Scalable Resource Management for Dynamic MEC: An Unsupervised Link-Output Graph Neural Network Approach

• URL: http://arxiv.org/abs/2306.08938v2
• Date: Tue, 20 Jun 2023 00:08:20 GMT
• Title: Scalable Resource Management for Dynamic MEC: An Unsupervised Link-Output Graph Neural Network Approach
• Authors: Xiucheng Wang and Nan Cheng and Lianhao Fu and Wei Quan and Ruijin Sun and Yilong Hui and Tom Luan and Xuemin Shen
• Abstract summary: Deep learning has been successfully adopted in mobile edge computing (MEC) to optimize task offloading and resource allocation. The dynamics of edge networks raise two challenges in neural network (NN)-based optimization methods: low scalability and high training costs. In this paper, a novel link-output GNN (LOGNN)-based resource management approach is proposed to flexibly optimize the resource allocation in MEC.
• Score: 36.32772317151467
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep learning has been successfully adopted in mobile edge computing (MEC) to optimize task offloading and resource allocation. However, the dynamics of edge networks raise two challenges in neural network (NN)-based optimization methods: low scalability and high training costs. Although conventional node-output graph neural networks (GNN) can extract features of edge nodes when the network scales, they fail to handle a new scalability issue whereas the dimension of the decision space may change as the network scales. To address the issue, in this paper, a novel link-output GNN (LOGNN)-based resource management approach is proposed to flexibly optimize the resource allocation in MEC for an arbitrary number of edge nodes with extremely low algorithm inference delay. Moreover, a label-free unsupervised method is applied to train the LOGNN efficiently, where the gradient of edge tasks processing delay with respect to the LOGNN parameters is derived explicitly. In addition, a theoretical analysis of the scalability of the node-output GNN and link-output GNN is performed. Simulation results show that the proposed LOGNN can efficiently optimize the MEC resource allocation problem in a scalable way, with an arbitrary number of servers and users. In addition, the proposed unsupervised training method has better convergence performance and speed than supervised learning and reinforcement learning-based training methods. The code is available at \url{https://github.com/UNIC-Lab/LOGNN}.

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