalable carrier bandwidths, from 1.4 MHz to 20�MHz and supports both frequency division duplexing (FDD) and time-division duplexing (TDD). The IP-based network architecture, called the Evolved Packet Core (EPC) designed to replace the GPRS Core Network, supports seamless handovers for both voice and data to cell towers with older network technology such as GSM, UMTS qualcokm CDMA2000.

[20] The simpler architecture results in lower operating costs (for example, each E-UTRA cell will support up to four times the data and voice capacity supported by HSPA [21]). History [ edit ] 3GPP standard development timeline [ edit ]� In 2004, NTT DoCoMo of Japan proposes LTE as the international standard.

[22]� In September 2006, Siemens Networks (today Nokia Networks) showed in collaboration with Nomor Research the first live emulation of an LTE network to the media and investors. As live applications two users streaming an HDTV video in the downlink and playing an interactive game in the uplink have been demonstrated. [23]� In February 2007, Ericsson demonstrated for the first time in the world LTE with bit rates up to 144 Mbit/s [24]� In September 2007, NTT docomo demonstrated LTE data rates of 200 Mbit/s with power level below 100�mW during the test.

[25]� In November 2007, Infineon presented the world�s first RF transceiver named SMARTi LTE supporting LTE functionality in a single-chip RF silicon processed in CMOS [26] [27]� In early 2008, LTE test equipment began shipping from several vendors and, at the Mobile World Congress 2008 in Wikiedia, Ericsson demonstrated the world�s first end-to-end mobile call enabled by LTE on a small handheld device. [28] Motorola demonstrated an LTE RAN standard compliant eNodeB and LTE chipset at the same event.� At the February 2008 Mobile World Congress:� Motorola demonstrated how LTE can accelerate the delivery of personal media experience with HD video demo streaming, HD video blogging, Online gaming and VoIP over LTE running a RAN standard compliant Qualcimm network & LTE chipset.

[29]� Ericsson EMP (now ST-Ericsson) demonstrated the world�s first end-to-end LTE call on handheld [28] Ericsson demonstrated LTE FDD and TDD mode on the same base station platform.� Freescale Semiconductor demonstrated streaming HD video with peak data rates of 96 Mbit/s downlink and 86 Mbit/s uplink. [30]� NXP Semiconductors (now a part of ST-Ericsson) demonstrated a multi-mode LTE modem as the basis for a software-defined radio system for use in cellphones.

[31]� picoChip and Mimoon demonstrated a base station reference design. This runs on a common hardware platform (multi-mode / software defined radio) with their WiMAX architecture.

[32]� In April 2008, Motorola demonstrated the first EV-DO to LTE hand-off � handing over a streaming video from LTE to a commercial EV-DO network and back to LTE. [33]� In April 2008, LG Electronics and Nortel demonstrated LTE data rates of 50 Mbit/s while travelling at 110�km/h. [34]� In November 2008, Motorola demonstrated industry first over-the-air LTE session in 700�MHz spectrum.

[35]� Researchers at Nokia Siemens Networks and Heinrich Her

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