Impact of RAN centralization on 5G Access-Aggregation Networks
New Technology Building 1012 lecture hall
AchillePattavina received the Dr. Eng. degree in Electronic Engineering from University of Rome (Italy) in 1977. He was with the same University until 1991, when he moved to “Politecnico di Milano”, Milano (Italy), where he is Full Professor since 1995. He has been author/coauthor of more than 300 papers in the area of communications systems and networks published in leading international journals/conferences and of two books: Switching Theory, Architectures and Performance in Broadband ATM Networks (New York: Wiley, 1998), Communication Network: Networking and Internets (McGraw-Hill, 2nd ed., 2007, in Italian). He has been coordinator of national and international research activities, including European Union funded projects. He has served in the Editorial Board of many IEEE/non-IEEE international journals. He has been Editor for Switching Architecture Performance of the IEEE Transactions on Communications from 1994 to 2011 and Editor-in-Chief of the Wiley European Transactions on Telecommunications from 2001 to 2010. He has been Technical Program Chair/CoChair of many international conferences. He is a Senior Member of the IEEE Communications Society. His current research interests are in the areas of green ICT and cloud computing, software defined networking, optical networks, switching theory, traffic modelling and broadband convergent access/metro networks.
5G mobile networks are expected to meet a set of extremely‐challenging performance requirements, in terms of enhanced throughput, increased overage, reduced latency and power consumption. To meet such requirements, a promising solution for future 5G networks is the recently proposed Centralized‐Radio Access Network (C‐RAN), supported by optical aggregation based on Wavelength Division Multiplexing. C‐RAN is expected to provide significant CapEx/OpEx savings, deriving from the consolidation of processing facilities among different Digital Units (DU). However, the adoption of C‐RAN requires transporting large amount of high and constant‐bit‐rate traffic between DUs and Radio Units (RU), called the fronthaul traffic. Therefore, in view of the massive small cells deployment and traffic increase envisioned for 5G, fronthaul transport is expected to face serious scalability issues. Thus, alternative midhaul RAN splits are now under analysis to reduce the required network capacity. We first perform an analysis of 5G traffic forecasts, considering different RAN splits and cell‐site antenna configurations. Then, we compare different baseband‐processing placement strategies to find proper trade‐off between baseband‐resources consolidation and network blocking.
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