LTE stands for Long Term Evolution, which is popularly known as 4G LTE, which is the standard used for high speed data transmission for data terminals and mobile equipment, developed by the Third Generation Partnership Project (3GPP). The first ever service of this standard was made available in Oslo and Stockholm some five years ago, through TeliaSonera, which was defined as the upgrade path for GSM/UMTS networks as well as UDMA 2000.
Though widely known by the name of 4G, LTE has gone further than the regulations prescribed by the consortium of 3GPP, but in view of the facilities offered. 3GPP decided to include this along with WIMAX, and HSPA+, in the 4G category. LTE upgrades the standards of 3G UMTS to evolve into 4G mobile technology. It addresses the problem of simplifying the technological architecture while taking over from the present UMTS and also packet-switching network, to a flat all-IP platform.
LTE’s air interface is known as E-UTRA. Some of its features include lower data transfer latencies, peak download rates up to 299.6 Mbits/s, supported by 5 terminal classes, capable of processing bandwidths of 20 MHz, which are defined by a voice-centric class.
LTE provides improved mobility support and conserves power through OFDNA and SC-FDMA for downlink and uplink respectively. It has a packet switched radio interface and is capable of supporting a minimum of 200 clients in each of its 5 MHz cells. Multicast Broadcast Single Frequency Network is supported by a LTE infrastructure, which means it can be used for transmitting signals for mobile TV, and it is recognized as a competition to TV broadcasts, which are based on DVB-H technology.
As LTE basically supports packet switching technology, whereas landline voice calls are supported by circuits, when LTE is adapted, re-engineering voice-call networks becomes necessary. Content applications services such as Google Talk and Skype can be adopted by LTE for voice transmissions.