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arXiv 2102.13192cs.NI
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PlaceRAN:下一代无线接入网中虚拟化网络功能的优化配置

PlaceRAN: Optimal Placement of Virtualized Network Functions in the Next-generation Radio Access Networks

Fernando Zanferrari Morais, Gabriel Matheus de Almeida, Leizer Pinto, Kleber Vieira Cardoso, Luis M. Contreras, Rodrigo da Rosa Righi, Cristiano Bonato Both

摘要:

第五代移动演进实现了下一代无线电接入网络(NG-RAN)上的若干转换。RAN协议栈被分成八个可能的分解选项,其被组合成三个网络单元,即,中央、分布式和无线电。除此之外,进一步的进步允许RAN软件在通用供应商中立硬件之上虚拟化,处理虚拟化RAN(vRAN)的概念。分散的网络单元倡议基于开放RAN(O-RAN)实现完全的互操作性。NG-RAN和vRAN的结合产生了vNG-RAN,从而能够将分散的单元和协议作为一组无线电功能进行管理。这些功能的放置是具有挑战性的,因为最好的决策可以基于多个约束,如RAN协议栈分割,传输网络的路由路径与有限的带宽和延迟要求,不同的拓扑结构和链路能力,不对称的计算资源,本文提出了第一个精确的模型,用于无线电功能的放置优化的vNG-RAN规划,命名为PlaceRAN。主要目标是最小化计算资源,最大化无线电功能的聚合。PlaceRAN评估考虑了两种现实的网络拓扑。我们的研究结果表明,PlaceRAN模型实现了优化的高性能聚合水平,它是灵活的RAN部署克服网络限制,它是最先进的vNG-RAN设计和开发的最新。

英文摘要:

The fifth-generation mobile evolution enables several transformations on Next Generation Radio Access Networks (NG-RAN). The RAN protocol stack is splitting into eight possible disaggregated options combined into three network units, i.e., Central, Distributed, and Radio. Besides that, further advances allow the RAN software to be virtualized on top of general-purpose vendor-neutral hardware, dealing with the concept of virtualized RAN (vRAN). The disaggregated network units initiatives reach full interoperability based on the Open RAN (O-RAN). The combination of NG-RAN and vRAN results in vNG-RAN, enabling the management of disaggregated units and protocols as a set of radio functions. The placement of these functions is challenging since the best decision can be based on multiple constraints, such as the RAN protocol stack split, routing paths of transport networks with restricted bandwidth and latency requirements, different topologies and link capabilities, asymmetric computational resources, etc. This article proposes the first exact model for the placement optimization of radio functions for vNG-RAN planning, named PlaceRAN. The main objective is to minimize the computing resources and maximize the aggregation of radio functions. The PlaceRAN evaluation considered two realistic network topologies. Our results reveal that the PlaceRAN model achieves an optimized high-performance aggregation level, it is flexible for RAN deployment overcoming the network restrictions, and it is up to date with the most advanced vNG-RAN design and development.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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