Fully Exploiting Cloud Computing to Achieve a Green and Flexible C-RAN
Fully Exploiting Cloud Computing to Achieve a Green and Flexible C-RAN
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DOI：
10.1109/mcom.2017.1600922
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发表时间：
2017-11
影响因子：
11.2
通讯作者：
Jianhua Tang;Ruihan Wen;Tony Q. S. Quek;M. Peng
中科院分区：
文献类型：
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作者：
Jianhua Tang;Ruihan Wen;Tony Q. S. Quek;M. Peng
通过将云计算合并到 RAN 中，C-RAN 被视为未来的 5G 无线系统架构。由于将基带处理功能迁移到集中式云基带单元池的创新举措，C-RAN有望大幅降低能耗，成为绿色RAN。此外，通过基于云的架构，可以集成许多新功能和RAN设计，这将RAN重新定义为灵活的RAN。在本文中，我们回顾了利用云计算从两个基于云的属性（集中处理和软件定义环境）形成绿色灵活的 C-RAN 的最新进展。对于集中处理属性，我们将协调多点和有限前传容量、组播和 C-RAN 中的 CSI 问题纳入其中。对于软件定义的环境属性，我们总结了弹性服务扩展、功能拆分和功能扩展。我们还包括一些最近的研究成果，并讨论了一些开放的挑战。
By merging cloud computing into the RAN, C-RAN has been foreseen as a prospective 5G wireless systems architecture. Due to the innovative move of migrating the baseband processing functionalities to the centralized cloud baseband unit pool, C-RAN is anticipated to reduce energy consumption significantly to be a green RAN. Moreover, with the cloud-based architecture, lots of new functionalities and RAN designs are ready to be incorporated, which redefines the RAN as a flexible RAN. In this article, we review the recent advances of exploiting cloud computing to form a green and flexible C-RAN from two cloud-based properties: centralized processing and the software-defined environment. For the centralized processing property, we include coordinated multipoint and limited fronthaul capacity, multicasting, and CSI issues in C-RAN. For the software-defined environment property, we summarize elastic service scaling, functionality splitting, and functionality extension. We also include some of our recent research results and discuss several open challenges.