Research Article
Gradient-Based UAV Positioning Algorithm for Throughput Optimization in UAV Relay Networks
@INPROCEEDINGS{10.1007/978-3-030-41117-6_23, author={Xiangyu Li and Tao Peng and Xiaoyang Li}, title={Gradient-Based UAV Positioning Algorithm for Throughput Optimization in UAV Relay Networks}, proceedings={Communications and Networking. 14th EAI International Conference, ChinaCom 2019, Shanghai, China, November 29 -- December 1, 2019, Proceedings, Part II}, proceedings_a={CHINACOM PART 2}, year={2020}, month={2}, keywords={UAV relay network Throughput optimization Gradient-based positioning}, doi={10.1007/978-3-030-41117-6_23} }- Xiangyu Li
Tao Peng
Xiaoyang Li
Year: 2020
Gradient-Based UAV Positioning Algorithm for Throughput Optimization in UAV Relay Networks
CHINACOM PART 2
Springer
DOI: 10.1007/978-3-030-41117-6_23
Abstract
Under natural disaster or other emergency situations, the fixed communication infrastructures are unavailable, which brings great inconvenience to information interaction among people. In this paper, we design a UAV relay network, using a small-scale UAV fleet serves as communication relays of a team of ground users performing collaborate tasks. Aiming at the user’s requirement for high communication capacity for multi service transmission, we present a distributed gradient-based algorithm of finding the optimal positions of UAV in UAV relay network to improve the network average end-to-end throughput in real-time. The system optimization objective is formulated by using Shannon-Hartley Theorem and received signal-to-noise ratio (SNR) that incorporates with UAV positions and ground user positions. Due to the non-smoothness of the objective function, we use generalized gradient instead. Each UAV moves along the generalized gradient direction of objective function to optimize the target locally, and finally, all UAV convergence to stable positions of optimizing the network throughput. Simulation results show the effectiveness of our method in improving the network average end-to-end throughput.
