Cooperative Data Sensing and Computation Offloading in UAV-Assisted Crowdsensing With Multi-Agent Deep Reinforcement Learning

Ting Cai, Zhihua Yang, Yufei Chen, Wuhui Chen*, Zibin Zheng, Yang Yu, Hong Ning Dai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Unmanned aerial vehicles (UAVs) can be leveragedin mobile crowdsensing (MCS) to conduct sensing tasks at remote or rural areas through computation offloading and data sensing. Nonetheless, both computation offloading and data sensing have been separately investigated in most existing studies. In this paper, we propose a novel cooperative data sensing and computation offloading scheme for the UAV-assisted MCS system with an aim to maximize the overall system utility. First, a multi-objective function is formulated to evaluate the system utility by jointly considering flight direction, flight distance, task offloading proportion, and server offload selection for each UAV. Then, the problem is modeled as a partially observable Markov decision process and a multi-agent actor-critic algorithm framework is proposed to train the strategy network for UAVs. Due to high delay and energy costs caused by communications among multiple agents, we train a centralized critic network to model other agents and to seek equilibrium among all UAVs rather than adopting the explicit channel for information exchange. Furthermore, we introduce attention mechanism to enhance the convergence performance in model training phases. Finally, experimental results demonstrate the effectiveness and applicability of our scheme. Compared with baselines, our algorithm shows significant advantages in convergence performance, system utility, task costs, and task completion rate.

Original languageEnglish
Pages (from-to)3197-3211
Number of pages15
JournalIEEE Transactions on Network Science and Engineering
Volume9
Issue number5
Early online date21 Oct 2021
DOIs
Publication statusPublished - 1 Sep 2022
Externally publishedYes

Scopus Subject Areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Computer Networks and Communications

User-Defined Keywords

  • computation offloading
  • data sensing
  • deep reinforcement learning (DRL)
  • Mobile crowdsensing (MCS)
  • unmanned aerial vehicle (UAV)

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