Resource optimization in wireless powered cooperative mobile edge computing systems

作     者：Qibin YE Weidang LU Su HU Xiaohan XU Qibin YE;Weidang LU;Su HU;Xiaohan XU

作者机构：National Key Laboratory on CommunicationsUniversity of Electronic Science and Technology of China College of Information EngineeringZhejiang University of Technology 

出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))

年 卷 期：2021年第64卷第8期

页      面：56-65页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

基　　金：supported by National Natural Science Foundation of China (Grant No. 61971092) 

主　　题：mobile edge computing user cooperation wireless power transfer energy consumption resource management 

摘      要：Mobile edge computing(MEC) meets the high-bandwidth and ultra-low-latency requirements of mobile networks and improves communication reliability by reducing the networks’ load. In this study, we study a wireless powered MEC system, which includes an access point(AP) and two mobile devices. The endurance of mobile devices can be effectively enhanced using the wireless power transfer technology and user cooperation. However, during user cooperation, a closer user assists a farther user with forwarding tasks by sharing the same bandwidth, which causes interference. To overcome the interference issue, the closer user can instead assist other users in forwarding tasks by using a different bandwidth. We aim to minimize the power of the AP by joint power and bandwidth optimization while satisfying the delay and users’ computational tasks. Simulation results show that the proposed user collaboration method can overcome user interference,reduce energy consumption, and improve user performance compared with the baseline policies.