QoS performances of heterogeneous networks with multiple radio access technologies

The paper presents a QoS framework for terminals with multi-RAT (multiple radio access technologies) interfaces for heterogeneous network environment. It investigates a QoS provisioning with vertical multi-homing and multistreaming features for 5G heterogeneous networks. The presented enhanced framework for 5G systems leads to better performance opportunities for multimedia services with very high level of QoS provisioning in different radio access network (RAN) conditions. The system framework is user-centric oriented, with ability to simultaneously handle multiple RAN connections, choosing the most appropriate RAN for each used service. This paper evaluates the key QoS parameters for multimedia traffic in heterogeneous mobile and wireless scenarios were multiple RANs coexist in the simulation set up. The simulation scenarios includes 3G, 4G, and 5G radio access networks and use Genetic Algorithm and Linear Programming algorithm to solve the optimization problem. The analysis shows significantly high QoS performance for the achievable aggregated throughput and multimedia access probability ratio in heterogeneous wireless and mobile environment, especially in case of large number of available heterogeneous nodes.