The number of mobile internet users are increasing more rapidly than the number of desktop internet users. The growth of mobile data traffic has had a huge influence on cellular networks. New mobile applications, different access technologies (HSPA, LTE, Wi-Fi, etc.) and the serving of constantly increasing new user demands set significant challenges to mobile operators. The mobile architectures were basically designed to provide sound services, the support of data services was added later as centralized elements. Existing mobile networks can’t serve effectively the user demands, inflexible and not cost effective. The out-of-date hierarchical system has been replaced by flat system.
The future mobile architecture enables real-time adaptation in dynamic environment, supports frequent mobility, fine-grained control, it is more scalable and performs effective traffic control. The architecture supports new application services, while maintaining Quality of Service (QoS). The introduction of Software Defined Network (SDN) can simplify the network management. The Evolved Packet Core (EPC) specified by 3GPP defines a common platform to effectively handle different access technologies and connect to external IP network. The OpenFlow communications protocol enables high-level routing decisions using a separate controller.
In this thesis I study the future mobile internet architectures. Different OpenFlow networks were realized in INET/OMNET++ network simulation environment and they are evaluated by efficiency and scalability.