A new approach for radio resource management in multimedia dynamic satellite networks

Abstract

In this paper a new technique for radio resource management applicable to dynamic satellite networks for multimedia applications is presented. It uses a dynamic channel reservation policy to map the application specific requirements for accepting and maintaining a call. A new service classification scheme is proposed for the future wireless multimedia systems. According to this, the definition of each service class is based on a range of different performance criteria for the call blocking and call dropping rates. This approach can be used for future multi-beam dynamic satellite constellation networks. It is based on the assumption that the user terminal inter spot-beam handoff times can be accurately predicted by the network during the call set-up phase. The call admission controller takes into account the performance requirements of the established connections and the affect of accepting a new call on the same spot-beam as well as the handover attempts from the neighbouring spot-beams. A simulation model was developed in OPNET modeler and statistics for the call blocking and call dropping probabilities under various traffic conditions were recorded. Simulation results for a typical Medium Earth Orbit (MEO) and a Low Earth Orbit (LEO) constellation are presented and the performance of the new algorithm is discussed. It is shown that this new approach gives a great flexibility to dynamically map different service classes requirements into the network performance characteristics.