基于业务类型的网络切片可靠性映射算法

Reliability Mapping Algorithm for Network Slicing Based on Service Type

网络切片是5G网络的基础架构技术,为在多个切片共享同一底层网络资源的同时保证切片的可靠性,提出一种区分业务类型的网络切片可靠性映射算法,解决底层网络链路故障、网络切片可靠性与资源利用率相互矛盾的问题。通过区分切片承载业务类型,对高可靠低时延切片请求的链路提前构建备份路径,并采用基于最大生成树链路的备份资源共享保护方法,对高带宽切片请求则采用基于链路可靠性的重映射算法恢复故障链路。仿真结果验证了该算法的有效性,与SVNE1+1和DPS-VNRA算法相比,其在切片成功运行率、长期收益开销比、物理链路利用率和故障恢复率方面均具有优势。

Network slicing is the basic architecture technology of 5G networks.In order to ensure the reliability of slices sharing the same underlying network resources,a reliability mapping algorithm for network slicing that distinguishes service types is proposed to solve the conflicts between the underlying network link failures,network slicing reliability and resource utilization.By distinguishing the types of services that slices bear,a backup path is constructed in advance for the links requested by high-reliability and low-latency slices.The backup resource sharing protection method based on maximum spanning tree link is adopted,and the remapping algorithm based on link reliability is adopted for the request of high-bandwidth slices.In this way,the failed link can be restored.The simulation results verify the effectiveness of the algorithm,and its advantages over SVNE1+1 and DPS-VNRA algorithms in the successful operation rate of slices,ratio of long-term benefits to costs,physical link utilization rate,and failure restoration rate.