so the very process of disclosure is an opportunity to explore other ways to promote our events. It is pleasantly surprising the rapid enrollment we've had, considering that only we have spread through the mailing list and the corresponding elearningcolombia Facebook group. So this first part of the experiment is very successful so far. See you in a few days in the studio! 
Thanks for hosting this event! Hurry to register if it not already done so, and invite your colleagues who might be interested. 
On the other hand, many of the links, references to documents and blogs may be being lost. For that reason I want to propose some alternatives we can use to build this new community. Some may make sense and sometimes not, but the invitation is in any case that we discover what works and what things we do not. Here they are, in no particular order and represent the online presence of this new community: 
mobile telephony, also called (or rather ... bad call ...) mobile basically consists of two parts:
should also be added in the formation of this system, a third item, which consists of a series switching telephone exchanges, which enable communications between mobile terminals and traditional fixed telephone network or telephone earth "as they say in the jargon.
Before continuing, let's clarify what we mean when we said "bad cell phone call" . The use of the word cell from the fact that base stations, mentioned above, are arranged in a network, or grid if you like, forming what is known in English as cell.
This word cell in the English language like many others, has a double meaning, in Latin America has been translated incorrectly (although it was accepted socially) as cells, when in fact it had been translated correctly as cells, which is much more appropriate, referring to the geometric shape that adopts the grid-shaped arrangement of base stations.
Each cell has the size of the approximate coverage radius of each radio base, and on the perimeter intersects with the coverage of the neighboring base stations, comprising a geometrically shaped mesh, similar to that of the bees build combs.
This ensures a more uniform coverage, and when a mobile moves through the network, such as when traveling in a car, the communication is passed from one cell to another, depending on which radio base is better reception, because it is closer.
If so then the system should be called something like "cell phone" (which sounds ugly ...) , not cell as has been wrongly imposed.
is common in the United States relating to mobile phones as "cell phone" , while Europe is more common in the expression of "mobile phone" . Once this
philological clarification [6] , we continue with our description of the system.
There are basically three types of mobile telephone networks are divided into generations:
First Generation or 1G
In the first generation were framed analog technologies, the main and oldest protocol
It is noteworthy that on this system can only provide the voice telephony service, and also by the fact that the analogue, plays an important bandwidth, wasting the use of radio spectrum.
In most countries stopped working and 1G networks several years ago. Only in America still work a standard called 1G AMPS (Advanced Mobile Phone Service) Advanced Mobile Phone Service , which incorporates some services additional.
The second generation or 2G
If 1G was analog in 2G basically talked digital technologies
In the United States, with the idea optimize the service of his predecessor analog appeared standard D-AMPS Digital AMPS or and later, early in the decade of the '90s came a new digital standard called CDMA (Code Division Multiple Access) for Multiple Access Code Division . Simultaneously
appeared a new standard, which originated in Europe, but was imposed on the rest of the world and sought to unify the worldwide compatibility of technology and 2G called GSM (Global System for Mobile communications), Global Communications mobile.
This second generation is characterized by:
In Argentina, the local providers began operation 2G technology with TDMA and was then progressively replaced by GSM . TDMA networks will be disabled by the end of this year.
3G Third Generation
The ITU (International Telecommunication Union) , or in English: International Telecommunication Union ITU in a series of internationally agreed guidelines established what should be future mobile telephony. The specification of the requirements of the cell to the next generation, for providing data and multimedia services at high speed, are contained in a standard called IMT-2000 (International Mobile Telecommunication-2000) in English: International Mobile Telecommunications System-2000 , and that is what will be the 3 rd Generation .
So basically, IMT-2000 is a standard mobile phone ITU for systems of 3 rd Generation that provide wireless access the global telecommunications infrastructure, through satellite and terrestrial systems, serving fixed and mobile users in public and private networks in XXI century, and it establishes the following requirements:
systems 3 rd Generation , además deberán proveer soporte para aplicaciones como:
As expected, there are already several standards of 3G technologies that are being established with the criteria adopted by the ITU . We address the two main.
