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General Packet Radio Service - GPRSGeneral packet radio service is a packet data communication system that uses the global system for mobile (GSM) radio system packet radio transmission. The GPRS system modifies the GSM channel allocation and time slot control processes to allow for the dynamic assignment of time slots to individual users. GPRS provides a maximum radio channel data transmission rate of 171.2 kbps.
General Packet Radio Service (GPRS) System
This figure shows some of the key GPRS network elements that include a gateway GPRS support node (GGSN), a serving GPRS support node (SGSN) and a GPRS backbone network (the Internet in this example.) This example shows that the GPRS system adds dynamic time slot control to the standard GSM radio system. To provide packet data service, the GPRS system, the SGSN provides the processes of switching and access control that is similar to a mobile switching center (MSC) and a visitor location register (VLR). However, the SGSN provides for switching and access control (authorization and tracking) based on packets of data rather than continuous connections. The SGSN registers and maintains a list of active packet data radios in its network and coordinates the packet transfer between the mobile radios. The GGSN is a packet switching system that is used to connect a GSM mobile communication network (GPRS Support Nodes) to other packet networks such as the Internet.
GSM Books
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Introduction to GSM
This book explains the basic components, technologies used, and operation of GSM systems. This book starts with the system components and basic services that the GSM system can provide. You will learn that the key types of GSM devices include single mode and dual mode mobile telephones, wireless PCMCIA cards, embedded radio modules, and external radio modems. You will then discover the different types of available services such as multiple types of voice services, data services, group call, and messaging services. $19.99 Printed, $16.99 eBook |
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