Posts Tagged ‘Mobile Technology’

Working Of cell phones

Cell phones, which operate on radio frequency, cover compartmentalized cell like areas with the help of base stations. Learn more. It’s truly amazing when you think how far we have come in the technology of cellular phones.

Cell phones or cellular phones are so called as they cover compartmentalized, cell like areas. The origin of the Cell phone can be traced back to the year 1973 when Motorola came up with World`s first cellular portable telephone which was commercialised as Motorola DynaTAC 8000X.

These days, new cell phones are being added at a rapid pace. The parts of them typically consist of following: circuit board; antenna; keyboard; LCD – liquid crystal display; battery; microphone; speaker.

In recent times, they are available with a wide range of functions. To list a few functions, depending on the type of cell phone you choose: store contact information; keep track of appointments; set reminders; prepare to-do lists; send/receive e-mail; play games; send text messages (sms); access to internet; watch and enjoy TV; built-in calculator; integration with other devices like GPS receivers, MP3 players, etc.

Cell phones, operating on radio frequency, have come up with an innovative cellular approach to counter limited availability of RF spectrum. Now, several cell phone towers are used to cater to a large geographic area.

Each tower (base station), covers a circular area called a cell. A large region is split into a number of cells allowing different base stations to use the same channels/frequencies for communication. This enables thousands and thousands of mobile telephone users to share far fewer channels.

Another important aspect is that, phones need less power to transmit to reach any base station as each base station covers a smaller area. Reducing the required transmit power reduces the size of the battery and thereby the weight of the phone. This has led to miniaturization of cell phones which would not have been possible without the cellular technology.

When you use your cell phone, following things happen. First the phone locates base station having strongest signal, and requests for a channel assignment. The base station permits channel assignment and the call gets accepted. The call is then forwarded to the local telephone network if it is to a regular phone otherwise it is transmitted through the cellular network. The call is then sent to its destination through the telephone network.

When the cell phone is switched on, SID (System Identification Code) on the control channel compares it to the SID programmed into the phone. If the SIDs match, the phone understands that the cell is communicating with home system. The phone sends a registration request, along with the SID and the MTSO keeps track of the phone`s location in a database. If the SID on the control channel does not match the SID of your phone, then the phone is in roaming.

The three technologies commonly used by 2G cell phone networks for transmitting information: frequency division multiple access (FDMA); time division multiple access (TDMA); code division multiple access (CDMA).

GSM (Global System for Mobile communications) implements TDMA, to connect to the specific service providers in different countries. GSM uses subscriber identification module (SIM). SIM stores all the connection data/identification numbers needed to access a particular wireless service provider.

Standard 2.5G protocols used widely are GPRS, EDGE to name a few. Some latest 3G protocols are: Universal Mobile Telecommunication Service (UMTS); Wideband Code-Division Multiple Access (WCDMA); High-Speed Downlink Packet Access (HSDPA); Evolution Data Maximized (EVDO).

A few popular cell phone models in the market have been offered by Nokia, Ericsson, Motorola, Samsung, LG, etc. with each model with its own range of collections.The year 2008 may be a high watermark in the cell phone history with Nokia N-Gage 2, HTC Dream, Apple iPhone 2, BlackBerry Touchscreen, Sony PlayStation Phone which are expected to be launched.

This article can be accessed in portuguese from the Article section of page Cell_Phone

Roberto Sedycias works as IT consultant for PoloMercantil.

Mobile Phone Signal Booster

Now that we’re settled in the house, we’ve noticed that our Mobile Phone reception is quite poor. We both work at home quite often and use our mobiles when we do, so have been looking for a mobile phone signal booster.

First public cell

Cellular phones from the early 1990’s are considered second generation (2G) and they were able to work on mobile phone systems such as GSM, IS-136 (TDMA) and IS-95 (CDMA). Digital mobile phone networks were in use in the United States.

Verizon software to mobile phones

Jill plans to build a “mobile widgets” for future phones will likely work on any operating system, Verizon decision support in its future smartphones. Seven organizations are currently fighting for the inner track to start the mobile computer in the future.

Technorati Tags: 2g, cell phones, gsm, how does a cell phone work, mobile phone, Mobile Technology

GSM Cellular Phone – 6 Powerful Must Have Benefits GSM Cellular Phones have been around since the early 1990’s. It is only recently that consumers have reaped the benefits of this new technology. Read on to learn more.

By design, the method of transmission for a GSM Cellular Phone is through Global System for Mobile (GSM) communication. Although this system was recognized in the past, it had been first employed on a commercial basis only back in 1991. Nowadays, most of the cell phones throughout the world use the GSM.

Because GSM utilizes the TDMA digital technology, the possibility exists to have up to three voices in one slot in contrast to the analog cell phones where only one voice had the ability to go into one slot. The GSM technology can do so because it utilizes digital compression along with its in-built encryption characteristic. Therefore, even in the event that the space used is the same, there will be more usage capacity.

There are numerous benefits in employing the GSM Cellular Phone for which it owes its amazing global popularity. Some of the most prominent advantages are itemized below:

1. You have the ability to use it as a SIM card – You can get a lot of freedom with the Subscriber Identification Module or the SIM card. You can gather all kinds of information on this chip and then utilize it in whatever other mobile set as and when you change it. The other kinds of sets do not offer this type of freedom to you.

2. Surpassing quality of sound – because the GSM Cellular Phone utilizes technology that is digital in nature, it allows the filtering out of every unnecessary background noises, thus leaving a loud and clear voice transmission for outstanding communication.

3. High Security – There is integrated security for the GSM Cellular Phone that no seperate telephone system has available without specifically requesting it. Therefore, you have the complete assurance that your two way conversation is both safe as well as secure at all time, and at anyplace without costing you any extra money.

International Options

4. It makes available international roaming capabilities – the GSM Cellular Phone can quite easily link up and associate to other international digital providers and thus furnish you with the independence of utilizing your cell phone even when you travel internationally abroad. Although the calls are somewhat costly, customers are happy to utilize this facility because it is hard to communicate to everyone of their new numbers as and while they travel.

5. Extended talk time – the digital technology provides a great deal longer talk time because the battery is utilized in the best practical way. This is additionally increased by the fact one can administer more than one call at any given time.

6. GSM Cellular Phone Extra Options – this kind of cell phone has the ability to incorporate Camera, MP3, FM radio etc., which makes this phone an outstanding entertainment gadget in addition to the useful accessory that it is.

Listen to Korbin Newlyn as he shares his insights as an expert author and an avid writer in the field of electronics. If you would like to learn more go to Cellular Phone Service advice and at Alltel Cellular Phone tips.

Technorati Tags: cell phone, cellphone, gsm, Mobile Technology, sim card, tdma