What is 4G?

During the presentation of the new iPad this past March 7, Apple explained that the latest version of their tablet can download data much faster through the mobile network LTE technology. Where available, the new system allows you to get online with a maximum download speed of up to 42 Mbps (megabits per second). The new iPad is one of the first devices to have this feature, but its presence has caused some confusion because, unlike the 3g networks that follow standard more or less similar in much of the world, 4g systems existing far differ a lot from each other and offer different services. To do some clarity, the Wall Street Journal‘s technology columnist, Walt Mossberg, has put together a series of questions and answers, we suggest, over cellular networks for next generation data.

What is 4g?
Based on AbbreviationFinder, 4G is the fourth and latest generation to manage data over cellular networks. It’s faster and has more capacity than the 3g for now. A United Nations agency in Europe gave a technical and formal definition of 4g networks. There is also a less accurate definition and more commercial used by operators, and thus ultimately more relevant to users.

Who needs 4g?
The new system is mainly directed to those who are using mobile devices such as smartphones, tablets and laptops, and need fast connections to browse, download the app and read emails when there is a WiFi network nearby. The 4g system can offer the same domestic connection speeds.

What is the difference between 4g and LTE?
LTE is an acronym and means the terms “Long Term Evolution”: is a variety of 4g, when the more relevant and faster. According to various experts is also the 4g system that is closest to specifications and standards recommended by the United Nations.

What are the other versions of 4g?
Some operators have developed solutions related to WiMax, an alternative system to the transmission of data over the cellular network, but many experts tend to incorporate this technology into your solutions pre-4g. In many countries there are now clear rules about what can be called 4g or 3g, 4g technologies understood therefore that some operators define who they are not. In the United States, for example, T-Mobile and AT & T have defined a system 4g HSPA + (HSPA evolved), an enhanced version of 3g. The tendency of most of the operators is the gradual shift towards LTE.

How fast is 4 g?
It all depends on the type of device, from the place where you are located, from the moment you connect and by your telephone operator. Depending on these variables you can download data at speeds between three and twenty times larger than the 3g. LTE is the fastest of all, according to tests by Mossberg and guarantees between 10 and 20 megabits per second with peaks around 30 in the United States. The other 4g technologies stop much earlier and around 10 Mbps theoretical.

Domestic connections, how’s he doing LTE?
Although it is a system that is based on the LTE cellular networks, in many cases proves faster than your connection at home. Much depends on how saturated the cellular network when accessing the Internet.

Who wins the comparison between LTE and WiFi?
The WiFi has great skill and speed, but much depends on your Internet connection that is attached. In public places are often available WiFi connections with good performance, but still lower than LTE, at least in the United States and on the basis of the evidence conducted by Mossberg: 1 Mbps average against 32 Mbps offered by LTE.

LTE is faster just to download or even to upload and send files?
Both.

The current pace of LTE will decrease when there will be more people using it?
It is likely, but for now it is difficult to establish with certainty to what extent because the new system not only offers increased speed, but also increased capacity. In areas where it is already active in the United States, it is estimated that the service provided by the operator Verizon is being used by a customer in ten.

With LTE you end up downloading more data?
It is highly likely. If used to download the same things you could get on 3g, the system turns out simply faster, but speed could make users use the 4g connection to download high definition photos and video, bulky applications and so on. Operators usually require a ceiling of gigabyte per month and this may impact on the costs to customers.

LTE has an impact on voice calls?
No, not at all, because voice calls are handled with other networks in parallel. The operators are confident however move over time calls over LTE to simplify the system and make it more uniform.

And if there is no field LTE?
The new 4g compatible mobile devices operate autonomously connections to cellular networks: If LTE is not available connect to 3g networks. Decreases the speed but not the connection is lost.

LTE will work in all countries?
U.S. operators have begun to invest large resources in the development of LTE networks in North America, but equally cannot be said for telephone companies in other parts of the world. Things go slowly and up to now there have been large caution in developing a particular system, which could then not be the standard. The increasing presence of LTE networks in the United States is still causing other countries to develop and install repeaters for similar technologies.

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