Energy-effective offloading scheme in UAV-assisted C-RAN system

Xingquan Li, Chiya Zhang*, Rujun Zhao, Chunlong He, Hongxia Zheng, Kezhi Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we aim to minimize the total power of all the Internet of Things devices (IoTDs) by jointly optimizing user association, computation capacity, transmit power, and the location of unmanned aerial vehicles (UAVs) in an UAV-assisted cloud radio access network (C-RAN). In order to solve this non-convex problem, we propose an effective algorithm by solving four subproblems iteratively. For the user association and the computation capacity subproblems, the non-convex constraints are relaxed and the optimal solutions are obtained. For the transmit power control and the location planning subproblems, successive convex approximation (SCA) technique is used to transform the non-convex constraints into convex ones. Moreover, to obtain the suboptimal solutions, slack variables are also introduced to deal with the feasibility-check problems. The simulation results demonstrate that the proposed algorithm can greatly reduce the total power consumption of IoTDs.
Original languageEnglish
Number of pages12
JournalIEEE Internet of Things Journal
Early online date15 Nov 2021
DOIs
Publication statusE-pub ahead of print - 15 Nov 2021

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