Navid Nikaein

article

User Association in HetNets: Impact of Traffic Differentiation and Backhaul Limitations

Nikolaos Sapountzis, Thrasyvoulos Spyropoulos, Navid Nikaein, Umer Salim

IEEE/ACM Transactions on Networking > 2017 > 25 > 6 > 3396 - 3410

Operators, struggling to continuously add capacity and upgrade their architecture to keep up with data traffic increase, are turning their attention to denser deployments that improve spectral efficiency. Denser deployments make the problem of user association challenging, and much work has been devoted to finding algorithms that strike a tradeoff between user quality of service, and network-wide...

chapter

Self-backhauled autonomous LTE mesh networks

Romain Favraud, Chia-Yu Chang, Navid Nikaein

2017 IEEE 13th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob) > 1 - 8

2017 IEEE 13th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

Reliable service provisioning is crucial to the public safety (PS) communications especially when network outage happens. Isolated E-UTRAN operation, introduced in LTE Release 13, is able to host separate core network functions at the base stations (BSs) to provide limited set of services to the users. However, a significant issue remains to be solved is to coordinate among BSs to create an autonomous...

chapter

Multi-objective placement of virtual network function chains in 5G

Osama Arouk, Thierry Turletti, Navid Nikaein

2017 IEEE 6th International Conference on Cloud Networking (CloudNet) > 1 - 6

2017 IEEE 6th International Conference on Cloud Networking (CloudNet)

In this paper we propose a novel algorithm, namely Multi-Objective Placement (MOP), for the efficient placement of Virtualized Network Function (VNF) chains in future 5G systems. Real datasets are used to evaluate the performance of MOP in terms of acceptance ratio and embedding time when placing the time critical radio access network (RAN) functions as a chain. In addition, we rely on a realistic...

article

Improving the efficiency and reliability of wearable based mobile eHealth applications

Cesar Garcia-Perez, Almudena Diaz-Zayas, Alvaro Rios, Pedro Merino, more

Pervasive and Mobile Computing > 2017 > 40 > C > 674-691

In this paper we address the support of wearable mHealth applications in LTE and future 5G networks following a holistic approach that spans across the elements of a mobile network. The communication requirements change from one application to another so we propose a measurement methodology to facilitate the selection of the user equipment to fulfil these requirements. We also discuss a new network...

article

Modelling and implementation of virtual radio resources management for 5G Cloud RAN

Sina Khatibi, Luísa Caeiro, Lúcio S. Ferreira, Luis M. Correia, more

EURASIP Journal on Wireless Communications and Networking > 2017 > 2017 > 1 > 1-16

The virtualisation of Radio Access Networks (RANs) is one of the goals in designing 5G mobile networks. This paper aims at presenting a proof of concept for the virtualisation of radio resources using Open Air Interface (OAI), a software-based Long-Term Evolution (LTE) eNodeB physical emulator. OAI was extended to support multi-tenancy, representing diverse Virtual mobile Network Operators (VNOs)...

chapter

Scalable two-hop relaying for mmWave networks

Junquan Deng, Olav Tirkkonen, Tao Chen, Navid Nikaein

2017 European Conference on Networks and Communications (EuCNC) > 1 - 6

2017 European Conference on Networks and Communications (EuCNC)

The performance of millimeter wave (mmWave) networks is limited by severe blocking effects. Mobile relaying exploiting possible two-hop line-of-sight connections is a strong candidate for coverage extension and consistent user experience in mmWave networks. Here, relaying based on opportunistic analog beamforming is investigated, and sets of fixed beams are used for cell discovery, relay discovery...

chapter

Experimental evaluation of functional splits for 5G cloud-RANs

Nikos Makris, Pavlos Basaras, Thanasis Korakis, Navid Nikaein, more

2017 IEEE International Conference on Communications (ICC) > 1 - 6

ICC 2017 - 2017 IEEE International Conference on Communications

Centralized RAN processing has been identified as one of the major enablers for 5G mobile network access. By moving the baseband units (BBU) to the Cloud, multiple instances can be instantiated on the fly, serving several Remote Radio Head (RRH) units. The goal is to satisfy the existing demand of particular geographical areas, whereas drastically reducing the overall CAPEX and OPEX costs of the mobile...

chapter

Low latency MEC framework for SDN-based LTE/LTE-A networks

Anta Huang, Navid Nikaein, Tore Stenbock, Adlen Ksentini, more

2017 IEEE International Conference on Communications (ICC) > 1 - 6

ICC 2017 - 2017 IEEE International Conference on Communications

Mobile Edge Computing (MEC) consists of deploying computing resources (CPU, storage) at the edge of mobile networks; typically near or with eNodeBs. Besides easing the deployment of applications and services requiring low access to the remote server, such as Virtual Reality and Vehicular IoT, MEC will enable the development of context-aware and context-optimized applications, thanks to the Radio API...

