无线MEC系统中队列状态感知的卸载和 传输联合优化

针对多用户-多移动边缘计算服务器系统的动态计算任务卸载问题，基于用户端和服务器端的任务队列模型，以系统的长期平均时延和长期平均功耗为优化目标，求解最优的卸载策略及相应的上行预编码.通过李雅普诺夫优化方法将长期平均问题转化成单阶段目标优化问题，考虑到卸载策略和预编码之间存在范数约束关系，通过连续近似和半正定松弛，可转化成典型的DC规划求预编码解问题.仿真结果表明，所提方案比传统方法具有更低的时延和功耗.

Queue-Aware Joint Optimization of Offloading and Transmission in Wireless Mobile Edge Computing Systems

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.