LAUSR

Wireless resource virtualization scheme has been proposed to satisfy the quality of service (QoS) requirement of multi-service traffic flows on multi-dimensional resources. However, it is a challenge to design an appropriate virtual resource allocation strategy for multi-dimensional resource to meet the delay demand of multi-service. In this paper, we study the virtual resource allocation method in TDD-F-OFDM system with MU-MIMO and formulate the multi-service virtual resource optimization problem as a cross-layer problem. Then, we develop an effective dynamic algorithm with an iterative dual update to meet the optimization targets of the Media Access Control (MAC) layer and physical layer. Finally, the simulation results show that our proposed virtual resource allocation algorithm not only achieves better spectral efficiency and flow access ratio, but also guarantees the delay requirements of multi-service flows.