On the one hand, the European Union proposed rule UMTS (Universal Mobile telecommucation System) technology-based W-CDMA (W the is Wideband or Banda Ancha ) which is the evolution of systems GSM 2G networks , and United States, meanwhile working on the project Cdma-2000 evolving from 2G systems TDMA technology .
As we said there are other minor protocols, of which need not concern us, not what is necessary to further complicate this scenario.
But if you thought you had understood everything, think again. I must say that is not the end all, because the hop Generation 2 the 3 rd not going to be a single step, but will appear evolutions of 2G systems progressively 3G to reach , in what has been termed 2.5 G and 2.75 G , ie a kind of intermediate generations, incorporating some of the improvements and new technologies that correspond to the 3 rd generation.
intermediate Generations
On the side of GSM system which, as we said is 2G, and there is a development called GPRS (General Packet Radio Service) service General Packet Radio , considered 2.5 G, with an average transfer speed of 38 Kbps data and EDGE (Enhanced Data rates for GSM Evolution of) Enhanced Data Rates , which improves the prior art, considered by some as 2.75 G, with an average speed of 140 Kbps, until you reach the 3 rd Generation with UMTS (W-CDMA) as stated that should reach 2 Mbps
On the other hand, CDMA-2000 that another technology is the 3 rd Generation before its final implementation, through several intermediate stages are called: Cdma One/IS-95-A speeds up to 14.4 Kbps, Cdma One/IS-95-B that provides data rates up to 115 Kbps, CDMA-2000 Phase I with a data transmission capacity of over 300 Kbps, up to Cdma-2000 Phase II with a speed of 2 Mbps data transfer in 3G .
The next step towards the 4 th Generation:
Some are already talking about future developments of 3G in what is already leading the way as 3.5G, which is considered over prior before 4 th Generation (4G) , the future integration of networks.
The evolution continues and systems based on CDMA 1x EV (EV is Evolution ) to save bandwidth on the same technology in its previous version, and have two variants with different focus, both very fast: the first call CDMA 1x EV-DO ( DO corresponds to optimized Data) offers data speeds of 2.4 Mbps peak, and the second, called CDMA 1x EV-DV (DV stands for Data / Voice ) focuses on the functions of voice and data in real time as well as performance improvement for more efficient voice and data at speeds of 3.1 Mbps
Meanwhile technology HSDPA (High Speed \u200b\u200bDownlink Packet Access) (Access high speed downlink or downstream) is the optimization technology 3 rd generation UMTS / WCDMA and promises to significantly improve the maximum data transfer rates up to 14 Mbps
yet there is no definition the 4G, but there is talk that is based entirely on IP (Internet Protocol) integrating with Internet technology , combining it with other applications and technologies such as Wi-Fi and WiMAX in line with the trend of technological convergence that we are witnessing last decade.
3G in Argentina
® Personal, the mobile phone company Telecom Argentina Group ®, presented to the middle of this year, the first mobile telephone service in Argentina 3G under the standard HSDPA .
The new service will allow, among other things, make video calls, download songs or videos in seconds, wireless internet access at a rate 10 times higher, and even watch TV on their phones.
While the service is currently available in a limited area within Capital Federal, the company promised that by December 2007, the service will initially be available in the entire Federal Capital, Greater Buenos Aires, Rosario and Cordoba, with the intention of going progressively extending to the rest of the country.
Meanwhile, the company Movistar ®, which belongs to Telefónica de Argentina ®, launched 3.5G services "Mobile Broadband." For now, Movistar ® only sells the equipment Samsung ® A706 as its first UMTS phone .
When the team finds no sign UMTS available in this technology will automatically download to EDGE and GPRS then, to use data services, but at lower speeds.
® Movistar network has 3 rd Generation with the widest coverage of the country, covering more than 70 neighborhoods and towns in Capital Federal and Gran Buenos Aires.
