Software-defined network-enabled opportunistic offloading and charging scheme in multi-unmanned aerial vehicle ecosystem

摘要

Unmanned aerial vehicles (UAVs) are autonomous fliers, which can play different roles in modern day applications. In one of the important role, UAVs can act as aerial data forwarding nodes for communication range enhancement in remote areas. UAVs form a web of drones, which can be geo-distributed across a large area to serve various applications. However, the two major contradicting challenges with respect to multi-UAV networks are channel congestion and flight time enhancement. The use of effective data transmission techniques to handle congestion can lead to higher battery dissipation, which in turn end up in the reduction in flight time. However, it is utmost necessity to provide an effective framework, which can provide a viable solution for handling congestion in multi-UAV networks while enhancing the flight time of UAVs. To handle these issues, software-defined network (SDN)-enabled opportunistic offloading and charging scheme (SOOCS) in multi-UAV ecosystem is designed in this paper. In this scheme, an opportunistic offloading scheme is proposed, which uses an SDN-based control model to handle congestion issues. Apart from this, an opportunistic energy-charging scheme is designed, wherein the UAVS can either replenish their batteries using solar plates or they can wirelessly charge energy from charging points deployed at various geo-distributed locations. The proposed scheme is evaluated using a simulation-based study over the realistic deployment of charging points in Chandigarh City, India. The results obtained show the superiority of SOOCS over other variants of its category in terms of end-to-end delay, throughput, and hand-over latency.