By Christopher Cox

ISBN-10: 1118818032

ISBN-13: 9781118818039

Following on from the profitable first variation (March 2012), this booklet offers 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 main elements that make LTE the recent subject among proprietors and operators around the globe. The booklet assumes not more than a easy wisdom of cellular telecommunication structures, and the reader isn't really anticipated to have any earlier wisdom of the complicated mathematical operations that underpin LTE.

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Info 1 Introduction Our first chapter puts LTE into its historical context, and lays out its requirements and key technical features. We begin by reviewing the architectures of UMTS and GSM, and by introducing some of the terminology that the two systems use. We then summarize the history of mobile telecommunication systems, discuss the issues that have driven the development of LTE and show how UMTS has evolved first into LTE and then into an enhanced version known as LTE-Advanced. The chapter closes by reviewing the standardization process for LTE.

Within each release, the specifications progress through a number of different versions. New functionality can be added to successive versions until the date when the release is frozen, after which the only changes involve refinement of the technical details, corrections and clarifications. 4 lists the releases that 3GPP have used since the introduction of UMTS, together with the most important features of each release. Note that the numbering scheme was changed after Release 99, so that later releases are numbered from 4 through to 12.

The user datagram protocol (UDP) sends the packet without any re-transmission and is suitable for data such as real time voice or video for which timely arrival is more important. In the network layer, the internet protocol (IP) sends packets on the correct route from source to destination, using the IP address of the destination device. The process is handled by the intervening routers, which inspect the destination IP addresses by implementing just the lowest three layers of the protocol stack.

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