Power Consumption Minimization in Cache-Enabled Mobile Networks

摘要

Caching at base stations (BSs) can enhance the performance of a mobile network, which has gained much attention in the past few years. In this paper, we investigate the energy-saving issue in the cache-enabled mobile network, where we try to minimize the total system power consumption with limited radio resource and storage capacity of the BSs. We decouple the formulated difficult optimization task into a series of tractable subproblems and develop efficient algorithms to solve them with reasonable computation load. The key idea of our proposed scheme is to associate as many as possible users with the BSs that have stored the users' requested files in their caches while considering the spectrum and power budgets of the BSs. Numerical results show our proposed scheme can significantly reduce the system power consumption compared with others.