Joint task offloading and resource allocation for secure OFDMA-based mobile edge computing systems

IF 4.4 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Ad Hoc Networks Pub Date : 2023-11-03 DOI:10.1016/j.adhoc.2023.103342

Yan Huo, Qiyuan Liu, Qinghe Gao, Yingzhen Wu, Tao Jing

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Abstract

With the advent of the fifth generation (5G) era, Mobile edge computing (MEC) has become a promising technology. In order to increase the spectrum utilization efficiency and mitigate interference between users, Orthogonal Frequency-Division Multiple Access (OFDMA) technology is introduced into MEC systems. However, uplink offloading signals from users to servers are vulnerable to malicious eavesdropping. We utilize physical layer security, specifically, jamming caused by servers and co-frequency interference provided by users in non-orthogonal multiple access (NOMA) groups to address this issue. This paper investigates an OFDMA based MEC system which consists of multiple users, multiple servers and an eavesdropper. For this system, an innovative algorithm is designed to minimize latency of the system through optimizing resource allocation and task offloading policy which has lower computation complexity while ensuring its security. The proposed scheme can decrease system latency and ensure secure communication according to experimental results.

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基于ofdma的安全移动边缘计算系统联合任务卸载与资源分配

随着第五代(5G)时代的到来，移动边缘计算(MEC)已经成为一项有前途的技术。为了提高频谱利用率和减少用户间的干扰，在MEC系统中引入了正交频分多址(OFDMA)技术。但是，从用户到服务器的上行卸载信号容易被恶意窃听。我们利用物理层安全性，特别是服务器引起的干扰和非正交多址(NOMA)组中用户提供的共频干扰来解决这个问题。本文研究了一种基于OFDMA的MEC系统，该系统由多个用户、多个服务器和一个窃听器组成。针对该系统，设计了一种创新的算法，通过优化资源分配和任务卸载策略，在保证系统安全性的同时降低计算复杂度，最大限度地降低系统延迟。实验结果表明，该方案能够有效降低系统时延，保证通信安全。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ad Hoc Networks 工程技术-电信学

CiteScore

10.20

自引率

4.20%

发文量

131

审稿时长

4.8 months

期刊介绍： The Ad Hoc Networks is an international and archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in ad hoc and sensor networking areas. The Ad Hoc Networks considers original, high quality and unpublished contributions addressing all aspects of ad hoc and sensor networks. Specific areas of interest include, but are not limited to: Mobile and Wireless Ad Hoc Networks Sensor Networks Wireless Local and Personal Area Networks Home Networks Ad Hoc Networks of Autonomous Intelligent Systems Novel Architectures for Ad Hoc and Sensor Networks Self-organizing Network Architectures and Protocols Transport Layer Protocols Routing protocols (unicast, multicast, geocast, etc.) Media Access Control Techniques Error Control Schemes Power-Aware, Low-Power and Energy-Efficient Designs Synchronization and Scheduling Issues Mobility Management Mobility-Tolerant Communication Protocols Location Tracking and Location-based Services Resource and Information Management Security and Fault-Tolerance Issues Hardware and Software Platforms, Systems, and Testbeds Experimental and Prototype Results Quality-of-Service Issues Cross-Layer Interactions Scalability Issues Performance Analysis and Simulation of Protocols.