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46 Results Found

  • Article
  • Open Access
15 Citations
4,660 Views
25 Pages

Fronthaul Design for Wireless Networks

  • Ivo Sousa,
  • Nuno Sousa,
  • Maria Paula Queluz and
  • António Rodrigues

10 July 2020

Cloud Radio Access Network (C-RAN) architectures have arisen as an alternative to traditional wireless network architectures, notably by taking advantage of the functional split between the multiple distributed Remote Radio Heads (RRHs) and the centr...

  • Article
  • Open Access
17 Citations
4,383 Views
17 Pages

Mitigation of Nonlinear Distortions for a 100 Gb/s Radio-Over-Fiber-Based WDM Network

  • Saifur Rahman,
  • Farman Ali,
  • Adrian Smagor,
  • Fazal Muhammad,
  • Usman Habib,
  • Adam Glowacz,
  • Shabbir Ahmad,
  • Muhammad Irfan,
  • Albert Smalcerz and
  • Salim Nasar Faraj Mursal
  • + 1 author

29 October 2020

Next-generation cloud radio access networks (C-RANs) are anticipated to provide multi-Gbps data rate transmission and ultra-high bandwidth capacity, which is one of the key performance indicators for future mobile networks. The integral layout of fib...

  • Article
  • Open Access
15 Citations
4,352 Views
22 Pages

27 February 2020

With the increasing number of Internet of Things (IoT) devices, a huge amount of latency-sensitive and computation-intensive IoT applications have been injected into the network. Deploying mobile edge computing (MEC) servers in cloud radio access net...

  • Article
  • Open Access
2 Citations
2,894 Views
23 Pages

System-Level Assessment of Low Complexity Hybrid Precoding Designs for Massive MIMO Downlink Transmissions in Beyond 5G Networks

  • João Pedro Pavia,
  • Vasco Velez,
  • Nuno Souto,
  • Marco Ribeiro,
  • Pedro Sebastião and
  • Américo Correia

9 March 2022

The fast growth experienced by the telecommunications field during the last few decades has been motivating the academy and the industry to invest in the design, testing and deployment of new evolutions of wireless communication systems. Terahertz (T...

  • Feature Paper
  • Article
  • Open Access
5 Citations
2,235 Views
18 Pages

Congestion Probabilities in a Multi-Cluster C-RAN Servicing a Mixture of Traffic Sources

  • Iskanter-Alexandros Chousainov,
  • Ioannis D. Moscholios and
  • Panagiotis G. Sarigiannidis

11 December 2020

A multi-cluster cloud radio access network (C-RAN) is considered in this paper where the remote radio heads (RRHs) form different clusters. A cluster includes RRHs that have the same radio resource unit capacity. In addition, all RRHs are separated f...

  • Review
  • Open Access
56 Citations
7,995 Views
32 Pages

9 May 2020

Cloud radio access network (C-RAN) is a promising mobile wireless sensor network architecture to address the challenges of ever-increasing mobile data traffic and network costs. C-RAN is a practical solution to the strict energy-constrained wireless...

  • Feature Paper
  • Article
  • Open Access
4 Citations
4,990 Views
14 Pages

14 November 2017

The downlink of symmetric Cloud Radio Access Networks (C-RANs) with multiple relays and a single receiver is studied. Lower and upper bounds are derived on the capacity. The lower bound is achieved by Marton’s coding, which facilitates dependence amo...

  • Article
  • Open Access
3 Citations
3,796 Views
12 Pages

C-RAN Traffic Aggregation on Latency-Controlled Ethernet Links

  • Federico Tonini,
  • Bahare Masood Khorsandi,
  • Steinar Bjornstad,
  • Raimena Veisllari and
  • Carla Raffaelli

18 November 2018

Centralized/Cloud Radio Access Networks (C-RAN) are deployed in converged fixed-mobile networks to exploit the flexibility coming from joint application of Network Function Virtualization (NFV) and Software Defined Networking (SDN). In this context,...

