Posts Tagged ‘3g technology’
Understanding WCDMA
3G technology also comes in various forms and platforms. Understanding the major ones will help you decide which one is the right tool. You should also tell the technical details, to know if you are getting the right kind of efficiency and accessibility. Getting information from the internet other various sources will never be as convenient as fast, since 3G is the newest available. There are new developments and changes as well to get you ahead.
Knowing WCDMA or UMTS
W-CDMA wideband code-division multiple-access is among the major technologies that implement the 3G or third generation cellular systems. This is founded on the radio access technique suggested by the ETSI Alpha Group. The details and specifications were finalized in 1999. The implementation of W-CDMA is going to be a technical challenge due to the complexity and versatility. The sophistication of the of the systems of W-CDMA can be seen from various aspects.
These are namely the complexity of the overall system, computation complexity of the receiver and the complexity of ever single algorithm. W-CDMA link-level simulations or more than 10 times the compute intensive compared to 2G simulations. In the interface of W-CDMA, the different interface users can immediately transmit at varying information rates, with the data rates even varying in time. Networks of the UMTS are required to support every 2G service, plus new services and applications.
The Technical Details
As for the FDD technical summary, the frequency band will range from 1920 MHz up to 1980 MHz and 2110 MHz and 2170 MHz or frequency division duplex. The minimum frequency band needed is 2 x 5 MHz. The frequency re-use is 1. Carrier spacing is between 4.4 MHz and 5.2 MHz. The most number of voice channels on 2 x 5 MHz is 96 with a spreading factor of 256 UL and AMR or 7.95 Kbps and 98 with a spreading factor of 128 UL and AMR of 12.2 Kbps.
Other Specs
The voice coding includes AMR codecs ranging from 4.75 kHz up to 12.2 kHz, GSM EFR is at 12.2 kHz. SID is also included at 1.8 kHz. The channel coding includes convolutional coding with turbo code for high rate data. The duplexer required is 190 MHz separation with asymmetric connection supported. Tx and Rx isolation is MS:55db and BS:80dB. The Receiver is Rake, while receiver sensitivity is Node B.
More Information
Data type for the device is packet and circuit switch. Modulation is QPSK and pulse shaping is root raised cosine, rolling off at 0.22. The chip rate is 3.84 Mcps while the channel raster is 200 kHz. Maximum user data rate on the physical channel is 2.3 Mbps with a spreading factor of 4, and parallel codes of 3 DL / 6 UL, with limited interference. HSPDA will provide data speeds going as fast as 8 to 10 Mps and 20 Mbps for MIMO systems. The channel it rate is 5.67 Mbps with a frame length of 10 ms or 38400 chips.
There are 15 slots or frames, and 2560 chips. Handovers are soft and softer, plus a hard interfrequency. The power control period has a time slot with a rate of 1500 Hz. Power control step size is 0.5, 1, 1.5 and 2 dB while power control range is UL 80 dB and DL at 30 dB.
Filed under 3G Network
Tags:3g technology, 3g", access technique, alpha group, amr, cdma, cellular systems, code division multiple access, computation complexity, efr, etsi, frequency band, frequency division, information rates, interface users, level simulations, minimum frequency, spreading factor, technical challenge, time networks, Understanding WCDMA, voice channels, wideband
Plus and Minuses of 3G Technology
3G technology has taken the world by storm, with more and more users converting into the new platforms and systems that promise faster downloads, more efficient communication processes and better online experiences. You can get ahead by knowing the possible opportunities and pitfalls as well.
Some people successfully make the transition from 2G to 3G, while others just prefer more traditional methods.
Here are some starter tips.
New Technologies
3G technology is the latest one that offers faster data transfers through people’s cellular phones. 3G stands for third generation mobile telephone communication systems technology. People will be able to receive and transmit data at a rate of 2 Megabits for every second.
3G cellular phones are also capable of having conventional fax, data and voice services, plus multimedia and high-resolution video services that can be used, while you are mobile. Other mobile office services are included such as online-billing, online banking, access to the internet, online entertainment and video conferencing.
