Service Time Maximization for Data Collection in Multi-UAV-Aided Networks

Funding Agencies|Department of Science and Technology [DST/INSPIRE/04/2016/001127, CRG/2020/005749]; IIT Ropar ISIRD [9-362/2018/IITRPR/1590]
Unmanned aerial vehicles (UAVs) have been enormously gaining attention to offload traffic or collect data in wireless networks due to their key attributes, such as mobility, flexibility, and cost-effective deployment. However, the limited onboard energy inhibits the UAV from serving for a longer duration. Therefore, this article studies a UAV-aided network where multiple UAVs are launched to collect data from the mobile nodes. In particular, we aim to maximize the service time of the UAVs by jointly optimizing the three-dimensional (3D) trajectory of the UAVs and resources allocated to each node by the UAVs such that each mobile node receives a minimum specified data rate. To facilitate a solution, we construct an equivalent problem that considers the UAV's energy consumption. In particular, we minimize the maximum energy consumed by the UAVs in each time slot. To solve the problem, an iterative approach is presented that decouples the problem into two sub-problems. The optimal location of the UAVs is computed in the first sub-problem, while resource allocation is carried out in the second sub-problem. These two sub-problems are solved in an iterative manner using the alternating optimization approach. We show that the proposed approach improves the service time of the network by 20% on average compared to the existing approaches.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Kommunikationssystem hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Communication Systems hsv//eng
Trajectory; Mobile nodes; Autonomous aerial vehicles; Wireless networks; Resource management; Data collection; Energy consumption; Energy management; mobile nodes; Multi-UAV-aided wireless networks; multi-UAV trajectory; resource management

Gupta, NishantLinköpings universitet,Kommunikationssystem,Tekniska fakulteten(Swepub:liu)nisgu99 (author)
Agarwal, SatyamIIT Ropar, India (author)
Kumbhani, BrijeshIIT Ropar, India (author)
IIT Delhi, IndiaKommunikationssystem (creator_code:org_t)

In:IEEE Transactions on Intelligent Vehicles: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC9:1, s. 328-3372379-88582379-8904

By the author/editor: Dandapat, Jyotir ...; Gupta, Nishant; Agarwal, Satyam; Kumbhani, Brijes ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Communication Sy ...

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