  • Article
  • Open Access
7 Citations
4,027 Views
15 Pages

24 April 2019

In modern implementations of Cloud Radio Access Network (C-RAN), the fronthaul transport network will often be packet-based and it will have a multi-hop architecture built with general-purpose switches using network function virtualization (NFV) and...

  • Article
  • Open Access
13 Citations
6,478 Views
14 Pages

Scalable Edge Computing Deployment for Reliable Service Provisioning in Vehicular Networks

  • Federico Tonini,
  • Bahare M. Khorsandi,
  • Elisabetta Amato and
  • Carla Raffaelli

The global connected cars market is growing rapidly. Novel services will be offered to vehicles, many of them requiring low-latency and high-reliability networking solutions. The Cloud Radio Access Network (C-RAN) paradigm, thanks to the centralizati...

  • Article
  • Open Access
9 Citations
2,859 Views
17 Pages

Joint Optical and Wireless Resource Allocation for Cooperative Transmission in C-RAN

  • Peng Yang,
  • Liao Chen,
  • Hong Zhang,
  • Jing Yang,
  • Ruyan Wang and
  • Zhidu Li

31 December 2020

Cooperative multipoint transmission (CoMP) is one of the most promising paradigms for mitigating interference in cloud radio access networks (C-RAN). It allows multiple remote radio units (RRUs) to transmit the same data flow to a user to further imp...

  • Article
  • Open Access
1,911 Views
18 Pages

Multiservice Loss Models in C-RAN Supporting Compound Poisson Traffic

  • Iskanter-Alexandros Chousainov,
  • Ioannis Moscholios,
  • Panagiotis Sarigiannidis and
  • Michael Logothetis

In this paper, a cloud radio access network (C-RAN) is considered where the baseband units form a pool of computational resource units (RUs) and are separated from the remote radio heads (RRHs). The RRHs are grouped into clusters based on their capac...

  • Article
  • Open Access
8 Citations
5,145 Views
17 Pages

15 July 2019

Cloud radio access networks (C-RANs) are emerging architectural solutions to anticipate the increased capacity and quality demands of future 5G cellular networks at a reduced cost. In C-RANs, a transport segment referred to as fronthaul has been defi...

  • Article
  • Open Access
29 Citations
6,265 Views
27 Pages

Non-Orthogonal eMBB-URLLC Radio Access for Cloud Radio Access Networks with Analog Fronthauling

  • Andrea Matera,
  • Rahif Kassab,
  • Osvaldo Simeone and
  • Umberto Spagnolini

2 September 2018

This paper considers the coexistence of Ultra Reliable Low Latency Communications (URLLC) and enhanced Mobile BroadBand (eMBB) services in the uplink of Cloud Radio Access Network (C-RAN) architecture based on the relaying of radio signals over analo...

  • Article
  • Open Access
5 Citations
2,687 Views
31 Pages

19 October 2023

With the advent of 5G networks, the demand for improved mobile broadband, massive machine-type communication, and ultra-reliable, low-latency communication has surged, enabling a wide array of new applications. A key enabling technology in 5G network...

  • Article
  • Open Access
2 Citations
2,787 Views
23 Pages

3 September 2019

This work addresses the joint design of fronthaul and edge links for a cache-aided cloud radio access network (C-RAN) system with a wireless fronthaul link. Motivated by the fact that existing techniques, such as C-RAN and edge caching, come at the c...

  • Article
  • Open Access
20 Citations
7,041 Views
15 Pages

6 July 2018

In this paper, we propose a novel method for low-latency 10-Gigabit-capable symmetric passive optical network (XGS-PON) mobile front-haul for small cell cloud radio access network (C-RAN) based on traffic estimation. In this method, the number of pac...

  • Article
  • Open Access
5 Citations
3,026 Views
24 Pages

System-Level Assessment of a C-RAN based on Generalized Space–Frequency Index Modulation for 5G New Radio and Beyond

  • Vasco Velez,
  • João Pedro Pavia,
  • Catarina Rita,
  • Carolina Gonçalves,
  • Nuno Souto,
  • Pedro Sebastião and
  • Américo Correia

2 February 2022

Index modulation (IM) has been attracting considerable research efforts in recent years as it is considered a promising technology that can enhance spectral and energy efficiency and help cope with the rising demand of mobile traffic in future wirele...

