radio access networks
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Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8173
Author(s):  
Marcin Dryjański ◽  
Łukasz Kułacz ◽  
Adrian Kliks

The development of cellular wireless systems has entered the phase when 5G networks are being deployed and the foundations of 6G solutions are being identified. However, in parallel to this, another technological breakthrough is observed, as the concept of open radio access networks is coming into play. Together with advancing network virtualization and programmability, this may reshape the way the functionalities and services related to radio access are designed, leading to modular and flexible implementations. This paper overviews the idea of open radio access networks and presents ongoing O-RAN Alliance standardization activities in this context. The whole analysis is supported by a study of the traffic steering use case implemented in a modular way, following the open networking approach.


Author(s):  
Hayssam Dahrouj ◽  
Ahmed Douik ◽  
Mohammed El-Hajjar ◽  
Megumi Kaneko ◽  
Yonghui Li ◽  
...  

2021 ◽  
Author(s):  
Mehrangiz Ensan ◽  
Hamdi Joudeh ◽  
Alex Alvarado ◽  
Ulf Gustavsson ◽  
Frans M. J. Willems

2021 ◽  
Author(s):  
Niwei Wang ◽  
Tengwei Wang ◽  
Xuekun Han ◽  
Xiaofan Xu ◽  
Guo Li

2021 ◽  
Vol 25 ◽  
Author(s):  
Luis Felipe Ariza-Vesga ◽  
Johan Sebastian Eslava-Garzon

The objective of this paper is to extend into the OpenAirInterface platform the Coordinated Scheduling (CS) technique to allocate resource blocks among User Equipment (UE) in a wisely way and to control the energy efficiency, the throughput, and the inter-cell interference for Cloud Radio Access Networks (C-RANs). It is achieved by modifying the OpenAirInterface scheduler code, increasing the Remote Radio Unit (RRU) scalability, and employing some component carriers of the Radio Cloud Center (RCC), each one them with one or more UEs. The hardware utilized is composed of general-purpose processors and fast Ethernet transport ports, and the software is recent frequency-domain methodologies in a software-only environment where the use of radio units are not required. However, the USRP B200 mini-i radio unit and the UE (Samsung Galaxy S8) were considered only for validation purposes. The emulations using frequency-domain methodologies, compatible with fourth and fifth-generation cellular systems, allowed real-time emulations and reduced 10-fold the multipath channel’s signal processing complexity compared to time-domain methodologies. The results show we can emulate a real-time static coordinated scheduling proof-of-concept for one C-RAN composed of one RCC, three RRUs, and three UEs. In the end, it is evaluated the reproducibility and the scalability of synthetic networks composed of one RRU and at least one UE, without using software-defined radio units, reducing prototyping uncertainties of the physical hardware and the total price of the experiment.


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