Long Term Evolution

Topics: 3GPP Long Term Evolution, Universal Mobile Telecommunications System, WiMAX Pages: 4 (1077 words) Published: July 12, 2011
As communication is a natural urge of human beings so he is constantly struggling to improve the ways of fastest communication, LTE technology is the result of such struggle. LTE is the latest standard in wireless communication. Term LTE is referred to Long Term Evolution. It is also referred to as EUTRA (Evolved UMTS Terrestrial Radio Access) or E-UTRAN (Evolved UMTS Terrestrial Radio Access Network). This is the next level of wireless communication. LTE Timeline

Objective of LTE is high-data-rate, low-latency and packet-optimized radio access technology. LTE has ambitious requirements for data rate, capacity, spectrum efficiency, and latency. In order to fulfil these requirements, LTE is based on new technical principles. The overall aim of LTE is to improve the capacity of the 3GPP system to cope with ever-increasing volumes of data traffic in the long term over 10 years. Evolution of LTE

LTE uses new multiple access schemes on the air interface: OFDMA (Orthogonal Frequency Division Multiple Access) in downlink and SC-FDMA (Single Carrier Frequency Division Multiple Access) in uplink. Furthermore, MIMO antenna schemes form an essential part of LTE. In order to simplify protocol architecture, LTE brings some major changes to the existing UMTS protocol concepts. Impact on the overall network architecture including the core network is referred to as 3GPP System Architecture Evolution (SAE). Unlike HSPA (High Speed Packet Access), which was accommodated within the Release 99 UMTS architecture, 3GPP is specifying a new Packet Core, the Evolved Packet Core (EPC) network architecture to support the E-UTRAN through a reduction in the number of network elements, simpler functionality, improved redundancy but most importantly allowing for connections and hand-over to other fixed line and wireless access technologies, giving the service providers the ability to deliver a seamless mobility experience. While 3G is defined by ITU as IMT-2000,...
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