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Deep Reinforcement Learning for Online Computation Offloading in Wireless Powered Mobile-Edge Computing Networks.

Authors :
Huang, Liang
Bi, Suzhi
Zhang, Ying-Jun Angela
Source :
IEEE Transactions on Mobile Computing; Nov2020, Vol. 19 Issue 11, p2581-2593, 13p
Publication Year :
2020

Abstract

Wireless powered mobile-edge computing (MEC) has recently emerged as a promising paradigm to enhance the data processing capability of low-power networks, such as wireless sensor networks and internet of things (IoT). In this paper, we consider a wireless powered MEC network that adopts a binary offloading policy, so that each computation task of wireless devices (WDs) is either executed locally or fully offloaded to an MEC server. Our goal is to acquire an online algorithm that optimally adapts task offloading decisions and wireless resource allocations to the time-varying wireless channel conditions. This requires quickly solving hard combinatorial optimization problems within the channel coherence time, which is hardly achievable with conventional numerical optimization methods. To tackle this problem, we propose a Deep Reinforcement learning-based Online Offloading (DROO) framework that implements a deep neural network as a scalable solution that learns the binary offloading decisions from the experience. It eliminates the need of solving combinatorial optimization problems, and thus greatly reduces the computational complexity especially in large-size networks. To further reduce the complexity, we propose an adaptive procedure that automatically adjusts the parameters of the DROO algorithm on the fly. Numerical results show that the proposed algorithm can achieve near-optimal performance while significantly decreasing the computation time by more than an order of magnitude compared with existing optimization methods. For example, the CPU execution latency of DROO is less than 0.1 second in a 30-user network, making real-time and optimal offloading truly viable even in a fast fading environment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
15361233
Volume :
19
Issue :
11
Database :
Complementary Index
Journal :
IEEE Transactions on Mobile Computing
Publication Type :
Academic Journal
Accession number :
146245315
Full Text :
https://doi.org/10.1109/TMC.2019.2928811