Abstract
Future multi-radio infrastructure for the fourth generation (4G) will combine existing radio network technologies into a common communication system. For such an infrastructure, we propose a multi-radio management (MRM) that enables optimized access selection and handover control for mobile users and increases the overall efficiency of network resources. This paper presents the MRM concept by its functional architecture, its main and supporting functions, the migration of the 3rd Generation Partnership Project (3GPP) system architecture evolution, and last but not least, results from a demonstrator and simulations. MRM comprises multi-radio resource management (MRRM) and multi-radio mobility management (MRMM), which are tightly coupled to corresponding legacy subsystems through an abstraction and adaptation layer (AAL). In this way, MRM interworks with different radio access technologies (RATs) and extends their legacy functions with multi-radio control and sophisticated management based on generic mechanisms and virtualized interfaces. MRM is scalable due to the distribution of MRM across network nodes, and future RATs can be added seamlessly due to the AAL concept.
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