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General Packet Radio Service is a standard for wireless
Communications. The service facilitates access to Internet at Higher speeds.
This enables services such as colour Internet browsing, e-mail on the move,
powerful visual communications, multimedia messages.
network in GPRS (General Packet Radio Services) refereed to as the 2.5G
wireless packet data networks will provide interoperability between the
radio access network (RANs) and the external networks. It will also
provide and support the feature servers operators will deploy for
increasing the number and variety of subscriber services. The core network
extends internet protocol based packet data services to the radio access
infrastructure and hence is capable of routing IP packets within the
context of mobility. The basic GPRS core network infrastructure and
elements will also be used in the release 99specifications for the 3G UMTS
core networks which use the European wideband CDMA air interface standard.
Therefore a discussion of the GPRS core network should cover the basic
core network infrastructure and function in the 3G UMTS networks, as well.
3G networks have been designed with wideband capabilities, allowing
significantly higher data rates for mobile multimedia and Internet-based
services of the future. The effects of the introduction of packet-switched
services as well as higher data rates will pose significant challenges to
the design of the core networks. The design of the core networks involves
issues related to node location and dimensioning, the choice of appropriate
transport technologies, interconnect topologies, traffic considerations,
interconnect sizing and quality of service. This paper has reviewed the
alternative choices and their merits as well as some of the design
parameters that the network operator will face in providing a cost effective
network to provide the necessary performance. Building the core network
requires an operator to make several decisions, which will affect the
scalability, reliability, quality, and cost of the network.