移动云环境下高能效的移动终端计算迁移策略

Energy-efficient computation offloading strategy for the terminal in mobile cloud environment

针对移动应用需要消耗大量计算资源和能量,迫切需要能够改进移动终端计算性能和电池续航能力的新技术,面向长期演进应用,提出一种移动云环境下高能效的移动终端计算迁移策略.该策略以移动终端发射功率和中央处理器计算速度为约束条件,通过分析应用程序的需求、移动终端计算能力及无线信道状态,优化移动终端的发射功率和应用程序对中央处理器计算资源的占用,合理实施计算迁移,达到移动终端能耗最小化的目标.仿真结果表明,该策略能够有效节省移动终端的能耗,而且基本不会带来附加的时间延迟.

As the popularity of smart mobile terminals increase in recent years, mobile applications are becoming more diverse and complex These applications require large amounts of computing resources and energy. Therefore, there is an urgent need for new technologies capable of improving the computing performance and battery life of mobile terminals. Orienting to LTE, an energy efficient computation offloading strategy for mobile terminals is proposed which can be used in mobile cloud environment. By taking the transmitting power and CPU speed as constraints, the strategy analyzes requirements of an application program, the mobile terminal＇s computing power and the status of fading channel; afterwards it optimizes the transmitting power and CPU computing resources sensibly. It can minimize the mobile terminal＇s energy consumption by implementing reasonable computation offloading. Simulation results show that the proposed strategy can save a mobile terminal＇s energy consumption, and it does not bring obvious additional delay simultaneously.