This type of mobile telephone technology significantly improves the means of communication for millions of individuals all over the globe. They can also discover new functions and uses for their cellular phones for both work and personal use.
More Benefits
One of the more known advantages of 3G technology, is that it allows your phone’s capacity to view television shows through your cellular phone. You can also experience video conversations with other individuals, regardless of the time and place, who are also investing in 3G technology.
3G phones have become one of the most powerful devices available. People get to conduct video conferencing if ever their flight gets delayed or they have other location problems. Some of the other useful applications of 3G phones include positioning services, map services and multiplayer gaming, which appeals to both teenagers and kids.
Getting More
The 3G technology allows cellular phones to be capable of work regardless of the owner’s location and the time, because of the several available applications. You can instantly simply tasks and scheduled activities, such as shopping, so that you can order items that need to be restocked. You can require and order goods over the internet, and have them ready for pickup to help you save more time and energy.
You can also balance checks and pay your bills and debts, by simply logging on to your bank account via the 3G gadgets you have. You can book dinners and hotel reservations in advance, in other cities and countries. 3G technology also gives you enough time and space to work to optimum levels. Teleconferencing is among the most excellent applications for 3G technology at work.
Changes and Enhancements
Despite the fact that 3G technology provide new changes and advanced methods in telecommunication, there are a number of things that may make the technology consequential. These new 3G cellular phones are actually a lot pricier, compared to traditional models. People can also do video conferences only with other 3G subscribers.
There are several enhancements to features and applications, which is why you should consider the kinds of work you plan to do, to determine if the technology is the best one for your needs.
Newer technologies are also in the works, such as 4G and 3.5G. You can choose to wait for these, or describe the new changes as worthy of your hard-earned cash.
Filed under 3G Network
Tags:2g, 3G cellular phones, 3g phones, 3g technology, 3g", cellular phones, communication processes, conventional fax, data transfers, efficient communication, location problems, means of communication, megabits, mobile office services, mobile telephone, Plus and Minuses of 3G Technology, positioning services, starter tips, telephone communication systems, telephone technology, video conversations, video services, voice services
iPhone 3G Information
Apple has released various popular tools and devices, particular the iPod and the Mac PC. However, the release of the iPhone has created waves of followers, hoping to get a glimpse and experience with 3G technology.
iPhone is among the first of its kind, and is also considered as one of the best gadgets ever created to meet the demands and needs of individuals from all over the globe.
Here are some more details about the iPhone.
Power-Packed Features
The iPhone is an internet-capable quad band and multimedia GSM EDGE-supported mobile phone unit created and developed by Apple Inc. The functions of the iPhone include several of the basic camera phone and multimedia player.
The device also provides internet services, which includes email, web browsing, text messaging, Visual Voicemail and local Wi-Fi connectivity. User input can be done through the multi-touch screen, complete with buttons and a virtual keyboard. Apple has filed over 200 patents associated with the technology backing the iPhone.
More Features
The iPhone boasts of having very fast 3G wireless technology, so you can enjoy talking to individuals from all over the world with crisp clear resolution on your screen. You can also download pictures, videos and other data straight from the internet and store these in the gadget. There is GPS mapping, support for enterprise features such as the new App Store and Microsoft Exchange.
Similar to the original iPhone model, the new one mixes three products in one tool. There is a widescreen iPod, a state-of-the-art phone, plus a breakthrough internet unit with high capacity HTML email and a desktop-category web browser.
iPhone Photos
You can easily take photos and send these to other people, regardless of the time and date, via the 3G technology. When taking photos, it is important that you use and apply the proper methods to get the best results. First of all, hold the camera very still with both hands, avoid wiggling or shaking until the shutter has fully closed in the viewer.
You can then compose the shot using your finger on the camera button. The shutter will let go and click one you take your finger off. Do all composing with the finger on the trigger, then lift the finger when you find the right shot in the viewer. Try not to shoot on fast-moving objects and other items in low light. The iPhone takes good clear images, but you cannot expect its photo capabilities to be exactly the same as a DSLR.