chapter

FlexCRAN: A flexible functional split framework over ethernet fronthaul in Cloud-RAN

Chia-Yu Chang, Navid Nikaein, Raymond Knopp, Thrasyvoulos Spyropoulos, more

2017 IEEE International Conference on Communications (ICC) > 1 - 7

ICC 2017 - 2017 IEEE International Conference on Communications

Thorough investigation of the Cloud-RAN (C-RAN) architecture has recently shown that C-RAN can bring advanced cooperated and coordinated processing capabilities as well as the multiplexing gains toward future radio access networks. The baseband processing of each base station instance can now be flexibly split into smaller functional components, that can be placed either at remote radio units (RRUs)...

chapter

Design aspects for 5G architectures: The SESAME and COHERENT approach

Alexandros Kostopoulos, Ioannis Chochliouros, Fang-Chun Kuo, Roberto Riggio, more

2017 IEEE International Conference on Communications Workshops (ICC Workshops) > 986 - 992

2017 IEEE International Conference on Communications Workshops (ICC Workshops)

The exponential growth of mobile data traffic still remains an important challenge for the mobile network operators. In response, the 5G scene needs to couple fast connectivity and optimized spectrum usage with cloud networking and high processing power, optimally combined in a converged environment. In this paper, we investigate two 5G research projects; SESAME [1] and COHERENT [2]. We consider the...

article

Network Slices toward 5G Communications: Slicing the LTE Network

Kostas Katsalis, Navid Nikaein, Eryk Schiller, Adlen Ksentini, more

IEEE Communications Magazine > 2017 > 55 > 8 > 146 - 154

The upcoming 5G ecosystem is envisioned to build business-driven network slices to accommodate the different needs of divergent service types, applications, and services in support of vertical industries. In this article, we describe the network slicing concept by unveiling a novel network slicing architecture for integrated 5G communications. Further, we demonstrate its realization for the case of...

article

Resource Allocation and Interference Management for Opportunistic Relaying in Integrated mmWave/sub-6 GHz 5G Networks

Junquan Deng, Olav Tirkkonen, Ragnar Freij-Hollanti, Tao Chen, more

IEEE Communications Magazine > 2017 > 55 > 6 > 94 - 101

The 5G networks are envisioned to use mmWave bands to provide gigabit-per-second throughput. To extend the coverage of extreme data rates provided by mmWave technologies, we consider two-hop relaying based on D2D communication in an integrated mmWave/sub-6 GHz 5G network. Compared to single-hop multi-cell networks, two-hop D2D relaying in this network will complicate the network management. Relay...

chapter

FLEXCRAN: Cloud radio access network prototype using OpenAirInterface

S. Sandeep Kumar, Raymond Knopp, Navid Nikaein, Debashisha Mishra, more

2017 9th International Conference on Communication Systems and Networks (COMSNETS) > 421 - 422

2017 9th International Conference on Communication Systems and Networks (COMSNETS)

In this demo, we describe the realization of cloud radio access network (C-RAN) prototype using OpenAirInterface (OAI) software and commodity hardware. The deployment of the centralized baseband processing on the remote cloud center (RCC), and the remote radio units (RRU), connected over Ethernet fronthaul is demonstrated. Further, the demo illustrates the flexibility in deploying several cellular...

article

Toward Enforcing Network Slicing on RAN: Flexibility and Resources Abstraction

Adlen Ksentini, Navid Nikaein

IEEE Communications Magazine > 2017 > 55 > 6 > 102 - 108

Knowing the variety of services and applications to be supported in the upcoming 5G systems, the current "one size fits all" network architecture is no more efficient. Indeed, each 5G service may have different needs in terms of latency, bandwidth, and reliability, which cannot be sustained by the same physical network infrastructure. In this context, network virtualization represents a...

chapter

Impact of Packetization and Scheduling on C-RAN Fronthaul Performance

Chia-Yu Chang, Navid Nikaein, Thrasyvoulos Spyropoulos

2016 IEEE Global Communications Conference (GLOBECOM) > 1 - 7

GLOBECOM 2016 - 2016 IEEE Global Communications Conference

Being considered as a key enabler for beyond 4G networks, Cloud-RAN (CRAN) offers advanced cooperation and coordinated processing capabilities and brings multiplexing gains. The high capacity and low latency fronthaul (FH) links requirement in the CRAN architecture can be reduced by a ?exible functional split of baseband processing between remote radio units (RRUs) and Baseband units (BBUs). Under...

