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Study of coexistence between different services in novel 5G Frequency Bands
... Based on the adopted MCL computation method, the resulting I/N (Interference to Noise ratio) is evaluated and compared with the threshold at the victim receiver as already shown in [11]. ...
... ITU-R P.2109 [9] is used to evaluate the additional Building Penetration Loss. These models are commonly used at international level for coexistence studies ( [10], [11]). ...
With the blossoming of network functions virtualization and software-defined networks, networks are becoming more and more agile with features like resilience, programmability, and open interfaces, which help operators to launch a network or service with more flexibility and shorter time to market. Recently, the concept of network slicing has been proposed to facilitate the building of a dedicated and customized logical network with virtualized resources. In this article, we introduce the concept of hierarchical NSaaS, helping operators to offer customized end-to-end cellular networks as a service. Moreover, the service orchestration and service level agreement mapping for quality assurance are introduced to illustrate the architecture of service management across different levels of service models. Finally, we illustrate the process of network slicing as a service within operators by typical examples. With network slicing as a service, we believe that the supporting system will transform itself to a production system by merging the operation and business domains, and enabling operators to build network slices for vertical industries more agilely.
This paper presents the Italian pilot on Licensed Shared Access (LSA) in the IMT Band 40 to explore the potential and logistics of spectrum sharing from a regulatory perspective. Organised on a small cell / micro cell scale, it verified both the technical feasibility and regulatory compliance of LSA in a real, LTE-TDD network, constrained by the national spectrum use in Band 40. The LSA system was implemented in compliance with the CEPT, ETSI and 3GPP specifications. We present an innovative distributed architecture implemented across three countries, enabling certain features of 5G networks. We describe the sharing framework and sharing conditions in the Italian scenario for the use cases representing actual incumbents. These were verified through in-field measurements, key results of which are presented. Measurement results show that sharing based on LSA is feasible to provide additional capacity for mobile broadband services in the 2300-2400 MHz band without detriment to incumbent services. Use of commercial off-the-shelf equipment to create new mobile broadband service in an urban indoor / outdoor environment, pilot enabled us to assess the spectrum sharing opportunities through LSA technology for general deployment today and towards future policy for 5G spectrum in Italy.
With centralized processing, cooperative radio, real-time cloud computing, and clean infrastructure, C-RAN is a "future-proof" solution to sustain the mobile data explosion in future wireless networks. The technology holds great potential in enhancing LTE with the necessary capability to accommodate the unprecedented traffic volume that today's wireless cellular system is facing. However, the high density of RRHs in C-RANs leads to severe scalability issues in terms of computational and implementation complexities. This article discusses the challenges and recent developments in the technologies that potentially address the scalability issues of C-RANs. In particular, we focus on the collaborative signal processing, resource management, and green architecture of C-RAN systems. This article is a humble attempt to draw the attention of the research community to the following important question: how to leverage the revolutionary architecture of C-RAN to attain unprecedented system capacity at an affordable cost and complexity.
In fifth-generation (5G) mobile networks, a major challenge is to effectively improve system capacity and meet dynamic service demands. One promising technology to solve this problem is heterogeneous networks (HetNets), which involve a large number of densified low power nodes (LPNs). This article proposes a software defined network (SDN) based intelligent model that can efficiently manage the heterogeneous infrastructure and resources. In particular, we first review the latest SDN standards and discuss the possible extensions. We then discuss the advantages of SDN in meeting the dynamic nature of services and requirements in 5G HetNets. Finally, we develop a variety of schemes to improve traffic control, subscriber management, and resource allocation. Performance analysis shows that our proposed system is reliable, scalable, and implementable.
The exponential growth of connected devices, big data and cloud computing is driving a concrete transformation impacting the ICT world. This hyper-connected scenario is deeply affecting relationships between individuals, enterprises, citizens and Public Administrations, fostering innovative use cases in practically any environment and market, and introducing new opportunities and new challenges. The successful realization of this hyper-connected scenario depends on different elements of the ecosystem. In particular, it builds on connectivity and functionalities allowed by converged Next Generation Networks (NGN) and their capacity to support and integrate with the Internet of Things, M2M and Cloud Computing. This paper aims at providing some hints of this scenario in order to contribute to analyze impacts on network issues and requirements and open the way to handle this explosion in data communication, while maintaining consumer expectations and turn data into meaningful social and economic benefits.
Calculation of free-space attenuation
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Guidelines for evaluation of radio interface technologies for IMT-Advanced
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Reference radiation patterns for fixed wireless system antennas for use in coordination studies and interference assessment in the frequency range from 100 MHz to about 70 GHz
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Prediction procedure for the evaluation of interference between stations on the surface of the Earth at frequencies above about 0.1 GHz
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Prediction of Clutter Loss
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Prediction of building entry loss
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Modelling and simulation of IMT networks and systems for use in sharing and compatibility studies
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- Itu-R M
Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3 000 MHz
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Propagation data and prediction methods for the planning of short-range outdoor radiocommunication systems and radio local area networks in the frequency range 300 MHz to 100 GHz
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Digital mobile radio towards future generation systems
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