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Fog computing is rapidly changing the distributed computing landscape by extending the Cloud computing paradigm to include wide-spread resources located at the network edges. This diffused infrastructure is well suited for the implementation of data stream processing (DSP) applications, by possibly exploiting local computing resources. Storm is an open source, scalable, and fault-tolerant DSP system...
Considering the growth of customers craving for complex services like IPTV, cloud storage, and online gaming, traditional networking is quickly becoming an obsolete technology. The new networking paradigm, Software Defined Networking (SDN), in combination with the recent communication protocol, OpenFlow, brings a new perspective to the operator and cloud provider's core networks by providing new autonomous...
This paper investigates malleable reservation (MR) for data-oriented requests to revitalize spectrum fragments in elastic optical networks. We formulate a mixed integer linear programming model and propose a time-efficient heuristic to solve the MR problem.
The success achieved by Cloud Computing Services (CCSs) in modern IT scenarios is nowadays a matter of fact and service offerings between providers and customers continuously grow up and widen their scope. Similarly, service offerings are more and more based upon dynamic reservation and allocation of network, storage and computational resources, the hiding of visibility of internal IT components,...
Newly, with the emergence of demanding applications e.g. multimedia applciations and its rapid prevalence on a large scale area e.g. urban environment. Supporting the scalability as well as satisfying QoS of demanding applications represent one of the main properties in urban environments. However, supporting applications and services in a such complex, distributed, large and diverse environment as...
Cognitive Radio is often promoted to be a promising solution for the spectrum scarcity problem. Hence, a lot of research activities in both the civilian and the military world focus on introducing cognitive radio technology into modern networks. Besides the obvious changes in the radio architecture (sensing capability, cognitive engine), this combination of technologies also poses new challenges to...
In tactical networks, the quality of service of flows which demand an assured data rate requires connection admission control, and this process can be strongly improved by coupling it with QoS-oriented routing. The TACOMS phase 2 intelligent routing solution does not only choose paths according to their ability to provide a specified data rate, it can also select the route of a flow as a function...
A significant number of green, energy-saving network protocols have been invented in recent years in response to demand for reducing the amount of energy consumed by network infrastructure. In this paper, we report on the difficulties we encountered when building an SDN environment that could emulate energy saving protocols operating at different layers of the network. We propose solutions, based...
InfiniBand (IB) is a widely used network interconnect for modern high-performance computing systems. In large IB fabrics, isolation of nodes is provided through partitioning. The routing algorithm, however, is unaware of these partitions in the network, Traffic flows belonging to different partitions might share links inside the network fabric. This sharing of intermediate links creates interference,...
In this paper, we demonstrate an implementation of a Network Services Abstraction Layer (NSAL) on top of the network control and management plane. Furthermore, we introduce a unified data model for both Software Defined Networking (SDN) and legacy devices that allows managing and configuring both networks in a unified way in order to achieve Quality of Service (QoS) for time-critical tasks (e.g. VoIP)...
We will demonstrate an innovative network topology aware holistic smart backhaul solution — Self-optimizing Wireless Mesh Network (SWMN), supporting a partial mesh wireless backhaul implementation that is not only highly resilient and scalable, but also equipped with advanced SON (Self-Organizing Network) capabilities offering autonomous network configuration and traffic engineering features.
In this study, we aim to design a controller (XCon) which optimizes energy-efficiency in the over-provisioned indoor 4G cellular networks for under-utilized eNodeBs. In this manner, we propose a novel energy efficiency coefficient (EEC) which covers conventional bits=joule energy efficiency metric and additionally contains parameters such as channel utilization and SINR. Moreover, we define an optimization...
Time slot assignments in a TDMA ad hoc wireless network (AWN) is either centrally coordinated by a root node or distributed among all the nodes in the network. In the centralized TDMA network, the root node uses the global knowledge of the network to assign slots, but becomes more challenging in case of distributed network, as each node is expected to assign a slot for itself without conflicting other...
Technological developments in the micro-electronics and wireless communications, in addition to obtain ability of cheap CMOS cameras and micro phones, have led to appearance of next generation networks known as Wireless Multimedia Sensor Networks (WMSNs). WMSN can retrieve image, video, audio and scalar sensor data from the physical environment. Wireless multimedia sensor networks will not only enhance...
Cloud based datacenters will be most suitable candidates for future software defined networking. The QoS requirements for shared data centers, hosting diverse applications could be successfully achieved through SDN architecture. This paper provides an extension of our previously proposed scheme QAMO that was aimed at achieving tangible QoS in datacenters through controlling bandwidth reservation in...
In recent years marketplace agility and dynamic business needs require organizations to respond rapidly and cost-effectively to business demands. Service Oriented Architecture (SOA) is one of the most successful ways to design and integrate distributed systems. SOA has evolved to adopt vision of Service Oriented Enterprise. In order to realize this vision it is important to align IT with business...
In optical networks, faults in links and nodes cause massive loss of data even if for short periods. Therefore, protection techniques have been developed to cope with failures. Among these techniques, p-cycle is very attractive since it provides ring-like speed of restoration in mesh topologies. In recent years, the technology of flexgrid networks has emerged as a solution for dealing with the diversity...
Wireless Sensor Networks (WSNs) have been proposed for various monitoring applications including environmental, industrial, military and health care. The use of WSNs with cluster-tree topologies for such applications solves the limited coverage issue of the wireless sensor devices and allows them to be deployed in wider area. WSNs with cluster-tree topologies suffer from various problems including...
Security and Quality are the two major aspects in MANETs to be addressed. Many articles have addressed these aspects independently. Very few have concentrated on the trade off between security and quality of MANETs, but lost their performance. The proposed method WBTQ (Weightage Based Trusted QoS Protocol) focuses on both the issues in parallel, it is providing secure environment by evaluating each...
Current high-performance platforms such as Datacenters or High-Performance Computing systems rely on highspeed interconnection networks able to cope with the ever-increasing communication requirements of modern applications. In particular, in high-performance systems that must offer differentiated services to applications which involve traffic prioritization, it is almost mandatory that the interconnection...
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