By Christopher Cox
Following on from the profitable first variation (March 2012), this e-book supplies 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 ebook 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.
This moment variation introduces new fabric for the present country of the undefined, similar to the hot positive aspects of LTE in Releases eleven and 12, particularly coordinated multipoint transmission and proximity companies; the most brief- and long term strategies for LTE voice calls, particularly circuit switched fallback and the IP multimedia subsystem; and the evolution and present nation of the LTE industry. It additionally extends a number of the fabric from the 1st version, akin to inter-operation with different applied sciences akin to GSM, UMTS, instant neighborhood quarter networks and cdma2000; extra beneficial properties of LTE complicated, particularly heterogeneous networks and site visitors offloading; facts delivery within the developed packet center; insurance and potential estimation for LTE; and a extra rigorous remedy of modulation, demodulation and OFDMA. the writer breaks down the method into logical blocks, via firstly introducing the structure of LTE, explaining the
techniques used for radio transmission and reception and the general operation of the approach, and concluding with extra really good themes equivalent to LTE voice calls and the later releases of the standards. This methodical strategy permits readers to maneuver directly to take on the requisites and the extra complex texts with confidence.
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Additional resources for An Introduction to LTE: LTE, LTE-Advanced, SAE, VoLTE and 4G Mobile Communications
To help deal with this issue, the book contains references to all the important specifications that we will use. 0. Here, TS stands for technical specification, 23 is the series number and 401 is the number of the specification within that series. 11 is the release number, 6 is the technical version number within that release and the final 0 is an editorial version number that is occasionally incremented for non-technical changes. 3GPP also produces technical reports, denoted TR, which are purely informative and have three-digit specification numbers beginning with an 8 or 9.
Because of this issue, voice applications do not form an integral part of LTE. However, an LTE mobile can still make a voice call using two main techniques. The first is circuit switched fallback, in which the network transfers the mobile to a legacy 2G or 3G cell so that the mobile can contact the 2G/3G circuit switched domain. The second is by using the IP multimedia subsystem (IMS), an external network that includes the signalling functions needed to set up, manage and tear down a voice over IP call.
It communicates with the radio access network over the air interface, also known as the radio interface. The direction from network to mobile is known as the downlink (DL) or forward link and the direction from mobile to network is known as the uplink (UL) or reverse link. A mobile can work outside the coverage area of its network operator by using the resources from two public land mobile networks: the visited network, where the mobile is located and the operator’s home network. This situation is known as roaming.
An Introduction to LTE: LTE, LTE-Advanced, SAE, VoLTE and 4G Mobile Communications by Christopher Cox