Saturday, 12 November 2011
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HISTORY OF WIRELESS COMMUNICATION
The origins of mobile communications followed quickly behind the invention of radio in the late 1800s. The first applic...RADIO BASE STATION (RBS)
RBS INTRODUCTION An RBS includes all radio and transmission interface equipment needed on site to provide radio tran...FREQUENCY CONCEPTS
The following table summarizes the frequency-related specifications of each of the GSM systems. The terms used ...KEY TERMS
During the development of mobile systems, many terms arose which are used to describe the call cases and situations ...BSC/TRC
It is possible to combine the functions of the TRC and BSC in one AXE-based node. The subsystems in a BSC/TRC are the...BASE STATION CONTROLLER (BSC)
BSC FUNCTIONS The BSC controls a major part of the radio network. Its most important task is to ensure the highest p...MOBILE STATION CLASSES
Different types of MSs have different output power capabilities and therefore different ranges. Hand-held phones gene...Switching System
INTRODUCTION The Switching System in GSM systems contains the following components: Switching System Switc...TRAFFIC CASES: MS IN ACTIVE MODE
An MS is in active mode when there is a call (speech, fax or data), or a call set up procedure taking place. Cas...Mobile Stations
INTRODUCTION The MS is the equipment used to access the network. The MS consists of two independent parts: • Subscr...
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