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Fifth-generation (5G) envisages a “hyper-connected society” where an enormous number of diverse entities could communicate with each other anywhere and at any time, some of which will demand extremely challenging performance requirements such as sub-millisecond latency, and higher data rates. Cloud-enabled radio access networks (CE-RANs) where intelligence is placed at the edge of the mobile network...
Service Assurance (SA) is a significant part of Network Function Virtualization (NFV) to enable automated and efficient service delivery from end to end (E2E). In NFV, SA should be integrated into the design and development loop from the beginning. However, it sees slower pace than other NFV management and orchestration (MANO) components. Most of present NFV-SA solutions are partial and do not provide...
One of the main challenges in delivering end-toend service chains across multiple Software Defined Networking (SDN) and Network Function Virtualization (NFV) domains is to achieve unified management and orchestration functions. A very critical aspect is the definition of an open, vendoragnostic, and interoperable northbound interface (NBI) that should be as abstracted as possible from domain-specific...
In the last years, networking scenarios have been evolving, hand-in-hand with new and varied applications with heterogeneous Quality of Service (QoS) requirements. These requirements must be efficiently and effectively delivered. Given its static layered structure and almost complete lack of built-in QoS support, the current TCP/IP-based Internet hinders such an evolution. In contrast, the clean-slate...
Software-Defined Networking (SDN) is an innovative approach to provisioning and delivering QoS (Quality of Service) services, yet it is still devoid of context-differentiating services. In this paper we propose a network application (Autonomic QoS Broker) and a controller module that implements the OpenVSwitch Database Management Protocol (OVSDB). These two components were implemented and validated...
SDN controllers include mechanisms to globally reconfigure the network in order to quickly respond to a changing environment. However, the reconfiguration of the network affects the QoS of data connections. This demo presents an architecture for the SDN controller where a control policy operates on top of an iterative routing solver to dynamically decide whether to reconfigure the network. The control...
Cloud providers can be organized in associations of multiple clouds with the objective of achieving all canonical properties expected from the cloud computing paradigm. However, problems inherent to the resource offering and consumption arise as one limitation to furnish cloud computing at its full extent. This work describes a multiple cloud architecture that utilizes a tournament model to promote...
Software Defined Networking (SDN) architecture promises to mitigate limitations of traditional networking architectures in order to satisfy today's complex networking needs. However, as all new networking architectures, SDN also presents several inevitable technical challenges to be addressed by researchers. Control plane scalability is one of the crucial issues deserving more attention from both...
Heterogeneous networks principally composed of macro-cells overlaid with small cells (e.g., Femtocells, pico-cells, and relays) can potentially improve the coverage and capacity of existing cellular networks and satisfy the growing demands of data throughput. In Het Nets, small cells play a key role in offloading user data traffic from congested macro-cells and extending the limited coverage of macro-cells...
With the number of different cloud providers growing the importance for reliable and up-to-date performance data increases to make qualified decision on what providers to use to carry out different tasks. To cope with this issue, this paper proposes a framework usable for distributed and self-organized continuous benchmarking of hybrid and heterogeneous cloud environments. The framework implements...
A Service Level Agreement (SLA) is a contract between a service provider and a consumer which specifies in detail the level of service expected from the service provider, obligations, commitment and objectives. In the cloud computing environment, both the cloud provider and the cloud consumer want to know of a likely service violation before the actual violation occurs and to adjust the scaling of...
WiMAX Networks are emerging as key components of a solution to provide mobile broadband and Network planning and resource allocation (available unused Bandwidth) in flexible and cost effective way. Since the data can share (STA) useful information or Data in order to improve the performance of handoff procedures. Beam forming Technique is an improvement in range of data rate and minimizing the number...
The concept of interoperation between cloud providers is a recent research challenging objective. Current cloud systems have been developed without concerns of seamless cloud interconnection, and actually they do not support intercloud interoperability. The paper proposes a conceptual model for Intercloud Interoperability, to enable schedule dynamic operation for Infrastructure as a Service (IaaS)...
Cloud computing is increasingly being used to deliver infrastructure, platform and/or software as services over the Internet. The resulting Cloud-based services with various types create complex management situations at the Cloud provider side. In particular, face to a large and dynamic number of service loads, a Cloud provider needs a means to maintain QoS (Quality of Service) levels it has agreed-upon...
As more bandwidth hogging applications like video streaming or video conferencing are entering the telecom market, indoor networks need to be more efficient, failure-resilient and flexible. WiFi have predominantly been the most ubiquitous indoor wireless technology. WiFi Access Points (APs) are placed progressively in indoor locations resulting in highly congested ISM spectrum bands. Thus users are...
The constant evolution and growth of multimedia applications supported by today's mobile devices leads to an increase on the demand for video based services which impose new requirements in terms of bitrate and delay. In order to face these challenges, LTE appears as a technology capable of dealing with the video traffic load on mobile networks. However, given the inherent nature of mobile networks...
The era of the Internet of Things brings complexity and deployment costs in smart cities, particularly in Wireless Sensor Networks (WSNs). Utilities such as gas or water providers are keen on delegating the management of the communications to specialized firms, namely WSN Operators, that will share the WSN resource among their various clients. WSN operators will use a functional architecture to manage...
With the increasing popularity of Software defined network (SDN), designing a scalable SDN control plane becomes a critical problem. An effective approach to improving the scalability is to design distributed architecture of SDN control plane. However, how to evaluate the scalability of SDN control planes remains unexplored. In this paper, we propose a metric of scalability for SDN control planes,...
Service brokers are commonly used in the cloud computing paradigm to represent service requesters to select a service provider. They act as an intermediary between the two parties. One model of the cloud computing paradigm involves 3 layers, the user, the SaaS provider and the Cloud provider. The selection of service requesters is challenging due to the different levels of Quality of Service that...
Software-as-a-Service (SaaS) is a new service delivery model which allows customers to use the provider's applications running on a cloud infrastructure, SaaS is commonly utilized and it provides benefits to service providers and customers. As more and more SaaS service emerges, how to select qualified provider is a key problem to customers. Current quality model do not consider key features of SaaS...
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