GSM Architecture PDF
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The document provides an overview of GSM architecture, highlighting its different components and functions. It describes the Mobile Station, Base Station Subsystem, Network Switching Subsystem, and Operation Support Subsystem, along with additional components like databases and messaging systems. The document includes diagrams of GSM network areas, such as Cells, Location Areas, and MSC/VLR Service Areas.
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GSM - ARCHITECTURE http://www.tutorialspoint.com/gsm/gsm_architecture.htm Copyright © tutorialspoint.com A GSM network comprises of many functional units. These functions and interfaces are explained in this chapter. The GSM network can be broadly divided into: The Mobile St...
GSM - ARCHITECTURE http://www.tutorialspoint.com/gsm/gsm_architecture.htm Copyright © tutorialspoint.com A GSM network comprises of many functional units. These functions and interfaces are explained in this chapter. The GSM network can be broadly divided into: The Mobile Station MS The Base Station Subsystem BSS The Network Switching Subsystem NSS The Operation Support Subsystem OSS Given below is a simple pictorial view of the GSM architecture. The additional components of the GSM architecture comprise of databases and messaging systems functions: Home Location Register HLR Visitor Location Register VLR Equipment Identity Register EIR Authentication Center AuC SMS Serving Center SMSSC Gateway MSC GMSC Chargeback Center CBC Transcoder and Adaptation Unit TRAU The following diagram shows the GSM network along with the added elements: The MS and the BSS communicate across the Um interface. It is also known as the air interface or the radio link. The BSS communicates with the Network Service Switching NSS center across the A interface. GSM network areas In a GSM network, the following areas are defined: Cell : Cell is the basic service area; one BTS covers one cell. Each cell is given a Cell Global Identity CGI, a number that uniquely identifies the cell. Location Area : A group of cells form a Location Area LA. This is the area that is paged when a subscriber gets an incoming call. Each LA is assigned a Location Area Identity LAI. Each LA is served by one or more BSCs. MSC/VLR Service Area : The area covered by one MSC is called the MSC/VLR service area. PLMN : The area covered by one network operator is called the Public Land Mobile Network PLMN. A PLMN can contain one or more MSCs. Loading [MathJax]/jax/output/HTML-CSS/jax.js
