Long Term Evolution or LTE is a wireless standard of the fourth generation (actually 3.9 G standard), up to 300 megabits per second higher download speeds can be achieved through LTE. The basic scheme of UMTS or Universal Mobile Telecommunication Systems is maintained in Long Term Evolution or LTE. LTE Enables rapid and cost-effective retrofitting the infrastructure of the UMTS technology (3G standard) and switching to on LTE-Advanced (4G standard) is possible. LTE-Advanced, on the other-hand is backward compatible to LTE. The used frequency ranges vary regionally and vary from approximately 800 – 2600 MHz range.
Basics on Long Term Evolution or LTE
The concept of Long Term Evolution or LTE first proposed by NTT DoCoMo of Japan in 2004, and first marketed by Nortel Networks under the name High Speed ??Packet Access (HSOPA). LTE uses Orthogonal Frequency Division Multiplexing techniques( OFDM ) and Multiple-Input/Multiple-Output-( MIMO ) Technology. The low latency of Long Term Evolution or LTE allows voice services ( VoIP ) and video calls over the common Internet protocols and the use of time-critical applications such as online games.
Even now, with UMTS are very high data rates are possible to deliver. It is expected that the demand for mobile Internet services will continue to rise. In contrast, alternative technologies WiMAX to LTE mobile providers a cost-effective evolutionary migration path for UMTS over HSDPA and HSUPA. LTE supports different bandwidths (1.4, 3, 5, 10, 15 and 20 MHz) and may be used as flexible in various schemes. OFDM enables this by increasing the number of sub-carriers, the bandwidth simply scales.
More on Long Term Evolution or LTE
As with UMTS, its protocol extensions with HSPA+ for faster transmission speeds are is also in LTE protocol, the extension is called LTE-Advanced. That is the actual 4G.
Mobile networks comprises of radio cells, in which the connections are established. If a mobile phone or other device, such as a laptop with UMTS card is activated, this device logs due to the data stored on the SIM card data over the network database to the mobile telephone network. The device first logs on to a local database, which may include a number of cells. Change of the location of the device is noticed by the software of the mobile communications device and automatically switch on to the next point.
The advantage of this approach is that it can used on the existing infrastructure, which only needs to the technical components to be added. So that means that – to put it simply – the LTE components can be installed on the existing cellular towers. Long Term Evolution or LTE is based on the currently prevailing infrastructure of the UMTS technology in order to achieve a rapid and relatively inexpensive expansion of the 3G standard for the 4G standard. One of the biggest advantages over the currently existing UMTS networks is the speed with over 100 megabits per second and significantly higher download rate. Terminals should be able to be in the LTE standard permanently connected to the Internet. The advantage here are; Depending on your wireless service provider, Multimedia Messaging Service ( MMS ), video chat, high-definition radio ( HD radio ), mobile TV, High definition TV content ( HDTV ), DVB and normal phone calls should be possible in this network.