  • Article
  • Open Access
16 Citations
4,263 Views
18 Pages

27 May 2023

The 5G network is designed to serve three main use cases: enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable and low-latency communications (uRLLC). There are many new technological enablers, including th...

  • Article
  • Open Access
27 Citations
5,235 Views
13 Pages

Multi-Agent Team Learning in Virtualized Open Radio Access Networks (O-RAN)

  • Pedro Enrique Iturria-Rivera,
  • Han Zhang,
  • Hao Zhou,
  • Shahram Mollahasani and
  • Melike Erol-Kantarci

19 July 2022

Starting from the concept of the Cloud Radio Access Network (C-RAN), continuing with the virtual Radio Access Network (vRAN) and most recently with the Open RAN (O-RAN) initiative, Radio Access Network (RAN) architectures have significantly evolved i...

  • Article
  • Open Access
1 Citations
2,078 Views
18 Pages

Multiservice Loss Models in Single or Multi-Cluster C-RAN Supporting Quasi-Random Traffic

  • Iskanter-Alexandros Chousainov,
  • Ioannis Moscholios,
  • Panagiotis Sarigiannidis and
  • Michael Logothetis

15 September 2021

In this paper, a cloud radio access network (C-RAN) is considered where the baseband units form a pool of computational resource units and are separated from the remote radio heads (RRHs). Based on their radio capacity, the RRHs may form one or many...

  • Article
  • Open Access
446 Views
15 Pages

27 October 2025

In this study, we developed an energy-efficient multi-user-associated optimization method involving a massive multi-input multi-output (M-MIMO) system-enabled Cloud Radio Access Network (C-RAN) in Full-Duplex (FD) mode. Maximization of energy efficie...

  • Article
  • Open Access
3 Citations
3,865 Views
21 Pages

Protecting Physical Communications in 5G C-RAN Architectures through Resonant Mechanisms in Optical Media

  • Borja Bordel Sánchez,
  • Ramón Alcarria,
  • Tomás Robles and
  • Antonio Jara

23 July 2020

Future 5G networks are characterized by three basic ideas: enhanced mobile broadband communications, massive machine-type communications, and ultra-low-latency communications. Any of these requirements needs, to be fulfilled, the implementation of hi...

  • Article
  • Open Access
5 Citations
2,775 Views
19 Pages

Rateless Coded Uplink Transmission Design for Multi-User C-RAN

  • Yu Zhang,
  • Jiali Xu,
  • Hong Peng,
  • Weidang Lu and
  • Zhaoyang Zhang

5 July 2019

Cloud radio access network (C-RAN) is a promising technology for the Internet of Things (IoT). In C-RAN, the remote radio head (RRH) and baseband unit (BBU) in the conventional base station are separated, and each BBU is backward centralized into a v...

  • Review
  • Open Access
1 Citations
1,676 Views
39 Pages

Enabling Green Cellular Networks: A Review and Proposal Leveraging Software-Defined Networking, Network Function Virtualization, and Cloud-Radio Access Network

  • Radheshyam Singh,
  • Line M. P. Larsen,
  • Eder Ollora Zaballa,
  • Michael Stübert Berger,
  • Christian Kloch and
  • Lars Dittmann

The increasing demand for enhanced communication systems, driven by applications such as real-time video streaming, online gaming, critical operations, and Internet-of-Things (IoT) services, has necessitated the optimization of cellular networks to m...

  • Article
  • Open Access
2 Citations
3,210 Views
22 Pages

17 February 2020

Since the cloud radio access network (C-RAN) transmits information signals by jointly transmission, the multiple copies of information signals might be eavesdropped on. Therefore, this paper studies the resource allocation algorithm for secure energy...

  • Feature Paper
  • Article
  • Open Access
3 Citations
2,857 Views
14 Pages

15 May 2020

Despite the potential benefits of reducing system costs and improving spectral efficiency, it is challenging to implement cloud radio access network (C-RAN) systems due to the performance degradation caused by finite-capacity fronthaul links and inte...

