By Christopher Cox
Following on from the winning first version (March 2012), this booklet supplies a transparent rationalization of what LTE does and the way it really works. The content material is expressed at a structures point, providing readers the chance to understand the major components that make LTE the new subject among proprietors and operators around the globe. The publication assumes not more than a simple wisdom of cellular telecommunication structures, and the reader isn't anticipated to have any past wisdom of the complicated mathematical operations that underpin LTE.
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Additional info for An Introduction to LTE (2nd Edition)
16–2001) was for a system that delivered data over point-to-point microwave links instead of fixed cables. 16–2004), supported point-to-multipoint communications between an omni-directional base station and a number of fixed devices. 16e), allowed the devices to move and to hand over their communications from one base station to another. Once these capabilities were all in place, WiMAX started to look like any other 3G communication system, albeit one that had been optimized for data from the very beginning.
Info Introduction 7 original ideas from 2G, by introducing the core network’s packet switched domain and by modifying the air interface so that it could handle data as well as voice. 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.
In the packet switched domain, gateway GPRS support nodes (GGSNs) act as interfaces to servers and packet data networks in the outside world. Serving GPRS support nodes (SGSNs) route data between the base stations and the GGSNs, and handle the signalling messages that set up, manage and tear down the data streams. Once again, a typical network might just contain a few of each device. The home subscriber server (HSS) is a central database that contains information about all the network operator’s subscribers and is shared between the two network domains.