Joint energy and throughput optimization for MEC-enabled multi-UAV IoRT networks

Murthy, C Siva Ram (2023) Joint energy and throughput optimization for MEC-enabled multi-UAV IoRT networks. Computer Communications, 201. pp. 1-19. ISSN 0140-3664

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Abstract

In this paper, we study an Unmanned Aerial Vehicle (UAV) enabled Mobile Edge Computing (MEC) service provisioning to the Internet of Remote Things (IoRT) devices spread randomly on the ground in a remote area. The data generated by the IoRT devices is collected by the UAVs, which immediately relay the data collected to an MEC device installed on the ground at a nearby location. The MEC device receives the data from the UAVs, and sends the results back to the UAVs, which in turn relay them to IoRT devices. We aim to minimize the energy consumption by the IoRT devices and the UAVs, while maximizing the system throughput subject to bandwidth, power, information-causality, and UAVs’ trajectory constraints. We formulate the problem as a Mixed Integer Non Linear Programming problem, which is a complex and non-convex optimization problem. To make the problem tractable, we use variable relaxation. We further develop an iterative algorithm based on Block Coordinate Descent method, to jointly optimize the connection scheduling, power control, bit transmission scheduling, bandwidth allocation, and trajectories of the UAVs. Numerical results demonstrate the convergence of the algorithm and superiority of the proposed model with respect to conventional methods. Our proposed system model of placing MEC at ground shows 9% improvement in energy consumption when compared to carrying out computations at MEC carried by UAV and a 99% improvement when compared to placing MEC at the satellite. The proposed system model shows a 0.2% lower system throughput on average, compared to placing MEC at UAV, which is tolerable considering gains in terms of energy consumption.

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IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Uncontrolled Keywords:

Bandwidth allocation; Bit transmission scheduling; Connection scheduling; IoRT; MEC; Power scheduling; SAGIN; Trajectory design; UAV; Antennas; Bandwidth; Convergence of numerical methods; Convex optimization; Energy utilization; Integer programming; Iterative methods; Mobile edge computing; Power control; Trajectories; Aerial vehicle; Bit transmission scheduling; Connection scheduling; Energy-consumption; Internet of remote thing; Power Scheduling; SAGIN; Trajectory designs; Transmission scheduling; Unmanned aerial vehicle; Unmanned aerial vehicles (UAV)

Subjects:

Computer science

Divisions:

Department of Computer Science & Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

27 Aug 2023 08:50

Last Modified:

27 Aug 2023 08:50

URI:

http://raiithold.iith.ac.in/id/eprint/11632