9,737 research outputs found
Algorithms for advance bandwidth reservation in media production networks
Media production generally requires many geographically distributed actors (e.g., production houses, broadcasters, advertisers) to exchange huge amounts of raw video and audio data. Traditional distribution techniques, such as dedicated point-to-point optical links, are highly inefficient in terms of installation time and cost. To improve efficiency, shared media production networks that connect all involved actors over a large geographical area, are currently being deployed. The traffic in such networks is often predictable, as the timing and bandwidth requirements of data transfers are generally known hours or even days in advance. As such, the use of advance bandwidth reservation (AR) can greatly increase resource utilization and cost efficiency. In this paper, we propose an Integer Linear Programming formulation of the bandwidth scheduling problem, which takes into account the specific characteristics of media production networks, is presented. Two novel optimization algorithms based on this model are thoroughly evaluated and compared by means of in-depth simulation results
Network Service Orchestration: A Survey
Business models of network service providers are undergoing an evolving
transformation fueled by vertical customer demands and technological advances
such as 5G, Software Defined Networking~(SDN), and Network Function
Virtualization~(NFV). Emerging scenarios call for agile network services
consuming network, storage, and compute resources across heterogeneous
infrastructures and administrative domains. Coordinating resource control and
service creation across interconnected domains and diverse technologies becomes
a grand challenge. Research and development efforts are being devoted to
enabling orchestration processes to automate, coordinate, and manage the
deployment and operation of network services. In this survey, we delve into the
topic of Network Service Orchestration~(NSO) by reviewing the historical
background, relevant research projects, enabling technologies, and
standardization activities. We define key concepts and propose a taxonomy of
NSO approaches and solutions to pave the way towards a common understanding of
the various ongoing efforts around the realization of diverse NSO application
scenarios. Based on the analysis of the state of affairs, we present a series
of open challenges and research opportunities, altogether contributing to a
timely and comprehensive survey on the vibrant and strategic topic of network
service orchestration.Comment: Accepted for publication at Computer Communications Journa
A 5G mobile network architecture to support vertical industries
The telecom industry is moving from a "horizontal" service delivery model, where services are defined independent of their consumers, toward a "vertical" delivery model, where the provided services are tailored to specific industry sectors and verticals. In order to enable this transition, an end-to-end comprehensive 5G architecture is needed, with capabilities to support the use cases of the different vertical industries. A key feature of this architecture is the implementation of network slicing over a single infrastructure to provision highly heterogeneous vertical services, as well as a network slicing management system capable of handling simultaneous slices. On top of the network slicing technology, functionality needs to be devised to deploy the slices required by the different vertical players and provide them with a suitable interface to manage their slice. In this article, we design a 5G mobile network architecture to support vertical industries. The proposed architecture builds on ongoing standardization efforts at 3GPP and ETSI, and incorporates additional modules to provide enhanced MANO and control functionality as well as artificial-intelligence-based data analytics. On top of these modules, a service layer is provided to offer vertical players an easyto- use interface to manage their services.This work was supported by the H2020 5G-TOURS European project (Grant Agreement No. 856950)
The Road Ahead for Networking: A Survey on ICN-IP Coexistence Solutions
In recent years, the current Internet has experienced an unexpected paradigm
shift in the usage model, which has pushed researchers towards the design of
the Information-Centric Networking (ICN) paradigm as a possible replacement of
the existing architecture. Even though both Academia and Industry have
investigated the feasibility and effectiveness of ICN, achieving the complete
replacement of the Internet Protocol (IP) is a challenging task.
Some research groups have already addressed the coexistence by designing
their own architectures, but none of those is the final solution to move
towards the future Internet considering the unaltered state of the networking.
To design such architecture, the research community needs now a comprehensive
overview of the existing solutions that have so far addressed the coexistence.
The purpose of this paper is to reach this goal by providing the first
comprehensive survey and classification of the coexistence architectures
according to their features (i.e., deployment approach, deployment scenarios,
addressed coexistence requirements and architecture or technology used) and
evaluation parameters (i.e., challenges emerging during the deployment and the
runtime behaviour of an architecture). We believe that this paper will finally
fill the gap required for moving towards the design of the final coexistence
architecture.Comment: 23 pages, 16 figures, 3 table
Dynamic service composition for telecommunication services and its challenges
As communication networks have evolved towards IP (Internet Protocol) networks, telecommunication operators has expanded its reach to internet multimedia web content services while operating circuit-switch networks in parallel. With the adoption of SOA (Service Oriented Architecture) that enables service capability interfaces to be published and integrated with other service capabilities into new composite service, service composition allows telecommunication providers to accelerate more new services provisioning. From the perspective of telecommunication providers to deliver integrated composite service from different providers and different network protocols, this paper is aimed to present the current service composition based on middleware approaches; discuss the requirements of meeting the challenges; and compare the approaches
A Review of the Literature on Configuration Management Tools
Configuration management tools help administrators in defining and automating system configurations. With cloud computing, host numbers are likely to grow. IaaS (infrastructure as a service) offerings with pay-per-use pricing models make fast and effective deployment of applications necessary. Configuration management tools address both challenges. In this paper, the existing research on this topic is reviewed comprehensively. Readers are provided with a descriptive analysis of the published literature as well as with an analysis of the content of the respective research works. The paper serves as an overview for researchers who are new to the topic. Furthermore, it serves to identify work related to an intended research field and identifies research gaps. Practitioners are provided with a means to identify solutions to their organizational problems
A control and management architecture supporting autonomic NFV services
The proposed control, orchestration and management (COM) architecture is presented from a high-level point of view; it enables the dynamic provisioning of services such as network data connectivity or generic network slicing instances based on virtual network functions (VNF). The COM is based on Software Defined Networking (SDN) principles and is hierarchical, with a dedicated controller per technology domain. Along with the SDN control plane for the provisioning of connectivity, an ETSI NFV management and orchestration system is responsible for the instantiation of Network Services, understood in this context as interconnected VNFs. A key, novel component of the COM architecture is the monitoring and data analytics (MDA) system, able to collect monitoring data from the network, datacenters and applications which outputs can be used to proactively reconfigure resources thus adapting to future conditions, like load or degradations. To illustrate the COM architecture, a use case of a Content Delivery Network service taking advantage of the MDA ability to collect and deliver monitoring data is experimentally demonstrated.Peer ReviewedPostprint (author's final draft
- …