technology technologytutorialstutorials tutorials tutorials tutorials tutorialstutorials tutorialstechnologytechnologytechnologiestechnologiestechnologiestechnologies

news news news news news newsnews newsnews news

What is LTE Technology

By Harry Noris


A great many people are curious to know what is LTE. This emerging technology is formally known as 3GPP Long Term Evolution for Universal Mobile Telecommunications System (3GPP UMT LTE). The wireless broadband technology is designed to allow roaming internet access for handheld devices, such as mobile phones, tablets and laptops. It has been developed with a number of advantages over the former cell communication standards. The forum accountable for its evolvement and standardisation is the Third Generation (3G) Partnership Project.

The 3GPP was implemented during December of 1998. Its contributors belong to worldwide based telecommunications companies which are known as the Organisational Partners. The initial remit of the 3GPP was to evolve 3G mobile phone systems which were universally suitable. Since its launch, the scope of its commitments have grown.

Currently, the 3GPP is accountable for maintaining and developing three main technological sectors. Among them are the GSM (Global Systems for Mobile Communications), which contains the development of radio access technologies. It is also accountable for the evolved 3G and beyond mobile networks which are based upon the 3GPP core systems. The group also looks after evolved IMS (IP Multimedia Subsystems) which are access-independent.

The LTE technology can be deployed simply and can provide fast data rates with low latencies across very long distances. Known as 4G (fourth generation), it is better over 3G systems. For example, initial results show the 4G network can easily attain data download speeds of almost 16 Mbps, compared to just over 1 Mbps for 3G connections. The average upload speed for the 4G system is about 1.5 Mbps, compared with 0.7 Mbps for the 3G.

LTE networks are much easier to deploy than its predecessors. Its network architecture is much simpler because it is only a network that is packet switched. The system does not have the ability to handle text messages and voice calls natively. Those types of services are mainly controlled by networks which are circuit-switched, such as CDMA (Code Division Multiple Access) and GSM.

The Simplified Architecture Evolution (SAE) of the LTE is basically a simpler kind of the architecture which is currently used by the Universal Mobile Telecommunications Systems (UMTS). The UMTS dictates a comprehensive network system which includes the Universal Terrestrial Radio Access Network (UTRAN), along with the core Mobile Application Part (MAP) network. It also validates users through their Subscriber Identity Module (SIM) cards.

The innovative 4G system is dependent upon two kinds of radio links. The downlink travels from the tower to the device, and the uplink travels from the device to the tower. Because two different forms of interfaces are utilised, wireless communications in both directions are optimised.

The downlink technology is considerably more advanced than both the CDMA and the TDMA (Time Division Multiple Access), that have been used since 1990. The newly developed radio interface is known as the Orthogonal Frequency Division Multiple Access (OFDMA). It orders that multiple in-multiple out (MIMO) technology is used. That means a device has several connections to each cell, which improves the stability of each connection and lessens its dormancy dramatically.

For the uplinks, a scheme known as DFTS-OFDMA (Discrete Fourier Transform Spread, Orthogonal Frequency Division, Multiple Access) is utilised. It produces a superior Single Carrier Frequency (SC-FDMA) signal. Among other things, it has a greater power ratio for uplinking.

There are two subcategories within the LTE technology: the TDD (Time Division), and the FDD (Frequency Division. The most frequent variation is the FDD. It depends on different frequencies for uplinks and downlinks in the form of band pairs. As a result, each band supported by a phone consists of two separate frequency ranges. The TDD variation depends upon a single frequency range within a band. This band is divided into pieces in order to assist both the transmission and reception of signals in its single frequency range.

Wimax is an older technology that relies upon underlying wireless (wi-fi) networks. By contrast, within the UK, LTE is based on the same type of technology that is presently utilised by the country's 3G network. For this explanation, the UK plans to use the 4G LTE technology instead of Wimax.

To comprehend what is LTE may assist consumers make informed purchasing choices. Selecting new devices that support 4G networks are wise decisions. This technology is envisaged to command worldwide telecommunications for many years.




About the Author:



No comments:

Post a Comment

blogger