Dynamic slicing and scheduling for wireless network virtualization in downlink LTE system

Infrastructure providers (InPs) can provide virtual networks (VNs) to service providers (SPs) through wireless network virtualization. These VNs share the wireless spectrum and they are supposed to meet various requirements of different SPs. In order to satisfy the requirements such as quality of service (QoS), fairness and isolation, efficient and flexible slicing and scheduling schemes are necessary. In this paper, to meet the different rate requirements of VNs, we propose a novel slicing and scheduling scheme. In this scheme, each VN is assigned a certain number of sub-channels to provide services to its users. This number is changeable, which reflects the dynamic adjustability of our scheme. Scheduling isolation among VNs is realized in this scheme, which means that users in different VNs will not be scheduled together, and different scheduling schemes can be used for different VNs based on our scheme. Simulation results show that our scheme provides a good balance between fairness and throughput. More importantly, it provides an efficient method for meeting different rate targets of VNs.