The Battery
The iPhone 3G uses an internal battery. Some individuals try to create a case and battery combination, but they will also require syncing of the unit with a PC. The iPhone still needs to be synced out because it cannot do with an external battery. The 3-in-1 external rechargeable battery is the right solution, complete with protective case. Using the item, you can take the battery and use the iPhone 3G conveniently.
Some of the included advantages are longer battery life for the iPhone 3G, access to every port on the device, the protective case function to the tool, excellent integration and control whenever syncing is done. There is also an LED power indicator. The price of an iPhone 3G will differ, depending on the source and added features.
You can get more info by visiting an authorized dealer or settling for other products over the internet.
Filed under 3G Network
Tags:3g technology, 3G wireless technology, breakthrough internet, desktop category, enterprise features, internet unit, internet-capable quad band, iphone, iPhone 3G, iPhone 3G Information, iPhone Photos, mac pc, mapping support, microsoft exchange, multimedia player, quad band, shutter, taking photos, text messaging, time and date, virtual keyboard, Visual Voicemail, voicemail, wi fi, widescreen ipod, wireless technology
3G Development
3G used to be a lot less powerful in terms of coverage and efficiency a few years back. Some of the biggest nations of the world introduced and launched initial models, then continued to develop the details to further cater to the needs of consumers all over the world. There are approximately 3 billion mobile subscribers in the world, with 3G starting to take a big piece of the pie. Here are some more information about the growth.
Spreading More
Turkey auctioned 4 IMT 2000/UMTS standard 3G licenses with 25, 35, 40 and 45 MHz top frequencies in November 2009. With the 358-million euro offer by Turkcell, it has availed of the 45 MHz band, followed by Avea and Vodafone leasing the 35 and 40 MHz respectively for 2 decades. The only one available for auction at present is the license for the 25 MHz top frequency.
A 3G video call created from Johannesburg, South Africa via the Vodacom network in November 2004 was the very first use of 3G technology in Africa. EMTEL in Mauritius launched the first commercial 3G in Africa via the W-CDMA standard. In March 2006, a 3G service was given by the emerging company Wana in North African Morocco. 3G HSDPA services was implemented by Rogers Wireless in Eastern Canada as early as 2007 via Rogers Vision. Fido Solutions and Rogers Wireless currently provides 3G service in several urban centers.
Rates of Data
The ITU has not yet given a concrete description of the data rate that consumers can get from 3G providers or equipment and tools. The consumers who were given 3G service may not clearly point out a suitable standard, indicating that the rate given are met adequately. In a commentary, it was stated that the expectation for IMT-2000 will give higher rates of transmission, having a minimum speed of 2Mbit/s and the highest at 14.4 Mbit/s for stationary consumers. 348 kbit/s can be expected in a moving vehicle.
The ITU does not specifically indicates a minimum or average rates or the modes of the interfaces that can be considered as 3G technology, so different rates are offered and sold as 3G, which are expected to meet the expectations of consumers with broadband speed. Industry sources recommend that 3G can give 384 kbit/s at or lower than pedestrian speeds, with only 128 kbit/s inside a moving vehicle. Although EDGE is included in the 3G standard, a number of phones say that 3G network availability and EDGE have separate functionality.
Standardizing the Network
The ITU or International Telecommuncation Union described the demands for 3G mobile networks, using the IMT-2000 standard. The 3GPP or 3rd Generation Partnership Project is a group that continues to work by describing a mobile system that meets the standard of IMT-2000. The system is known as UMTS or Universal Mobile Telecommunications System.
There are 6 radio interfaces in IMT-2000 namely, W-CDMA or UMTS, CDMA2000, UWC which is implemented frequently with EDGE, TD-CDMA/TD-SCDMA, DECT and Mobile WiMAX.
