An Introduction to LTE (2nd Edition) by Christopher Cox

By Christopher Cox

Following on from the winning first version (March 2012), this booklet supplies a transparent clarification of what LTE does and the way it really works. The content material is expressed at a platforms point, providing readers the chance to understand the most important components that make LTE the new subject among owners and operators around the globe. The booklet assumes not more than a simple wisdom of cellular telecommunication platforms, and the reader isn't anticipated to have any prior wisdom of the advanced mathematical operations that underpin LTE.

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The circuit switched (CS) domain transports phone calls across the geographical region that the network operator is covering, in the same way as a traditional fixed-line telecommunication system. It communicates with the public switched telephone network (PSTN) so that users can make calls to land lines and with the circuit switched domains of other network operators. The packet switched (PS) domain transports data streams, such as web pages and emails, between the user and external packet data networks (PDNs) such as the internet.

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. The aim was to keep 3GPP’s mobile communication systems competitive over timescales of 10 years and beyond, by delivering the high data rates and low latencies that future users would require.

Org/specs/latest/ (accessed 15 October 2013). 22. org/Information/WORK_PLAN/ Description_Releases/ (accessed 15 October 2013). info 2 System Architecture Evolution This chapter covers the high-level architecture of LTE. We begin by describing the hardware components in an LTE network and by reviewing the software protocols that those components use to communicate. We then look in more detail at the techniques used for data transport in LTE before discussing the state diagrams and the use of radio spectrum.

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