An Energy Saving Routing Strategy with Differentiated Service Provide Ability for UAV Assisted Disaster Rescue

The cooperation of multiple Unmanned Aerial vehicles (UAVs) plays a significant role in disaster rescue. This paper aims at improving the performance of UAV networks in the emergency communication scenario. Both the network lifetime and quality of service (QoS) are jointly designed by using the software defined network (SDN) structure. To this end, an energy saving routing strategy (ESRS) and a differentiated queue scheduling scheme (DQSS) are sequentially proposed for the controllers and assess points in the UAV networks. The remaining energy of the frequently used UAV is maximized and the queues of each UAVs are dynamic configured according to the different services priority. Simulation results show that ESRS extends the life of the whole network to nearly three times the original. Through the evaluation of various QoS parameters, DQSS is proven to effectively provide differentiated service.