On Advantages
UMTS is based on layered services, apart from GSM. The top of the line is the services layer, which gives quick deployment of services, plus a centralized place. At the center is the control layer, which supports the upgrade of processes and provides the capability of the network to be allocated in a dynamic manner.
At the bottom line is the connectivity layer, wherein any type of transmission technology can be applied, with the voice traffic transfering over IP/RTP and ATM/AAL2.
Filed under 3G Network
Tags:3G Development, 3g licenses, 3g technology, 3g", avea, cdma, concrete description, eastern canada, emerging company, emtel, hsdpa, imt 2000, initial models, johannesburg south africa, kbit, mhz band, minimum speed, mobile subscribers, piece of the pie, rogers wireless, turkcell, urban centers, wana
Development from 2G to 3G
Nowadays, people all over the world can enjoy the benefits of 3G technology. Just a few years back, 2G was the norm, and before that, more “crude” processes of accessibility and the like. The networks have evolved significantly, as the largest nations of the world work nonstop to continue to deliver the best services to consumers.
You can learn more about the process by checking how 2G technology moved on to 3G.
Here are the details.
The 2G Network
Initially, 2G networks were created mainly for slow transmission and voice data. Because of the quick changes in the expectations of users, these no longer meet the requirements today in terms of wireless connection. The movement and evolution from 2G to 3G technology can be divided into several phases, namely GPRS, EDGE and pure 3G.
On GPRS
The first big step in the move to 3G happened through the launching and launching of General Packet Radio Service or GPRS. The cellular services, mixed with GPRS resulted to 2.5G. GPRS was capable of giving data rates ranging from 56 kbit/s up to a maximum of 114 kbit/s. This can be used for services like WAP or Wireless Application Protocol access, MMS or Multimedia Messaging Service, SMS or Short Message Service and internet communication services like World Wide Web access and email.
The data transfer of GPRS is usually charged for each megabyte of traffic being transferred, while the data communication via the usual circuit switching is charged by the minute of connection period, regardless of whether the consumer actually used the capability or is just in idle mode.
GPRS is a top-effort packet switched service, compared to circuit switching, where there is a given QoS or Quality of Service is certified during the connection for non-mobile users. It gives medium speed data transfer, via the use of idle Time division multiple access or TDMA channels.
Before, there used to be some believe to stretch GPRS to take over other standards. Instead, the networks are usually changed to use the standard of GSM, making GSM the new release. The original standard was conducted by the ETSI or European Telecommunications Standards Institute, but is now the 3GPP or 3rd Generation Partnership Project.
The EDGE
The GPRS networks have changed significantly to EDGE networks, through the presentation of 8PSK encoding. Enhanced information rates for EDGE or GSM Evolution, IMT Single Carrier or IMT-SC and Enhanced GPRS is a reverse-compatible digital mobile phone technology, allowing improved data transmission rates, as an extension over the standard GSM. EDGE can be counted as a 3G radio technology, involved in ITU’s 3G description, but is usually frequently referred to as 2.75G. EDGE was launched on GSM networks, starting in 2003, by Cingular now at the start in the United States.
Standardization
3GPP standardized EDGE as it belonged in the GSM group. It is considered as an upgrade that gives a potential 3-fold boost in the capacity of GPRS and GSM networks. The specification gets bigger data rates by altering to very sophisticated processes of coding, particularly 8PSK, inside the GSM timeslots. EDGE can be applied in various packet switched applications, like the internet, other multimedia and video.
Pure 3G is the introduction of UMTS technology and networks from EDGE networks. As of the present, more work on the development of the 4G is still underway.
Filed under 3G Network
Tags:2g network, 3G radio technology, 3g technology, 3g", 3GPP standardized EDGE, 4g, 5g, cellular services, circuit switching, connection period, data communication, Development from 2G to 3G, development of the 4G, general packet radio service, GPRS, internet communication services, kbit, medium speed, megabyte, mobile users, multimedia messaging service, multimedia messaging service sms, packet radio, short message service, speed data transfer, time division multiple access, UMTS technology, voice data, wireless application protocol
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