Mobile telephony.

Mobile telephony, also called cellular basically consists of two parts: a communications network (or mobile network) and terminals (or phones) that allow access to that network.

Mobile or cellular phone the mobile phone is an electronic device that allows wireless access to the cellular network or mobile. Cell is called in most Latin American countries because the service operates through a network of cells, where each antenna signal repeater is a cell, although there are satellite mobile telephone networks. Its main feature is its portability, which allows you to communicate from almost anywhere. The main function is voice communication such as telephone.

From the century, mobile phones have acquired features that go far beyond simply just call or send text messages, it could be said to be unified (not replaced) with various devices such as PDA, camera , electronic calendar, alarm clock, calculator, micro-projector, GPS or multimedia player and can perform many actions on a small portable device that takes virtually everyone in developed countries. This type of evolution of the mobile phone is called smartphone.

The first record is about the mobile phone company Motorola DynaTAC 8000X with your model. The model was designed by engineer Rudy Krolopp Motorola in 1983. The model weighed just under a kilo and was worth nearly U.S. $ 4000. Krolopp then the team will incorporate research and development led by Martin Cooper Motorola. Both Cooper and Krolopp appear as owners of the original patent. From the DynaTAC 8000X, Motorola would develop new models like the Motorola MicroTAC, launched in 1989 and the Motorola StarTAC, released in 1996 to market.

Currently have major mobile touch phones that follow the wake of the iPhone.

Operation

Telephone communication is made possible by the interconnection between mobile stations and public. According to the bands or frequencies which operates the mobile, can operate in one part or another of the world. Mobile telephony is a combination of a network of transmitting stations, receiving stations (repeaters, base stations or BTS) and a series of telephone switching 1st and 5th level (MSC and BSC, respectively), which enables communication between portable telephone terminals (mobile phones) or between mobile terminals and fixed network phones traditional.

In operation the mobile phone communicates with a base station, and as you move, the computer systems that manage the network are changing the call to the next base station, transparently to the user. That's why it is said that the base stations form a network of cells, which honeycomb, each base station serving the mobile devices that are in his cell.

 

Technological evolution and convergence

Evolution of mobile phone users according to the standard they use.

Main article: Universal Multimedia Access

The evolution of mobile phones has reduced its size and weight, from the Motorola DynaTAC, the first mobile phone in 1983 that weighed 800 grams, the current more compact and higher performance of service. The development of smaller batteries and longer lasting, sharper screens and colors, incorporating more user-friendly software, make the phone a very appreciated in modern life.

The advance of technology has made these devices incorporate features that not long ago seemed futuristic such as games, MP3 music playback and other formats, email, SMS, PDA PDA, digital photography and digital video, video calling, web browsing , GPS, and even digital TV. Mobile phone companies are already thinking about new applications for this little device that accompanies us everywhere. Some of these ideas are: medium of exchange, people locator and identifier.