Gsm system architecture

Hard to fathom, but it really wasn't all that long ago that even a plain old telephone was a luxury item. But, as we all know, technology's only constant is change. In this day and age, many folks need to be accessible everywhere, whether they're at work or play, in the office or at home. To meet this demand, the GSM standard (Global System for Mobile Communications) for mobile telephony was introduced in the mid- 1980s. Today, GSM is the most popular mobile radio standard in the world. A boom is underway, such that many GSM users find life without their phone practically inconceivable....

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Be familiar with the development of 2G mobile systems. Describe the architecture of a GSM network. Appreciate the main services provided within a GSM network. Understand the various facets of the GSM air interface including, access structures, frequency allocations, physical and logical channels.

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ANSI-41 MAP Operations Table F-2 details the ANSI-41D MAP operations [1] and their respective codes. Unlike GSM MAP operations, they are not precategorized into sections. Table F-2. ANSI-41 MAP Operations

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Short Message Service (SMS) SMS provides paging functionality for alphanumeric messages of up to 160 characters to be exchanged with other GSM users. The network itself can also generate messages and broadcast to multiple MSs or to a specific MS.

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Mobility Management and Call Processing This section provides an introductory overview of mobility management (i.e., allowing a subscriber to roam) and call processing (the setting up and clearing down of calls) in GSM networks. Mobility management entails keeping track of the MS while it is on the move. The mobility management procedures vary across three distinct scenarios, namely

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Interfaces and Protocols The previous section introduced GSM network architecture, and this section introduces the SS7/C7 protocols that are used. It also discusses interfaces, because different protocols

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Interfaces and Protocols The previous section introduced GSM network architecture, and this section introduces the SS7/C7 protocols that are used. It also discusses interfaces, because different protocols are used

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EVOLVING MOBILE NETWORKS While the history of mobile communications is long [1–3], and the background of mo bile networks therebyx is also long, in this chapter we focus on the historic evolution in terms of network architecture and services starting with 2nd generation (2G) mobile systems. In particular we consider the development of the architecture of Global Systems for Mobile Communications (GSM), since it is by far the most widespread mobile system in the world today.

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GSM (Global System for Mobile Communications, originally Groupe Spécial Mobile), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe technologies for second generation (2G) digital cellular networks. Developed as a replacement for first generation (1G) analog cellular networks, the GSM standard originally described a digital, circuit switched network optimized for full duplex voice telephony.

178p zicokim 19-03-2010 357 206   Download