Soon, the network will extend to the rest of AMBA (Buenos Aires Metropolitan Area) and the cities of Mendoza, Cordoba and Rosario, among others.
Throughout 2007, the company will invest 750 million pesos, including the deployment of new 3G network .
Conclusions
The Generation 1 (1G) of analog technology and 2 nd Generation (2G) of digital technology, mobile communication systems were primarily intended to support voice communications, and although they can be used to transmit data at low speed, do not meet the requirements of transmitting large volumes of information at high speeds necessary for applications such as videoconferencing, Internet, mail management and multimedia video and audio.
Moreover, there is a need to provide international roaming capabilities to users mobile phones currently lose connection or have to use complicated procedures when traveling to other countries because of the intricate maze of mobile standards in use by different countries.
The 3 rd Generation (3G) promises to be the answer to these problems by offering voice, data and video at high speeds, and perhaps the gift of ubiquity in terms of communications
m Ovile.On the other hand, already envisions the paradigm of a 4 th Generation (4G) that promises full integration with the IP technology and convergence fixed-mobile and other wireless technologies.
I hope I have been clear in the explanation, although the issue is very thorny. Anyway, if something is not understood can send an SMS and explain it again.
- A SM quee ...???
- Nothing ... nothing ... just contact me on my cell phone ....
Prof. Eduardo Esarey
Trademarks
® HP ®, iPaq ®, Personal ®, ® Telecom Argentina, Movistar ®, Telefonica de Argentina ®, Samsung ®, and any other brand and / or logos mentioned or displayed in this work are Trademarks ® of their respective owners or their legal representative, although not in all cases accompanied by the symbol "®" that identifies it as such, and are only ctadas or shown for the purpose of illustrating the subject matter, not involving any liability for companies or their owners or representatives.
The data shown correspond to information published by the companies themselves and do not imply any commitment on their part, are not responsible for the accuracy thereof.
Copyright © 2007 by Eduardo Esarey
Published and edited by the author
The opinions expressed herein are those of the author and are not given or shared by companies, associations or entities mentioned herein.
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Esarey, Eduardo - GPR quee ...? The confusing jargon mobile - Buenos Aires, 2007
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[1] iPaq is a PDA (Personal Digital Assistant) manufactured by HP ®, particularly this model incorporates a smartphone (smart phone) technology GPRS (General Packet Radio Service).
[2] An acronym - according to the dictionary, can be an acronym or initials or merger of parts of several words that are read as one word with meaning.
[3] Jargon refers to the special use of technical terminology used by a particular group of people, or by extension any terms of their own language particularly incomprehensible to other groups, which will not be, unless in exceptional cases registered in a dictionary.
[4] GSM (Global System for Mobile Communications), Global System for Mobile communications
[5] A SIM (Subscriber Identity Module) Subscriber Identity Module , is a smart card detachable - also known as chips - used in mobile phones, which securely stores the service key used to identify subscriber to the network, so it is possible to change the line from one terminal to another by simply changing the card. The use of these SIM cards is mandatory in the GSM networks.
[6] Philology (Latin Philologie and this φιλολογία Greek philology, "love or interest to the words") is the science that deals with written texts through which to reconstruct as faithfully as possible, culture giving rise to these texts and behind them.
[7] In telecommunications, a protocol is a convention, standard, or agreement between parties that governs the connection, communication and data transfer between two systems. This is a set of rules that specify the data exchange and orders governing and synchronizing communication.
[8] say that a digital signal when the magnitudes of the same are represented by discrete values \u200b\u200brather than continuous variables. For example, the light switch can only take two values \u200b\u200bor states: open or closed or the same light: on or off. Digital systems use logic of two states represented by two voltage levels, one high (H) and a low (L) (High and Low, respectively, in English). By abstraction, these states are replaced by zeros and ones, for better understanding, configuring a language that is called "Binary" referring to these two values.
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