Date Added: Jul 2011
The LTE architectural model developed by 3GPP proposed solutions to achieve high data rates, lighter network architectures and easier achievement of security requirements. Designed as a fully sustained IP network, the LTE provides unified access to a variety of services networks, via its EPC component. The core network of this LTE/4G architecture is designed to facilitate faster and more secure access to the services desired by the user, while providing a high level of predictability, control and charging for the services accessed. 4G architecture was designed in such a manner that it is also interoperable with existing 3G systems, as well as with non-3GPP systems. When describing such a flexible design, the security constraints cannot be neglected.