  • Article
  • Open Access
2 Citations
3,838 Views
15 Pages

Group Sparse Precoding for Cloud-RAN with Multiple User Antennas

  • Zhiyang Liu,
  • Yingxin Zhao,
  • Hong Wu and
  • Shuxue Ding

23 February 2018

Cloud radio access network (C-RAN) has become a promising network architecture to support the massive data traffic in the next generation cellular networks. In a C-RAN, a massive number of low-cost remote antenna ports (RAPs) are connected to a singl...

  • Review
  • Open Access
37 Citations
13,937 Views
30 Pages

We describe self-organizing network (SON) concepts and architectures and their potential to play a central role in 5G deployment and next-generation networks. Our focus is on the basic SON use case applied to radio access networks (RAN), which is sel...

  • Article
  • Open Access
17 Citations
10,106 Views
28 Pages

11 February 2020

This paper presents a solution for enabling the coexistence of digitized radio-over-fiber (D-RoF) and analog radio-over-fiber (A-RoF) interfaces operating in the optical fronthaul of 5G mobile systems. In the first section, we formulate the need to i...

  • Article
  • Open Access
3 Citations
4,076 Views
19 Pages

Precoded Generalized Spatial Modulation for Downlink MIMO Transmissions in Beyond 5G Networks

  • João Pedro Pavia,
  • Vasco Velez,
  • Bernardo Brogueira,
  • Nuno Souto and
  • Américo Correia

22 September 2020

The design of multiple input multiple output (MIMO) schemes capable of achieving both high spectral and energy efficiency constitutes a challenge for next-generation wireless networks. MIMO schemes based on generalized spatial modulations (GSM) have...

  • Article
  • Open Access
5 Citations
4,778 Views
19 Pages

12 October 2019

In networking systems such as cloud radio access networks (C-RAN) where users receive the connection and data service from short-range, light-weight base stations (BSs), users’ mobility has a significant impact on their association with BSs. Al...

  • Article
  • Open Access
7 Citations
3,852 Views
36 Pages

End-to-End Power Models for 5G Radio Access Network Architectures with a Perspective on 6G

  • Bhuvaneshwar Doorgakant,
  • Tulsi Pawan Fowdur and
  • Mobayode O. Akinsolu

30 January 2025

5G, the fifth-generation mobile network, is predicted to significantly increase the traditional trajectory of energy consumption. It now uses four times as much energy as 4G, the fourth-generation mobile network. As a result, compared to previous gen...

  • Article
  • Open Access
1 Citations
4,297 Views
22 Pages

26 June 2017

In the downlink cloud radio access network (C-RAN), fronthaul compression has been developed to combat the performance bottleneck caused by the capacity-limited fronthaul links. Nevertheless, the state-of-arts focusing on fronthaul compression for sp...

  • Article
  • Open Access
29 Citations
6,448 Views
18 Pages

A Genetic Algorithm for VNF Provisioning in NFV-Enabled Cloud/MEC RAN Architectures

  • Lidia Ruiz,
  • Ramón J. Durán,
  • Ignacio De Miguel,
  • Pouria S. Khodashenas,
  • Jose-Juan Pedreño-Manresa,
  • Noemí Merayo,
  • Juan C. Aguado,
  • Pablo Pavón-Marino,
  • Shuaib Siddiqui and
  • Evaristo J. Abril
  • + 3 authors

13 December 2018

5G technologies promise to bring new network and service capacities and are expected to introduce significant architectural and service deployment transformations. The Cloud-Radio Access Networks (C-RAN) architecture, enabled by the combination of So...

  • Tutorial
  • Open Access
14 Citations
3,980 Views
32 Pages

An Information-Theoretic View of Mixed-Delay Traffic in 5G and 6G

  • Homa Nikbakht,
  • Michèle Wigger,
  • Malcolm Egan,
  • Shlomo Shamai (Shitz),
  • Jean-Marie Gorce and
  • H. Vincent Poor

30 April 2022

Fifth generation mobile communication systems (5G) have to accommodate both Ultra-Reliable Low-Latency Communication (URLLC) and enhanced Mobile Broadband (eMBB) services. While eMBB applications support high data rates, URLLC services aim at guarant...

