GSM Networks: Protocols, Terminology, and Implementation - download pdf or read online

By Gunnar Heine

ISBN-10: 0890064717

ISBN-13: 9780890064719

This article bargains a complete therapy of the full GSM community and the signalling equipment of its terrestrial interfaces. It introduces the entire interfaces among the GSM subsystems, beginning with the Abis- and Air-Interface and carrying on with directly to VLRs, HLRs and MSCs in the NSS. The reader learns in regards to the a number of signalling criteria or tools utilized in GSM, together with TCAP and MAP, and the way to use this data whilst operating with GSM networks. The word list explains abbreviations, phrases, parameters, counters and messages usually encountered whilst operating with GSM. furthermore, it good points a number of figures, tables, lists, statistical formulation, real-life examples and daily comparisons.

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Additional info for GSM Networks: Protocols, Terminology, and Implementation (Artech House Mobile Communications Library.)

Example text

2 Connection of BTSs in Star Configuration The star configuration was the most popular when the first systems were deployed in 1991–1992. In a star configuration, every BTS has it own connection, an Abis-interface to the BSC. 4 illustrates a star configuration with three BTSs. 5). Layer 1 forms the D-channel. The LAPD is in Layer 2, and Layer 3 is divided into the TRX management (TRXM), the common channel management (CCM), the radio link management (RLM), and the dedicated channel management (DCM).

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. Neither the sender nor the addressee is concerned about the details of the service, that is, about how the letter is routed, and neither the sender nor the addressee needs to communicate with the letter carrier.

7, the BTS starts to transmit TRAU frames in the uplink, immediately after receiving the CHAN_ACT message. Those TRAU frames carry inband signaling, which is exchanged between the BTS-TRX (or more precisely the coding unit) and the TRAU, to consolidate the characteristics of a connection. Part of the control information is, in particular, synchronization data, discontinuous transmission (DTX) on/off, and the connection type (halfrate/fullrate). 7 Activation of the TRAU during assignment of a traffic channel.

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GSM Networks: Protocols, Terminology, and Implementation (Artech House Mobile Communications Library.) by Gunnar Heine

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