Optimization of GSM-UMTS core network for IP convergence in 4G through Mobile IPv6

The need for mobility, autonomy, permanent access to information and mobile computing are some of the realities of today\´s communication society. Considering the wide area of communication technologies, the convergence of different types of networks (WiFi, GSM/UMTS, Satellite etc.) represents the solution for the achievement of the "whenever and wherever" paradigm, that is one of the objectives of 4G networks. Maintaining the existing GSM/UMTS core networks for the transition period to the new architecture of 4G networks and integration of present 2.5G and 3G networks would reduce costs for telecom operators. The paper presents solutions for a network architecture based on Mobile IPv6 and its implementation for the GPRS core as an important way to extend the lifetime of traditional 2.5G and 3G networks.