Download GSM Networks: Protocols, Terminology, and Implementation by Gunnar Heine PDF

By Gunnar Heine

This functional publication presents an incredibly entire, updated, and easy-to-understand remedy of the full GSM community and the signaling tools of its terrestrial interfaces. You the way to study community difficulties, what measurements you should take to resolve them, and the place in a state of affairs you will discover the specified info or parameter. The ebook introduces you to all of the interfaces among the GSM subsystems, beginning with the Abis- and Air- Interface and carrying on with directly to VLR's, HLR's and MSC's in the community Switching Subsystem (NSS). You find out about a number of the signaling criteria or tools utilized in GSM, together with TCAP and MAP and the way to use this information while operating with GSM networks.A precise characteristic of the booklet is its large word list that explains abbreviations, phrases, parameters, counters, and messages usually encountered while operating with GSM. furthermore, it positive aspects a variety of figures, tables, lists, statistical formulation, real-life examples, and daily comparisons to offer you an in depth reference that is quickly to take advantage of and simple to appreciate. You get A-to-Z assurance of dozens of issues, including:>Signaling criteria like LAPD, LAPDm, SS7, SCCP, TCAP - GSM functions corresponding to RR, MM, CC, MAP - and the entire protocols utilized in GSM equivalent to LAPD, ISUP, MAP, TCAP, SS7, SCCP, BSSAP, and more>The Subscriber identification Module (SIM) and residential position sign up (HLR)>The OSI reference version and its applicability to GSM>Failure answer either within the lab and on site>Measurements required to investigate community difficulties - and the dependencies of failure messagesThis detailedbook is a pragmatic instruction manual for engineers concerned with all features of the GSM infrastructure - from learn and improvement ( to install, operation, and on-site administration ( to technical help, upkeep, and checking out. it's also a entire self-study consultant for engineers, different technical execs, and university-level scholars with a simple wisdom of telecommunications who are looking to find out about the advanced signaling architectures hired in GSM networks.

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4 Connection of BTSs in a star configuration. The disadvantages are the high costs for links and that a single link failure always causes loss of a BTS. 5 The OSI protocol stack on the Abis interface. 1 Link Access Protocol for D-channel The ISDN D-channel protocol, which GSM largely has adopted, provides the basics of signaling on the Abis-interface. This link access protocol is also referred to as LAPD. 921, is presented first before we discuss the GSM specifics. 921 describe. The XID frame, for example, is currently not used.

Consider the analogy of sending mail. The post office is not concerned about the content of a letter, which it has received to deliver. Its only concern is the address on the envelope, which it follows in order to make the delivery. This constitutes a service, which is independent of the contents of the letter. • Each layer communicates directly only with the layers immediately below and above itself and indirectly with its peer layer at the remote end. Let us again refer to the post office analogy.

1 Function of the Transcoding Rate and Adaptation Unit One of the most interesting functions in GSM involves the TRAU, which typically is located between the BSC and the MSC. The task of the TRAU is to compress or decompress speech between the MS and the TRAU. The used method is called regular pulse excitation–long term prediction (RPE-LTP). 5 Kbps). Note that the TRAU is not used for data connections. 6. 6), a fullrate speech channel uses only 16 Kbps over the link from the BSC to the MSC. The specifications allow for the installation of the TRAU between the BTS and the BSC.

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