南京邮电大学学报（自然科学版）2024，Vol.44Issue(3)：33-41,9.DOI:10.14132/j.cnki.1673-5439.2024.03.005
基于NOMA和用户协作的上行移动边缘计算卸载效率优化
Offloading efficiency optimization for uplink mobile edge computing based on NOMA and user collaboration
摘要
Abstract
To meet the demand of large-scale computing tasks and the challenge of limited transmission resources and serious channel fading,we propose a non-orthogonal multiple access(NOMA)and user cooperation assisted uplink mobile edge computing(MEC)offloading scheme.In this scheme,the user offloads computing tasks to the MEC server through NOMA to improve spectrum efficiency,and the local user helps the remote user with offloading to reduce the impact of outages on computing offloading.To achieve the best tradeoff between unloading quantity and energy consumption,the offloading efficiency is defined as the ratio of the amount of successfully offloaded data to the energy consumed by users.A joint optimization problem is established to maximize the offloading efficiency by adjusting the offloading time and power allocation.To solve this problem,a closed-form expression of the outage probability of a pair of users is derived.Then,the nonconvex problem is transformed into a relaxed problem and solved by continuous convex approximation.The simulation analyzes the outage performance of the system,and the results demonstrate that the proposed method can achieve higher offloading efficiency compared with other schemes.关键词
移动边缘计算/非正交多址接入/用户协作/计算卸载Key words
mobile edge computing(MEC)/non-orthogonal multiple access(NOMA)/user cooperation/computational offloading分类
信息技术与安全科学引用本文复制引用
李洋,胡阳,罗先南,刘昕,齐婷..基于NOMA和用户协作的上行移动边缘计算卸载效率优化[J].南京邮电大学学报（自然科学版）,2024,44(3):33-41,9.基金项目
国家电网有限公司总部管理科技项目(5700-202040380A-0-0-00)和江苏省自然科学基金(BK20200759)资助项目 （5700-202040380A-0-0-00）