  • Feature Paper
  • Article
  • Open Access
10 Citations
7,033 Views
19 Pages

The next evolution in cellular communications will not only improve upon the performance of previous generations, but also represent an unparalleled expansion in the number of services and use cases. One of the foundations for this evolution is the d...

  • Article
  • Open Access
15 Citations
5,380 Views
15 Pages

1 September 2018

In 5G networks, heterogeneous cloud radio access network (H-CRAN) is considered a promising future architecture to minimize energy consumption and efficiently allocate resources. However, with the increase in the number of users, studies are performe...

  • Article
  • Open Access
17 Citations
6,077 Views
21 Pages

Broadband Wireless Communication Systems for Vacuum Tube High-Speed Flying Train

  • Chencheng Qiu,
  • Liu Liu,
  • Botao Han,
  • Jiachi Zhang,
  • Zheng Li and
  • Tao Zhou

18 February 2020

A vactrain (or vacuum tube high-speed flying train) is considered as a novel proposed rail transportation approach in the ultra-high-speed scenario. The maglev train can run with low mechanical friction, low air resistance, and low noise mode at a sp...

  • Article
  • Open Access
17 Citations
5,852 Views
19 Pages

Tradeoff between User Quality-Of-Experience and Service Provider Profit in 5G Cloud Radio Access Network

  • Mahbuba Afrin,
  • Md. Abdur Razzaque,
  • Iffat Anjum,
  • Mohammad Mehedi Hassan and
  • Atif Alamri

18 November 2017

In recent years, the Cloud Radio Access Network (CRAN) has become a promising solution for increasing network capacity in terms of high data rates and low latencies for fifth-generation (5G) cellular networks. In CRAN, the traditional base stations (...

  • Article
  • Open Access
11 Citations
4,230 Views
18 Pages

29 March 2020

Emergency communications need to meet the developing demand of equipment and the complex scenarios of network in public safety networks (PSNs). Heterogeneous Cloud Radio Access Network (H-CRAN), an important technology of the 5th generation wireless...

  • Article
  • Open Access
11 Citations
4,728 Views
19 Pages

8 February 2019

Virtual reality (VR) is emerging as one of key applications in future fifth-generation (5G) networks. Uploading VR video in 5G network is expected to boom in near future, as general consumers could generate high-quality VR videos with portable 360-de...

  • Article
  • Open Access
1 Citations
1,458 Views
24 Pages

13 December 2024

The proliferation of 5G networks has revolutionized wireless communication by delivering enhanced speeds, ultra-low latency, and widespread connectivity. However, in heterogeneous cloud radio access networks (H-CRAN), efficiently managing inter-cell...

  • Tutorial
  • Open Access
86 Citations
10,713 Views
36 Pages

27 January 2020

This tutorial paper focuses on the variants of the bottleneck problem taking an information theoretic perspective and discusses practical methods to solve it, as well as its connection to coding and learning aspects. The intimate connections of this...

  • Article
  • Open Access
13 Citations
4,770 Views
17 Pages

Mitigation of Phase Noise and Nonlinearities for High Capacity Radio-over-Fiber Links

  • Muhammad Kamal Asif Khan,
  • Farman Ali,
  • Muhammad Irfan,
  • Fazal Muhammad,
  • Faisal Althobiani,
  • Asar Ali,
  • Suliman Khan,
  • Saifur Rahman,
  • Grzegorz Perun and
  • Adam Glowacz

Radio-over-fiber (RoF) links successfully provide high data rates and bandwidth capacity with a low complexity system architecture, as compared to its counterpart digital-RoF. In addition, the compound of quadrature amplitude modulation (QAM) and ort...

  • Article
  • Open Access
45 Citations
7,562 Views
23 Pages

1 December 2022

Currently, 5G and the forthcoming 6G mobile communication systems are the most promising cellular generations expected to beat the growing hunger for bandwidth and enable the fully connected world presented by the Internet of Everything (IoE). The cl...