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Software Defined Networking (SDN) is rapidly gaining acceptance and use in terrestrial networks but little research has been done to apply it to aerial networks. This paper describes an investigation into five open-source controllers using a specific set of criteria based on the characteristics of these networks. A preliminary qualitative investigation compares the controllers based on their state...
This paper studies the leader-following consensus problem for linear and Lipschitz nonlinear multiagent systems where the communication topology has a directed spanning tree with the leader as the root. Due to the constraints of communication bandwidth and storage space, agents can only receive uniform quantized information. We first consider the leader-following consensus problem for linear multiagent...
Recent developments in SiC power devices have enabled the development of Power Electronic Building Blocks (PEBBs) having greater switching frequencies than Si-based devices such as IGBTs, but also require shorter time scales in their corresponding control systems. At the same time, system designers are scaling up modularized converter systems, such as the Modular Multilevel Converter, which can now...
Routing Algorithm is an important mechanism which decides data transferring path in a network. Several existed routing algorithms are derived from a fundamental of graph theory with shortest path approach. A lot of additional network metrics were applied to serve the best quality of service (QoS) to end devices. However, a selected path from the existed algorithms can suffer from additional end-to-end...
Virtualization of computing and communication infrastructureswere disseminated as possible solutions for networksevolution and deployment of new services on clouddata centers. Although promising, their effective applicationfaces obstacles, mainly caused by rigidity on the managementof communication resources. Currently, the Software-DefinedNetworks (SDN) paradigm has been popularizing customizationand...
Data centers offer computational resources with various levels of guaranteed performance to the tenants, through differentiated Service Level Agreements (SLA). Typically, data center and cloud providers do not extend these guarantees to the networking layer. Since communication is carried over a network shared by all the tenants, the performance that a tenant application can achieve is unpredictable...
As the rapid growth of computing demand in cloud computing, the virtualization of data center network is more and more deployed. The data center is reconstructed to Software Defined Data Center with the technical of Software defined network. The services of data center are formed into Virtual Data Center, which is based on the virtual resource collection of the physical network section. So the VDC...
The scalability and geographical location agility of data centers have become two key concerns for those critical cloud applications. However, it is still infeasible to build non-blocking data centers which are scalable, agile and cost-effective, given that current network devices are either closed high-end or performance limited, and the dedicated fiber is expensive and hard to expand. This paper...
In the last years, prominent advances in software virtualization (e.g., Hypervisor) have enabled the agile deployment of cloud services and, at the same time, server consolidation operations through agile Virtual Machine (VM) operations (e.g., start-up, snapshot, cloning, and migrations) across Data Center (DC) servers. On the other hand, such advances pose new challenges in the overall management...
Data-centers play a fundamental role in cloud computing. As the market of cloud computing continues to scale, it becomes increasingly difficult to utilize resources in large data-center networks. There is a growing interest to seek for efficient data-center architectures among academia and industry. Software-defined Networking (SDN) is a promising technology to develop scalable network architectures...
The networking industry faces nowadays with the emergence of a somewhat revolutionary paradigm that is intended to rethink network architectures, with the intention to mitigate the limitations that appeared in the traditional networks: Software Defined Networking (SDN). This paper illustrates differences between some SDN controllers, which represent the “brains” of the network. POX, Ryu, ONOS and...
A large amount of scientific data needs to be transferred from one site to another as fast as possible in the computational science fields. High-speed data transfer between sites is very important, especially in the Grid computing field, GridFTP has been widely used for bulk data transfer over a wide area network. GridFTP achieves greater performance by supporting parallel TCP streams. Using parallel...
Software Defined Networking (SDN) has been a prevalent networking paradigm in recent years. Due to its simplicity to quickly deploy and fully manage networks, both academia and industry are interested in this technology. Nevertheless, there are still many issues to be solved. In this pape r, we propose to divide flow table into two separate tables, namely path table and traffic table, to minimize...
This paper proposes a novel routing method called Accumulative-Load Aware Routing (ALAR) for Software-Defined Networks (SDN), that takes into account the cumulative load of flows on each link. By employing knowledge of the whole network topology and traffic in route computation, this approach enhances the utilization of network resources, minimize the probability of congestion and through which the...
Cloud computing has been widely used to provide services such as search, social networks, and distributed storage systems. Data centers are built to support the requests of cloud applications which generally adopt multi-layer partition/aggregation workflow pattern. In this multi-hop environment with dual-homed topology, the aggregator needs to wait for all responses from the works to generate final...
The paper, after an overview of the typical requirements of Power Supply (PS) systems to control MagnetoHydroDynamic (MHD) instabilities and of technological solutions adopted in some present fusion experiments, reports on the last progress in the production of SiC power devices, which features can be interesting for this type of applications. The advantages of the SiC devices with respect to the...
Recently, the automatic test packet generation (ATPG) tool is proposed to verify a network for error conditions (e.g., incorrect firewall rules, software, hardware, and performance errors). However, this tool is not able to verify aggregated flows (i.e., flows having wildcards in some of their fields) for matching issues. In this paper, we propose a mechanism to verify aggregated flows in OpenFlow...
Modern cloud-based applications are becoming more communication-intensive, posing a challenge for data centers to supply sufficient bandwidth. Current data centers are not optimized for such cloud-based software services. In practice, due to the variability of traffic load, data centers may suffer from lower throughput, as well as higher latency, dramatically reducing quality of service (QoS). This...
Data center applications use multicast as an effective method to reduce bandwidth cost. However, traditional multicast protocols designed for IP networks are usually bottlenecked by the limited state capacity on switches. In this paper, we propose a scalable multicast solution on fat tree networks based on the observation that data center multicast traffic has strong heterogeneity. We propose to remove...
The paper describes the testbed to determine the effectiveness of an approach to build network storage using Software-Defined networks (SDN) OpenFlow. It is assumed that main protocol to SAN is iSCSI over local area network. Prototyping tools for managing network resources and data flows on the basis of SDN and testing environments based on Free and Open Source software. We describe experiments with...
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