Switching delay aware computing resource allocation in virtualized Base Station

In centralized cellular network architecture, the concept of virtualized Base Station (VBS) becomes attracting since it enables all base stations (BSs) to share computing resources in a dynamic manner. This can significantly improve the utilization efficiency of computing resources. In this paper, we study the computing resource allocation strategy for one VBS by considering the non-negligible effect of delay introduced by switches. Specifically, we formulate the VBS's sum computing rate maximization as a set optimization problem. To address this problem, we firstly propose a computing resource schedule algorithm, namely, weight before one-step-greedy (WB-OSG), which has linear computation complexity and considerable performance. Then, OSG retreat (OSG-R) algorithm is developed to further improve the system performance at the expense of computational complexity. Simulation results under practical setting are provided to validate the proposed two algorithms.