核心网NFV规划建设

doi:10.11959/j.issn.1000-0801.2015369

Abstract

Abstract:

In September 2015,China Mobile launched a pilot project of NFV network,and applied NFV framework for the construction of“the new call”,“the new message”platform in the converged communications project.NFV is the integration of IT and CT,and combined their characteristics during planning and construction; but due to the fact that this technology is not yet mature,there are some problems gradually exposed in the planning and construction of the current NFV network.Based on the experience of several China Mobile's NFV projects,the key problems in NFV planning and construction were discussed and summarized.

Key words: NFV, NFVI, RCS, MANO

Lei SHEN,Lihua WU. Planning and construction for the NFV of core network[J]. Telecommunications Science, 2015, 31(Z1): 153-157.

主要因素	方案1（单厂商）	方案2（共享资源池）	方案3（硬件独立）	方案4（三层全解耦）
能否发挥云化优势	部分	是	是	是
部署难度	易	难（不同厂商上层功能网元对虚拟层要求不同）	较易	难（原因同方案2）
运维难度	易	难（性能、可靠性存在问题）	较易	难（原因同方案2）
厂商支持情况	全支持	诺基亚西门子、阿尔卡特-朗讯支持	全支持	不反对，但不积极

对比项	刀片服务器	机架服务器	结论
计算密度	一般使用2P刀片，4P的也有，但成本较高	一般使用2U高度2P,1U高度2P的也有，但是成本较高	刀片服务器的计算密度高于机架
存储密度	一般一个2P刀片2个硬盘	2U服务器有8～24个硬盘	机架服务器的存储密度高于刀片
运行效率	机框内刀片共享风扇、电源、网络等部件	每个服务器有自己的电源、风扇、网络件	刀片服务器共享了很多部件，运行功耗更低、占地更少
网络能力	机框内有交换板完成网络交换，集中对外出线，刀片间共享框内网络和机框对外接口	每个服务器单独对外出线，需要外部交换机做交换	刀片服务器的网络能力共享，共享度更高，网络能力更强
可靠性	刀片服务器为各厂商高端产品，在可靠性设计、选材方面的要求更高，可靠性试验、认证方面更全面	机架式服务器为各厂商主流产品，厂商多，门槛低，竞争激烈，成本优先	一般认为刀片式服务器的可靠性更高
网络扩展性	在已有系统上增加网络，只需在交换板上新插线缆，软件配置流量分配到新的端口上即可	机架式服务器的网卡数量固定，线缆连接固定，新增网络（独立出线）要求所有服务器增加网卡和网线	刀片服务器新增网络（要求独立出线）时明显占优，只需要每个机框增加线

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Planning and construction for the NFV of core network

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