能耗和时延感知的虚拟化云无线接入网络资源分配机制

Energy Consumption and Delay-aware Resource Allocation Mechanism for Virtualization Cloud Radio Access Network

针对现有虚拟化云无线接入网络(C-RAN)资源利用率低、能耗高、用户服务质量无法得到保证等问题,该文提出一种能耗和时延感知的虚拟化资源分配机制。根据虚拟化C-RAN的网络特点及业务流量特征,考虑资源约束和比例公平,建立能耗和时延优化模型。进而,利用启发式算法为不同类型虚拟C-RAN和用户虚拟基站分配资源,完成资源的全局优化配置。仿真结果表明,所提资源分配机制在提高网络资源利用率的同时,不但使能耗节省了62.99%,还使时延降低了32.32%。

To solve the problems of low resource utilization rate,high energy consumption and poor user service quality in the existing virtualized Cloud Radio Access Network(C-RAN),a virtual resource allocation mechanism based on energy consumption and delay is proposed.According to the network and traffic characteristics of the virtualized C-RAN,considering the resource constraints and proportional fairness,an energy consumption and delay optimization model is established.Furthermore,a heuristic algorithm is used to allocate resources for different types of virtual C-RAN and user virtual base stations to complete resource global optimization configuration.Simulation results show that the proposed resource allocation mechanism can effectively save energy by 62.99%and reduce the latency by 32.32%while improving the network resource utilization.