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What is LTE | What does LTE mean


This tutorial section on LTE basics covers following sub topics:
Main page  features  terminologies  Frame  TDD FDD  Channel types  PHY  stack  throughput  VoLTE  CA   cell search  network entry  Timers  PSS vs SSS  Security   LTE Bands  EARFCN  Hotspot  router 


LTE stands for Long Term Evolution. The technology designed and developed by 3GPP as air interface for cellular mobile communication systems. It is used to increase the capacity and data transfer speed of mobile telephone networks used mainly for data communication.LTE is marketed as 4G technology. For current release of LTE specifications, one can visit 3GPP site. One can refer list of 3GPP reference documents. LTE Advanced is the latest enhancement to LTE technology to further increase the data rate and coverage limit. Refer LTE vs LTE Advanced to know features of both the technologies.

Though LTE was designed for high speed broadband data communication, voice also can be supported using VOIP(Voice over IP) protocols or using other legacy system fall-back.

lte_system

source of figure: wikimedia commons

As mentioned in the diagram above LTE system composed of two main parts. User device is referred as UE i.e. User Equipment and Base station is known as eNB. eNB is connected to internet back bone via SGW(serving gateway) or MME(Mobility Management Entity). Refer LTE tutorial which explains system architecture mentioning connectivity between LTE system components.

Following are the silent parameters of the LTE system:
• LTE uses OFDMA in the downlink and SC-FDMA in the uplink, refer SC-FDMA vs OFDMA.
• It supports two types of frame structures as per FDD and TDD topologies, refer FDD LTE vs TDD LTE.
• The resource allocation in LTE is as based on resource block concept defined. Refer LTE Terminology.
• LTE supports various frequency bands in both TDD(Band 33 to 43) and FDD(Band 1 to 25).

Similarities and difference of LTE with other wireless standards

LTE is somewhat similar to HSPA and its downlink access technique is similar to mobile wimax i.e. OFDMA. Refer following links LTE vs WiMAX, LTE vs GSM and LTE vs UMTS which compares LTE with WiMAX, GSM and UMTS technologies respectively.

This page just covers what does lte stand for or what is LTE technology is all about. For further and detailed study one can refer lte related links provided on this page.

               

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