摘要
阐述了5G移动网的架构演变对承载网的影响,对5G前传网和固定宽带接入网的光纤需求做了对比,阐述了光纤稀缺地区5G前传的各种承载方案,概述了各种设备组网方案的特点,分析了5G核心网下沉至城域核心DC和边缘DC对承载网架构和带宽的影响,给出了移动城域网中传和回传网络的带宽计算模型,对网络各层的带宽进行了计算。计算结果表明,相对于4G网络,5G网络无线侧带宽的增大使得对承载网回传带宽的需求大大增加,但核心网的下沉以及CDN和MEC的部署,减缓了回传和城域出口的带宽增长趋势。
The influence of 5G mobile network architecture evolution on bearer network was demonstrated. A comparison of fiber requirement between 5G front-haul network and fixed broadband access network was proposed. The various bearer schemes in fiber shortage area were introduced. The characteristics of various device networking solution were summarized. The influence on bearer network architecture and bandwidth was analyzed when 5G core network moved down to the metro core DC and metro edge DC. The bandwidth calculation model on mobile metro mid-haul and back-haul network was presented. Bandwidth calculations on each layer of the networks were provided. Calculation results show that compared with 4G network, bandwidth requirements on bearer back-haul network are greatly increased as the bandwidth of the wireless side of the 5G network increases. The growth trend of the metro back-haul and export bandwidth is slowed down with the core network moving down and the deployment of CDN and MEC.
作者
赵春华
ZHAO Chunhua(Guangdong Planning and Designing Institute of Telecommunications Co.,Ltd.,Guangzhou 510630,China)
出处
《电信科学》
2019年第2期79-83,共5页
Telecommunications Science
关键词
承载网
5G
回传
带宽
bearer network
5G
back-haul
bandwidth
作者简介
赵春华(1969-),男,博士,广东省电信规划设计院有限公司高级工程师、技术总监、注册咨询工程师,主要研究方向为传送与接入网、IP网、5G承载网和电信网的网络转型。
