摘要
研究了未来移动通信网络切片机制,针对LTE系统下行在基站内建立媒体接入控制(MAC)层流级别的切片调度器,使得运营商之间可以按照预设比例共享资源。运营商作为切片的拥有者可以根据不同的服务等级协议(SLA)来对其资源比例进行设定。比较固定切片与网络虚拟化基片(NVS)框架下切片的资源块利用率,进行了系统级仿真实验。相对于固定切片方法,NVS方法在不同切片间用户相互隔离的情况下有更好的资源利用率。此外,针对实时(RT)业务和非实时(NRT)业务在时延上的差异建立业务切片,定制化地选择其调度算法策略,从而在降低分组丢失率的同时提升整个系统的性能。
The future mobile communication network slicing mechanism was studied. A slice scheduler of flow level in medium access control （MAC） layer within the base station was used to utilize the shared resources between operators by predetermined proportion in the downlink LTE system. According to the different service level agreement parameters, the wireless resources are allocated for operators, which is the owner of slices in wireless network virtualization. System level simulation experiment and the comparison of the utilization between different slice methods were carried out. Compared to fixed slice method, the NVS method ensures that the users in different slices can achieve better utilization of wireless resources. In addition, the slices for services were established according to the difference of real-time （RT） and non-real-time （NRT） traffic requests, which minimizes the packet loss rate and ensures performance of the whole system.
出处
《电信科学》
北大核心
2017年第2期66-72,共7页
Telecommunications Science
基金
国家自然科学基金资助项目(No.61431001)~~
关键词
网络切片
虚拟化技术
资源分配
network slice, virtualization technology, resource allocation
