Many people are curious to know what is LTE. This growing technology is officially called 3GPP Long Term Evolution for Universal Mobile Telecommunications System (3GPP UMT LTE). The wifi broadband technology is structured to permit roaming internet access for handheld devices, such as mobile phones, tablets and laptops. It has been devised with a number of improvements over the previous mobile communication standards. The forum accountable for its development and standardisation is the Third Generation (3G) Partnership Project.
The 3GPP was set up during December of 1998. Its contributors belong to internationally based telecommunications companies which are known as the Organisational Partners. The first scope of the 3GPP was to evolve 3G mobile phone systems which were globally relevant. Since its inception, the scope of its commitments have expanded.
At the present time, the 3GPP is responsible for developing and maintaining 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 responsible for the evolved 3G and beyond mobile networks which are based upon the 3GPP core systems. The group also supports evolved IMS (IP Multimedia Subsystems) which are access-independent.
The LTE technology can be put to use easily and can provide fast data rates with low latencies across great distances. Known as 4G (fourth generation), it is superior over 3G systems. For example, preliminary results show the 4G network can easily reach data download speeds of nearly 16 Mbps, compared to just over 1 Mbps for 3G connections. The mean upload speed for the 4G system is about 1.5 Mbps, compared with 0.7 Mbps for the 3G.
LTE networks are much simpler to make use of than its predecessors. Its network architecture is much easier because it is merely a network that is packet switched. The system does not have the capacity to control SMS and voice calls natively. Those kinds of services are mainly handled by networks which are circuit-switched, such as GSM and CDMA (Code Division Multiple Access).
The Simplified Architecture Evolution (SAE) of the LTE is basically a simpler version of the architecture which is presently utilised by the Universal Mobile Telecommunications Systems (UMTS). The UMTS defines a comprehensive network system which encompasses the Universal Terrestrial Radio Access Network (UTRAN), along with the core Mobile Application Part (MAP) network. It also certifies users through their Subscriber Identity Module (SIM) cards.
The recent 4G system is reliant upon two types of radio links. The downlink travels from the tower to the device, and the uplink travels from the device to the tower. Since two separate types of interfaces are used, 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), which have been used since 1990. The recently developed radio interface is known as the Orthogonal Frequency Division Multiple Access (OFDMA). It mandates that multiple in-multiple out (MIMO) technology is utilised. That means a device has several connections to each cell, which improves the stability of each connection and reduces its dormancy tremendously.
For the uplinks, a project known as DFTS-OFDMA (Discrete Fourier Transform Spread, Orthogonal Frequency Division, Multiple Access) is used. It generates a superior Single Carrier Frequency (SC-FDMA) signal. Among other elements, 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 more frequent variation is the FDD. It depends on separate frequencies for uplinks and downlinks in the form of band pairs. As a consequence, each band supported by a phone comprises of two different frequency ranges. The TDD variation depends upon a single frequency range inside a band. This band is divided into segments in order to assist both the reception and transmission of signals in its single frequency range.
Wimax is an older technology that relies on underlying wireless (wi-fi) networks. By contrast, in the UK, LTE is based upon the same type of technology which is currently used by the country's 3G network. For that explanation, the UK plans to utilise the 4G LTE technology as opposed to Wimax.
To comprehend what is LTE can assist consumers make educated purchasing choices. Choosing new devices that support 4G networks are educated decisions. This technology is expected to dominate global telecommunications for many years.
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