%0 Journal Article
%A LI Kun
%A LIU Wei
%A OUYANG Wei-ping
%A SONG Mei
%A TENG Ying-lei
%T Queue-Aware Joint Optimization of Offloading and Transmission in Wireless Mobile Edge Computing Systems
%D 2019
%R 10.13190/j.jbupt.2018-256
%J Journal of Beijing University of Posts and Telecommunications
%P 14-20
%V 42
%N 3
%X Considering task queue model on both user and mobile edge computing (MEC) server side, a dynamic computing task offloading problem in multi-user-multi-MEC-server system is proposed. To find the optimal offloading and corresponding uplink precoding strategy, a long-term average overhead containing delay and power consumption of the whole system optimization problem is formulated. The original problem is transformed into a single-stage cost target optimization problem based on Lyapunov optimization method and further converted into a typical DC programming problem by utilizing successive approximation and semi-definite relaxation. Simulation shows that the proposed scheme characterized by optimizing precoding design can meet the lower delay and power consumption requirements.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2018-256