LTE 4G-BACKBONE OF FUTURE COMMUNICATION

LTE stands for Long Term Evolution and it was started as a project in 2004 by telecommunication body known as the Third Generation Partnership Project (3GPP). SAE (System Architecture Evolution) is the corresponding evolution of the GPRS/3G packet core network evolution. The term LTE is typically used to represent both LTE and SAE.
A rapid increase of mobile data usage and emergence of new applications such as MMOG (Multimedia Online Gaming), mobile TV, Web 2.0, streaming contents have motivated the 3rd Generation Partnership Project (3GPP) to work on the Long-Term Evolution (LTE) on the way towards fourth-generation mobile. The main goal of LTE is to provide a high data rate, low latency and packet optimized radioaccess technology supporting flexible bandwidth deployments. Same time it's network architecture has been designed with the goal to support packet-switched traffic with seamless mobility and great quality of service.

FACT ABOUT LTE:

1. LTE is the successor technology not only of UMTS BUT also of CDMA 2000.
2. LTE is important because it will bring up to 50 TIMES performance improvement and much better SPECTRAL efficiency to cellular networks.
3. LTE introduced to get higher data rates, 300Mbps PEAK downlink and 75 Mbps peak uplink. In a 20MHz carrier, data rates beyond 300Mbps can be achieved UNDER very good signal conditions.
4. LTE is an ideal technology to support high date RATES for the services such as voice over IP (VOIP), streaming multimedia, videoconferencing or even A high-speed cellular modem.
5. LTE uses both Time Division Duplex (TDD) AND Frequency Division Duplex (FDD) mode. In FDD UP LINK and downlink transmission used different frequency, while in TDD both uplink and downlink use the SAME carrier and are separated in Time.
6. LTE supports flexible carrier bandwidths, from 1.4 MHZ up to 20 MHz as well as both FDD and TDD. LTE designed with a scalable carrier bandwidth from 1 MHz up to 20 MHz which bandwidth is used DEPENDS on the frequency band and the amount of SPECTRUM available with a network operator.
7. All LTE devices have to support (MIMO) Multiple INPUT Multiple Output transmissions, which allow the base station to transmit several data streams over the same carrier simultaneously.