Garkusha S. Models and methods for improving productivity of wireless telecommunication systems based on optimal allocation of network resources

Models and methods to improve productivity of wireless telecommunication systems based on optimal allocation of network resources were offered. The proposed models and methods allow to formalize and to solve basic problems of network resource allocation taking into account functioning features of heterogeneous wireless technologies. Firstly, models and methods for optimal allocation of frequency channels and flow-based routing in multi-channel multi-interface IEEE 802.11 mesh-network by use of hypergraph and Koenig graph were proposed. Secondly, models for optimal allocation of frequency and time-frequency resources in downlink within IEEE 802.16 and LTE technologies with guaranteed bandwidth for user stations were developed. Thirdly, by presenting IEEE 802.16 mesh-networkі as a hypergraph and Konig graph a model for balanced allocation of frequency resources among user stations was offered. Fourthly, tensor model for traffic management in wireless telecommunication systems with ensuring Quality of Service (QoS) under multiple metrics was improved. The model takes into account the packet losses caused by overflow of buffer queues on the network routers. It allows obtaining in the analytical form the conditions to provide with required multiple various QoS metrics, namely, the transmission rate, average delay and packet loss probability simultaneously.