Distributed Assignment with Load Balancing for DNN Inference at the Edge

Yuzhe Xu, Thaha Mohammed, Mario Di Francesco, Carlo Fischione

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
232 Downloads (Pure)

Abstract

Inference carried out on pre-trained deep neural networks (DNNs) is particularly effective as it does not require re-training and entails no loss in accuracy. Unfortunately, resource-constrained devices such as those in the Internet of Things may need to offload the related computation to more powerful servers, particularly, at the network edge. However, edge servers have limited resources compared to those in the cloud; therefore, inference offloading generally requires dividing the original DNN into different pieces that are then assigned to multiple edge servers. Related approaches in the state of the art either make strong assumptions on the system model or fail to provide strict performance guarantees. This article specifically addresses these limitations by applying distributed assignment to deep neural network inference at the edge. In particular, it devises a detailed model of DNN-based inference, suitable for realistic scenarios involving edge computing. Optimal inference offloading with load balancing is also defined as a multiple assignment problem that maximizes proportional fairness. Moreover, a distributed algorithm for DNN inference offloading is introduced to solve such a problem in polynomial time with strong optimality guarantees. Finally, extensive simulations employing different datasets and DNN architectures establish that the proposed solution significantly improves upon the state of the art in terms of inference time (1.14 to 2.62 times faster), load balance (with a Jain’s fairness index of 0.9), and convergence (one order of magnitude less iterations).
Original languageEnglish
Article number9882293
Pages (from-to)1053-1065
Number of pages13
JournalIEEE Internet of Things Journal
Volume10
Issue number2
Early online date9 Sept 2022
DOIs
Publication statusPublished - 15 Jan 2023
MoE publication typeA1 Journal article-refereed

Keywords

  • Servers
  • Task analysis
  • Computational modeling
  • Internet of Things
  • Training
  • Edge computing
  • Computer architecture

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