Packet forwarding for heterogeneous technologies for integrated fronthaul/backhaul

Thomas J Deiss, Luca Cominardi, Andres Garcia-Saavedra, P. Iovanna, G. Landi, Xi Li, J. Mangues‐Bafalluy, José Núñez-Martínez, A. D. Oliva
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引用次数: 5

Abstract

To meet the future mobile user demand at a reduced cost, operators are looking at solutions such as C-RAN and different functional splits to decrease the cost of deploying and maintaining cell sites. The use of these technologies forces operators to manage two physically separated networks, one for backhaul and one for fronthaul. To solve this issue, transport networks for 5G will carry both fronthaul and backhaul traffic operating over heterogeneous data plane technologies. Such an integrated fronthaul/backhaul (denoted as 5G-Crosshaul) transport network will be software-controlled to adapt to the fluctuating capacity demand of the new generation air interfaces. Based on a proposed data- and control-plane architecture for 5G-Crosshaul, we propose a frame format common to both fronthaul and backhaul traffic as well as a corresponding abstraction of the forwarding behavior of the network elements. The common frame format and the forwarding abstraction define the information to be exchanged at the southbound interface (SBI) of the 5G-Crosshaul Control Infrastructure (XCI). This paper derives requirements for the SBI from 5G use cases.
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综合前传/回程异构技术的分组转发
为了以更低的成本满足未来移动用户的需求,运营商正在寻找诸如C-RAN和不同功能拆分的解决方案,以降低部署和维护蜂窝站点的成本。这些技术的使用迫使运营商管理两个物理上分离的网络,一个用于回程,一个用于前传。为了解决这个问题,5G的传输网络将在异构数据平面技术上同时承载前传和回程流量。这种前传/回程(表示为5G-Crosshaul)集成传输网络将采用软件控制,以适应新一代空中接口波动的容量需求。基于提出的5g交叉通信的数据和控制平面架构,我们提出了一种前传和回程流量通用的帧格式,以及相应的网络元素转发行为抽象。通用帧格式和转发抽象定义了5g交叉通信控制基础设施(XCI)南向接口(SBI)上要交换的信息。本文从5G用例中推导出对SBI的需求。
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