📞 LTE phone: what it is, what features

Why do I need LTE

Sooner or later, any technology rests in its natural ceiling that starts to limit the ability of the current algorithms or approaches to implementation. It constantly happens, for example, with technical processes in processors or Internet bandwidth.

At some point the capacity of existing communication channels transmitted over the mobile, is no longer enough. It took a whole new algorithm that could cover these needs. And appeared LTE. How, indeed, before that there was 3G and, before him, many other standards.

The principle of operation of the standard and its features

Initially, LTE was developed as a natural extension of 3G. The first few releases did not meet the requirements of fourth generation networks, only 10 release - LTE Advanced entered on to 4G parameters. Technically standard is an analog 3G. Even the base stations can be used are the same. Signal range depends on the radiation power and is not limited in theory.

The data rate depends on the distance from the base station and the frequency at which the standard works. For example, for the rate of 1 Mbit / s, at a frequency of 2600 MHz, the distance can be up to 3.2 km, and 450 MHz - is 19.7 km. 3GPP consortium responsible for developing the standard, defined for it to work about 30 frequencies. However, in Europe and Russia "settled down" in all 3 main: 800, 1.8 and 2.5 MHz. Naturally, all these technical data of little interest to users. The most important for their data transmission speed is considered to be a parameter. In LTE networks it can reach 326 Mbit / s when loading and 172 Mbit / s - the recoil. Naturally, this parameter depends on the distance from the base station, interference, and other factors.

Communication modes TDD and FDD

These two abbreviations signify data transfer method. Time Division Duplex and Frequency Division Duplex. TDD divides the incoming and outgoing signal time delay. That is, using the same frequency at which a certain period of time changing signal type - incoming / outgoing.

FDD uses for each type of different frequencies of signal - included one coming on the other. In theory, FDD must act more effectively, because there is no natural time delays and the signal goes away and comes immediately to different frequencies. However, in most cases, incoming traffic is several times larger than the outgoing. This means that one of the frequencies most of the time will be idle waiting for data, while entering the frequency will work for wear. TDD uses the channel more uniformly. This mode gives both types of work time signal. In general, the effectiveness of a particular approach, ultimately, depends on various external factors, although FDD popularity is much higher in the world. Some mobile operators and does use both types, providing smartphone client to select the most effective method. One of the first domestic mobile operators, which combined the two methods was the MTS.

LTE coverage in the world and the Russian Federation

The world quite well "covered» LTE networks. Technological leaders - South Korea, China, Japan and the United States is almost entirely provided by the standard, even in the most remote areas. Europe is lagging behind a little from them.

In Russia there are still places that can only be reached unless the bear. However, communication is needed and there. The only obstacle - the cost of implementation. It does not always correlate with the excuse of the network in these remote places, as using them will be 2 persons per 1 hectare. It is worth considering, and the ratio of mobile operators to introduce new technologies. Someone comes up with the progress and respond quickly, and someone a little late and not in a hurry to put their rigs. For example, here is how the card cover 4G networks in MegaFon.

The different phones that support LTE

Given the fact that the first phone to support LTE was released back in 2010, we can safely say that almost any modern gadget supports a standard "out of the box." The only exceptions are some plates and "babushkofonov", which limit - 3G.

So, when buying a smartphone in the specifications, in the "communication standards" section, 9 times out of 10 will be LTE acronym.

Comparison of the LTE with 3G

In equal conditions - signal quality, distance from the base station and the channel utilization, LTE largely exceeds 3G. Improved algorithms allow a short period of time to download and process large amounts of data. This, in turn, also affects the length of battery life. Practice shows that LTE performance is also influenced by the correct network configuration operators and coverage. For example, in remote locations, where the LTE signal is very weak, a smart phone, to maintain the signal will consume significant battery power capacity. And during automatic switching from LTE to available network user will notice a change in transmission rate. LTE - this is one of those technologies, the full development of which is necessary to wait a little longer. Operators gradually cover all large areas, pose new base stations, unloading the old, using new algorithms, and so on. D. All this invariably leads to improved communication stability and data transfer speed in it. You need only a little time.