Adaptive VPN Bonding Technique for Enhancing DualSIM Mobile Internet Access

Mobile Internet access networks are not designed to support real-time data traffic because of several drawbacks concerning the wireless medium such as resource sharing, traffic congestion, radio link coverage etc., which impact directly such parameters as delay, jitter, and packet loss rate that are strictly connected to the quality of user experience. While in a fixed network scenario the gap is reduced arbitrarily by an appropriate dimensioning of the characteristics of ADSL access in terms of guaranteed minimum bandwidth or MCR (minimum cell rate), in a cellular network scenario the quality of service over IP is greatly reduced due to strong current limitations in terms of the requirements regarding delay and guaranteed bandwidth that cannot be arbitrarily decided. The main scope of the present paper is to introduce a dual USIM HSPA access point thanks to which it will be possible to guarantee a QoS suitable for a series of network-centric application such as real-time communications and monitoring, video surveillance, real-time sensor networks, telemedicine, vehicular and mobile sensor networks and so on. The main idea is to exploit multiple radio access networks in order to enhance the available end-to-end bandwidth and the perceived quality of experience. The scope has been reached by combining multiple radio access with dynamic load balancing and the VPN bond technique.