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The insufficiency of battery lifetime has become the biggest limited of mobile smart-terminal, offloading of mobile computing is a potential effective method to extend the battery lifetime of mobile smart-terminal by executing some computation of applications in remote servers. However, the delay of transmission and the wireless transmission conditions are the main constraints of mobile offloading. The development of HetNets (Heterogeneous Networks) brings high speed and convenient wireless access, which will make the mobile computing offloading more easy. In this paper, the offloading of mobile computing is discussed based on HetNets, and an energy-optimal offloading algorithm of mobile computing is proposed to achieve the maximum saving energy of the mobile terminal under the requirement of given application execution time. First, the mathematical model of the mobile computation offloading is given. The optimal algorithm based on Combinatorial Optimization can get the optimal saving energy and the energy saving of it in the simulation is bounced around 43%. The performance of suboptimal algorithm is very close to the optimal solution but the time complexity is just O(N). Simulation results also show the performance of different algorithms and relation between saving energy and different wireless conditions.
Cao et al. (Thu,) studied this question.
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