可擴充上行軟體實體層於雲端無線網路架構

Scalable Uplink of Soft PHY in a Cloud-RAN

楊博翔(Bo-Siang Yang)

指導教授 ： 許騰尹

國立交通大學/資訊學院/資訊科學與工程研究所/碩士(2020年)

摘要

為了提高網路連線速率、降低網路延遲以及提供多天線連結運算，第五代行動通訊技術(5th Generation Mobile Networks, 5G)正在不斷地開發，並提出新的規範，相較於以往PHY Layer使用硬體實作，軟體化實體層(Soft PHY)能針對不斷更新的5G規範提供更具彈性的架構。
然而，相較於以往PHY Layer的硬體設計，Soft PHY在運算效率上仍有優化的空間。本研究主要提出可擴充上行Soft PHY，目的是為了因應未來Cloud-RAN技術，需要軟體化與虛擬化至多台伺服器上運行，以突破Soft PHY在上行運算時受單一伺服器硬體資源的限制。
本論文將著重於PHY Layer Uplink程式的模組化(Modularization)，並以分散式運算架構的開發來驗證其正確性，使Soft PHY上行運算能夠擁有更高的可擴充性來彈性使用額外的硬體資源，提供更佳的運算能力。

關鍵字

軟體實體層 ； 無線網路存取架構 ； 集中無線網路存取架構 ； 雲端無線網路存取架構 ； 分散式運算架構 ； 模組化

並列摘要

To enhance the throughput, reduce the latency and support multi-antenna Processing. 5th Generation Mobile Networks has developed in full swing and keeps releasing new specification. Compared with hardware-design physical layer (PHY), software-design PHY (Soft PHY) becomes more flexible to match up with the specification from 5G.
However, Soft PHY still has lots of space to improve. In this paper, we propose scalable Uplink Soft PHY for virtualizing the computation to multiple servers in Cloud-RAN. In order to break the limitation of computing resources on single server.
To enhance the scalability of Soft PHY Uplink that can lead to high computational capacity, this paper focuses on the modularization of Soft PHY Uplink and verify the correctness using distributed computing architecture of Soft PHY.

並列關鍵字

Soft-PHY ； RAN ； C-RAN ； Cloud-RAN ； Distributed Computing ； Modularization

參考文獻

[1] 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding (Release 12)

[2] Mobile, China. "C-RAN: the road towards green RAN." White paper, ver 2 (2011): 1-10.

[3] Nikaein, Navid, et al. "Towards a cloud-native radio access network." Advances in Mobile Cloud Computing and Big Data in the 5G Era. Springer, Cham, 2017. 171-202.

[4] Wubben, Dirk, et al. "Benefits and impact of cloud computing on 5G signal Processing: Flexible centralization through cloud-RAN." IEEE signal Processing magazine 31.6 (2014): 35-44.

[5] Larsson, Erik G., et al. "Massive MIMO for next generation wireless systems." IEEE communications magazine 52.2 (2014): 186-195.