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Software Defined Networking (SDN) is an approach developed to facilitate next generation computer networking by decoupling the traffic control system from the underlying traffic transmission system. One key focus in the transition of next-generation computer networking is the service management improvement of network connectivity services. Connectivity across the global digital network requires a...
AT&T is embarking on an exciting journey to revolutionize its network by transforming itself into a software company running the largest and most intelligent programmable cloud on the planet. Indeed, the network of Domain 2.0 (D2) will be intelligent software systems and applications operating on general-purpose commodity hardware [1]. This transformation will not only drive down CAPEX, OPEX and...
The effect of mismatch and parasitics in SAR architectures is analysed. Analytical study and simulations results show that there is a trade-off among resolution, silicon area, and power consumption for different architectures and technologies.
Software Defined Networking has been adopted to improve data center network efficiency. In SDN, the controllers are responsible for exchanging information with the switches to perform specific operations such as data forwarding. The transmission of control traffic usually uses networks different from data networks. However, building an additional wired network for the control traffic leads to high...
The software-defined networking (SDN) architecture has been widely deployed in data centers to support diverse cloud services. In order to provide fast access for flow table lookup, SDN switches usually use ternary content addressable memory (TCAM) to store their routing rules given by a controller. However, the number of TCAM entries is relatively small due to its high cost and high energy consumption...
Software defined network (SDN) is an emerging network architecture which offloads the control logic of the network from the underlying forwarding devices to a centralized controller. This centralized control intelligence software defines the behavior of the network. However, the programmability and centralization of the SDN architecture introduce potential security concerns. In this paper, we first...
The emerging technology of Software–Defined Networking (SDN) affords a platform and architecture which is dynamic, manageable, cost-effective, and adaptable, making it ideal for many applications that are high-bandwidth and dynamic in nature. As this technology grows and matures, there is a need for cybersecurity applications to be designed, developed and evaluated. In this paper, we propose a development...
In this paper, we propose techniques for securing Software Defined Networks(SDN). We describe the design of a security architecture that makes use of security applications on top of the SDN Controller to specify fine granular security policies based on domain wide knowledge of the domain and Security Agents to enforce these policies in the switches in the data plane. We have extended the Open Flow...
We present ConVenus, a system that performs rapid congestion verification of network updates in software-defined networks. ConVenus is a lightweight middleware between the SDN controller and network devices, and is capable to intercept flow updates from the controller and verify whether the amount of traffic in any links and switches exceeds the desired capacity. To enable online verification, ConVenus...
In this paper a novel architecture for control system design in networked environment is presented, where the consistent distribution of the control system functionalities is proposed to the dedicated time-aware system components. The sensing, actuating and algorithmic functionalities are uniformly encapsulated into the passive system components utilized as a network-accessible service groups. Service...
Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement...
All real-time services provided by the IP Multimedia Subsystem (IMS) require QoS mechanisms to avoid traffic congestion. Recently, the Software Defined Networking (SDN) paradigm has emerged to enable dynamic network resources, and then a way to perform QoS management. The paper presents an approach to integrate the IMS with the SDN paradigm. The work is motivated by the lack of QoS management of real-time...
Software-Defined Networking (SDN) enables decoupling of the data plane from the control plane on network devices. This approach differs from the traditional networking architecture where both planes reside on the same network device. SDN offers flexibility, centralized control, reduced complexity and a dramatic decrease in network systems and equipment costs. OpenFlow (OF) is a widely used protocol...
Traditional firewalls are used to enforce network security policies at boundaries within a network. However, this can leave hosts vulnerable to attacks that originate from within the network they are part of. We leverage the flexibility of Software Defined Networking to turn the network infrastructure into a virtual firewall thus improving security across an entire network. We present ACLSwitch, a...
In this paper, we propose a policy driven security architecture for securing end to end services across multiple autonomous domain based SDN environment. We develop a language based approach to designing a range of security policies that are relevant for SDN services and communications. The design of a security architecture that enables secure routing of packets based on the specified security policies...
This paper introduces a new controller for dual-user training systems, designed by way of an energy based approach. Dual-user training systems are useful for supervised hands-on training when a trainer shows the right gestures to a trainee and where the forces to apply on the tools are difficult to dose. An energy shared control (ESC) based architecture is proposed, based on an intrinsically passive...
Nowadays, Software-Defined Networking (SDN) is a powerful architectural model, decoupling control and forwarding planes through the abstraction of network elements and functionalities. As known, in SDN networks the controller is the key element since the intelligence of the network is centralized. Hence, the deployment of network services, such as QoS, traffic engineering and traffic recovery, requires...
To deploy Software-Defined Networking (SDN) in a large-scale network, cluster-based distributed SDN controllers were proposed, which enable performance scaling by simply adding a new server in the cluster. However, loads caused by many control messages from many kinds of SDN applications have not been widely studied so far. In this paper, we show an architecture of a distributed SDN controller where...
When a cloud scales out to a large size, the cloud network potentially extends to a multi-domain structure, and needs to keep its scalability, consistency and flexibility. Software-Defined Networking (SDN) provides the technical possibility to realize the requirements. However, the existing studies of SDN focus on the perspective of network builders and managers, different from the perspective of...
New imaging stations aim for high spatial and temporal resolution and are characterized by ever increasing sampling rates and demanding data processing workflows. Key to successful imaging experiments is to open up high-performance computing resources. This includes carefully selected components for computing hardware and development of advanced imaging algorithms optimized for efficient use of parallel...
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