Resource Virtualization in OFDMA Wireless Mesh Network for Emergency Communications

Wireless mesh network (WMN), also known as the multi-hop network, has a huge application prospect in emergency communications with numerous advantages such as easy deployment and diverse structure. This paper focuses on the research of resource virtualization in orthogonal frequency division multiple access (OFDMA) WMN, where a model of virtual request multi-path access scheme is proposed. Furthermore, the virtual link rates are scheduled to different slices with delay-bounded quality of service (QoS) provisioning for delay-sensitive traffic flows. In addition, the system model is divided into two sub-problems, including physical resource allocation based on the principle of proportional fairness and virtual link multi-path mapping based on load balancing. Finally, a two-layer dynamic interaction algorithm is proposed to solve the original problem to meet the optimization target. Simulation results demonstrate the effectiveness and stability of the algorithm.