SDN/NFV下的5G网络资源切片管理机制

5G Network Resource Slice Management Mechanism in Software-defined Networking/Network Function Virtualization

网络切片是伴随着第五代移动通信网络而产生的新型网络组织形式,以低成本、高效率的方式实现对未来多样化的5G使用场景的支持,而如何高效分配底层网络资源以实现5G网络切片已成为当前研究热点.为了优化5G网络切片的资源调度,本文为网络切片的不同阶段设计了相应的资源管理策略,包括切片创建、调整和回收机制.切片创建机制采用粒子群算法和差分进化算法优化切片初始构造方案;切片调整机制通过获取实时性能监测结果,选择调整方案优化切片结构;切片延迟回收策略对失效切片进行复用,优化系统响应时间.结果表明,在请求到达率和平均性能偏差方面,提出的资源管理机制对比另外3种机制呈现出明显的优势,证实了该机制的有效性和可用性.

Network slicing is a new form of network organization that accompanies the fifth-generation mobile communication network,which has the ability to support future diversified 5G usage scenarios in a low-cost and efficient manner,thus how to allocate the underlying network resources to achieve 5G Network slicing efficiently has become a hot research topic.In order to optimize the resource scheduling process of 5G network slice,this paper proposes corresponding resource management strategies for different stages of network slices,including slice creation,slice adjustment and slice recycling mechanisms,among which,the slice creation mechanism uses particle swarm optimization and differential evolution algorithm to optimize the initial construction scheme of the slice;the slice adjustment mechanism selects the adjustment scheme to optimize the slice structure by obtaining real-time performance monitoring results;the slice delay recovery strategy reuses the failed slices to optimize the response time of the system.The results show that,the proposed resource management mechanism has obvious advantages over the other three mechanisms compared in terms of request arrival rate and average performance deviation,confirming the effectiveness and availability of our mechanism.