chapter

Multi-Domain Orchestration for NFV: Challenges and Research Directions

Kostas Katsalis, Navid Nikaein, Andy Edmonds

2016 15th International Conference on Ubiquitous Computing and Communications and 2016 International Symposium on Cyberspace and Security (IUCC-CSS) > 189 - 195

2016 15th International Conference on Ubiquitous Computing and Communications and 2016 International Symposium on Cyberspace and Security (IUCC-CSS)

In this paper we focus on the problem of multidomain orchestration for Network Function Virtualization (NFV), over multi-technology environments. In order to facilitate service deployment in end-to-end setups, new orchestration designs are required that exploit and advance existing methodologies. We examine in detail the challenges on multi-domain NFV orchestration for the general case and we provide...

article

An Analytical Framework for Multilayer Partial Frequency Reuse Scheme Design in Mobile Communication Systems

Lusheng Wang, Fei Fang, Navid Nikaein, Laura Cottatellucci

IEEE Transactions on Vehicular Technology > 2016 > 65 > 9 > 7593 - 7605

Partial frequency reuse (PFR) is one of the key techniques to improving max-min fairness for cell-edge user equipment in the fourth generation of mobile communication systems. Recently, multilayer PFR schemes have been proposed, which are considered to be a promising evolution of this technique. In this paper, we propose an analytical framework for multilayer PFR scheme design, which uses a triplet...

article

Toward a Fully Cloudified Mobile Network Infrastructure

Bruno Sousa, Luis Cordeiro, Paulo Simoes, Andy Edmonds, more

IEEE Transactions on Network and Service Management > 2016 > 13 > 3 > 547 - 563

Cloud computing enables the on-demand delivery of resources for a multitude of services and gives the opportunity for small agile companies to compete with large industries. In the telco world, cloud computing is currently mostly used by mobile network operators (MNO) for hosting non-critical support services and selling cloud services such as applications and data storage. MNOs are investigating...

chapter

Analyzing X2 handover in LTE/LTE-A

Konstantinos Alexandris, Navid Nikaein, Raymond Knopp, Christian Bonnet

2016 14th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) > 1 - 7

2016 14th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)

Handover procedure in LTE/LTE-A has been radically evolved when compared to the previous 3GPP standards. In particular, X2 handover is introduced to allow neighboring eNBs to handle the user mobility without the involvement of the core network. While most of the application could considerably benefit from the X2 handover performance improvement, delay breakdown and impact of parameters from the UE...

chapter

SLA-Driven VM Scheduling in Mobile Edge Computing

Kostas Katsalis, Thanasis G. Papaioannou, Navid Nikaein, Leandros Tassiulas

2016 IEEE 9th International Conference on Cloud Computing (CLOUD) > 750 - 757

2016 IEEE 9th International Conference on Cloud Computing (CLOUD)

Mobile-Edge Computing (MEC) is about offering application developers and service providers cloud-computing capabilities and an IT service environment at the edge of the mobile network. However, although cloud computing can be used to meet traditional challenges, like scalability concerns and provide for fast resource provisioning times, a multifaceted analysis is required when it comes in multi-operator...

INFONA - science communication portal

Search results for: Navid Nikaein

User Association in HetNets: Impact of Traffic Differentiation and Backhaul Limitations

Self-backhauled autonomous LTE mesh networks

Multi-objective placement of virtual network function chains in 5G

Improving the efficiency and reliability of wearable based mobile eHealth applications

Modelling and implementation of virtual radio resources management for 5G Cloud RAN

Scalable two-hop relaying for mmWave networks

Experimental evaluation of functional splits for 5G cloud-RANs

Low latency MEC framework for SDN-based LTE/LTE-A networks

FlexCRAN: A flexible functional split framework over ethernet fronthaul in Cloud-RAN

Design aspects for 5G architectures: The SESAME and COHERENT approach

Network Slices toward 5G Communications: Slicing the LTE Network

Resource Allocation and Interference Management for Opportunistic Relaying in Integrated mmWave/sub-6 GHz 5G Networks

FLEXCRAN: Cloud radio access network prototype using OpenAirInterface

Toward Enforcing Network Slicing on RAN: Flexibility and Resources Abstraction

Impact of Packetization and Scheduling on C-RAN Fronthaul Performance

Multi-Domain Orchestration for NFV: Challenges and Research Directions

An Analytical Framework for Multilayer Partial Frequency Reuse Scheme Design in Mobile Communication Systems

Toward a Fully Cloudified Mobile Network Infrastructure

Analyzing X2 handover in LTE/LTE-A

SLA-Driven VM Scheduling in Mobile Edge Computing

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