The Gateway GPRS Support Node (GGSN) is a main component of the GPRS network. The GGSN is responsible for the interworking between the GPRS. Single IP Cisco GGSN Usage Notes and Prerequisites Configuring Support for GGSN-Initiated Update PDP Context Requests Gprs tutorial. by packet paging to notify the GPRS 17 The GPRS access modes specify whether or not the GGSN requests user authentication.
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With GPRS providing a move from circuit switched technology to packet switched technology, it was necessary to upgrade the network architecture to accommodate this. Accordingly the introduction of GPRS technology saw the addition of some new entities within the over network architecture. With GPRS providing additional connectivity in terms of packet data, there are tutoral a number of upgrades needed to the network architecture required.
A number of new elements are needed for the network, but these can operate alongside the existing elements meaning ggsj the GPRS capability is an upgrade to the network and not a completely new network structure. A simplified view of the GPRS network architecture can be seen in the diagram below.
OpenBSC GPRS – Cellular Network Infrastructure – Open Source Mobile Communications
From this it can be seen that it is very similar to the more basic GSM network architecture, but with additional elements. It provides a variety of services to the mobiles:. There is a location register within the SGSN and this stores location information tuforial. It also stores the user profiles e.
These may include both Internet and X. The GGSN can be considered to be tutoorial combination of a gateway, router and firewall as it hides the internal network to the outside. In operation, when the GGSN receives data addressed to a specific user, it checks if the user is active, then forwarding the data.
In tutorrial opposite direction, packet data from the mobile is routed to the right destination network by the GGSN. The PCU itself may be a separate physical entity, or more often these days it is incorporated into the base station controller, BSC, thereby saving additional hardware costs.
Packet Data Solutions
One of the ggsj elements for any network operator is the cost of capital expenditure capex to buy and establish a network. Capex costs are normally very high for tutoorial new network, and operators endeavour to avoid this and use any existing networks they may have to make the optimum use of any capital.
In addition to the capex, there are the operational costs, opex. These costs are for general maintenance and other operational costs that may be incurred.
GPRS Network Architecture Tutorial
Increasing efficiency and reliability will reduce the opex costs. The upgrades for the GPRS network are not as large as starting from scratch and rolling out a new network.
The base station subsystems require some updates. The main one is the addition of the PCU described above.
Some modifications may be required to the BTS, but often only a software upgrade is required, and this may often be achieved remotely. In this way costs are kept to a minimum. In this way network operators could evolve their networks through GPRS and possibly EDGE to the full 3G networks without having tutoial replace and install more new equipment than was absolutely necessary.
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