Patent ID: 8027309
Filing Date: 2011-09-27
Classification: H04L,H04W

Abstract:
1. A communications system for providing a user's mobile station with an Internet Protocol (IP) connectivity, comprising: an IP network gateway for allocating an IP address to the user's mobile station to enable the user's mobile station to access an IP network, a first base station for supporting communications of the user's mobile station over a first radio access network using a first radio access technology, a first access gateway for providing an interface between the IP network gateway and the first radio access network, a second base station for supporting communications of the user's mobile station over a second radio access network using a second radio access technology different from the first radio access technology, a second access gateway for providing an interface between the IP network gateway and the second radio access network, and a handover interface provided between the first access gateway and the second access gateway for enabling the user's mobile station to switch between the first radio access network and the second radio access network.