By Christopher Cox

Following on from the profitable first version (March 2012), this publication offers a transparent rationalization of what LTE does and the way it really works. The content material is expressed at a platforms point, delivering readers the chance to know the foremost elements that make LTE the new subject among owners and operators around the globe. The publication assumes not more than a easy wisdom of cellular telecommunication platforms, and the reader isn't really anticipated to have any past wisdom of the complicated mathematical operations that underpin LTE.

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Extra info for An Introduction to LTE (2nd Edition)

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The General Packet Radio Service (GPRS) incorporated these techniques into GSM, while IS-95 was developed into a system known as IS-95B. At the same time, the data rates available over the internet were progressively increasing. To mirror this, designers first improved the performance of 2G systems using techniques such as Enhanced Data Rates for GSM Evolution (EDGE) and then introduced more powerful third generation (3G) systems in the years after 2000. 3G systems use different techniques for radio transmission and reception from their 2G predecessors, which increases the peak data rates that they can handle and which makes still more efficient use of the available radio spectrum.

Thus a second driver is the wish to reduce the end-to-end delay, or latency, in the network. Thirdly, the specifications for UMTS and GSM have become increasingly complex over the years, due to the need to add new features to the system while maintaining backwards compatibility with earlier devices. A fresh start aids the task of the designers, by letting them improve the performance of the system without the need to support legacy devices. 1 From UMTS to LTE High-Level Architecture of LTE In 2004, 3GPP began a study into the long term evolution of UMTS.

Several specifications are relevant to this chapter. 300 [2] are stage 2 specifications that include descriptions of the system architecture, while the relevant stage 3 specifications [3, 4] contain the architectural details. We will also note some other important specifications as we go along. 1 reviews the high-level architecture of the evolved packet system (EPS). There are three main components, namely the user equipment (UE), the evolved UMTS terrestrial radio access network (E-UTRAN) and the evolved packet core (EPC).

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