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To meet quality of service requirements on the uplink of future cellular networks, we need to exploit inter-cell interference among users eligible for cooperation. Cloud Radio Access Network (C-RAN) architecture is particularly favorable to realize cooperation between users in neighboring cells, since signal detection is realized in the same processing unit. The novel technology of Software Defined...
Traffic congestions have huge impact on urban transportation and are even more problematic when emergency vehicles are present, their fast travel requirements disrupting regular traffic. The aim of this study is to formulate an agent based simulation perspective on aiding the design of complex and distributed control systems, such as the one facilitating the arrival of the emergency vehicles to accident...
This paper addresses an interworking model of transport network controllers including SDN and Non-SDN controllers. It has an overview of recent research and standard activities, classifies types of transport network controllers, and proposes a SDN and Non-SDN interworking model. For verifying the proposed interworking model, it leads to a 3-tiers reference model from the interworking architecture...
In the last couple of years Software Defined Network (SDN) have come into existence which empowers network operators with more flexibility to manage and program their network. This type of network solves the limitation of legacy networks. Data plane and control planes are separated from each other as a result data plane devices simple act as a packet forwarding device and leaving the decision making...
Single controller implementation of SDN has many problems related to single points of failure, computational complexity growth, reliability and scalability. To solve these problems, multi-controller implementation of Software Defined Network has been introduced. Multiple controller implementation of the SDN control plane for large networks environment solves the scalability and reliability issues...
With the increasing complexity of modern communications networks, Software Defined Networking (SDN) has been proposed as an approach that can solve a variety of real network management problems. The separation between the control plane and the data plane within SDN brings the flexibility which can aid network operators to reduce complexity, cost, and improve the user experience. In this paper, we...
Software Defined Network (SDN) is an emerging paradigm for flexible network design and implementation. Availability metric of SDNs is critically demanding further studies. This paper aims to propose hierarchical models to assess the availability of SDNs. We incorporate various failure modes and recovery behaviors in the SDN including (i) link failures at network level, and (ii) software and hardware...
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 use of Network Function Virtualization to run network services in software enables Software Defined Networks to create a largely software-based network. We envision a dynamic and flexible network that can support a smarter data plane than just simple switches that forward packets. This network architecture needs to support complex stateful routing of flows where processing by network functions...
In the control of the PEM (Proton Exchange Membrane) fuel cell, the existence of both deliberative and reactive processes that facilitate the tasks of control resulting from a wide range of operating scenarios and range of conditions it is required. The latter is essential to adjust its parameters to the multiplicity of circumstances that may occur in the operation of the PEM stack. In this context,...
In the article the question of building information control system with fault-tolerant architecture is considered. It is proposed to ensure fault tolerance by combining methods of performance reserve and distributed(decentralized) dispatching. An example of the reconfiguration of the system built on the basis of the proposed architecture is also considered.
In this paper we take a closer look at the operation of software defined networking (SDN) in intra-domain networks. The focus is on the dependability issues related to interworking of SDN controllers, network OS (NOS), and forwarding in the data plane. Both the separation of the control and data planes, and the (virtually) centralized control processes, are challenging from a dependability perspective...
Emerging Software Defined Networking (SDN) technology has provided excellent flexibility to large-scale networks in terms of control, management, security, and maintenance. With SDN, network architectures can be deployed and maintained with ease. New trends in computing (e.g., cloud computing, data centers, and virtualization) can seamlessly be integrated with the SDN architecture. On the other hand,...
Nowadays there are already a multitude of various wearable devices, and more wearables are expected to come onto the market in the next few years. Much of the current research in wearable computing has fallen into two basic categories, device-centered and application-centered, which are however dedicated to specific applications, and without the flexibility and scalability sufficient to support more...
With the explosive growth of applications and application traffic, data centers networks are challenged in network utilization and network performance, which is crucial to guarantee the efficiency of computing and storage resources of data center servers. Recently, software defined network has been exploited to manage the network resource in a center controller, which provides opportunities to optimize...
The Internet-of-Things (IoT) envisions a world where billions of everyday objects and mobile devices communicate using a large number of interconnected wired and wireless networks. Maximizing the utilization of this paradigm requires fine-grained QoS support for differentiated application requirements, context-aware semantic information retrieval, and quick and easy deployment of resources, among...
With the introductions of the development and further applications of SDN network, this paper describes a new architecture based on the OpenFlow protocol which is consist of four virtual levels: the application layer, the virtual platform, the control layer and the physical layer. And by studying the features of SDN and the OpenFlow protocol, it makes a theoretical foundation and an effective solution...
This paper describes a novel agent-based battery management system for large battery packs. The proposed architecture enables a more resilient and flexible approach, where, for example, cell balancing is achieved through local coordination of neighboring cells. A framework for co-simulation Matlab/Simulink and JADE is also proposed to enable simulations where the physical system is modeled in Simulink...
In this work a control system for restoration reserve providers is proposed in which optimal biddings of restoration reserve capacity are made based on the predicted flexibility of the reserve resources within the portfolio of the reserve provider. It is assumed that the gate closure time for submitting reserve capacity bids is 1 hour before activation time. The reserve capacity bids need to be formed...
A Cyber-Physical System (CPS) is defined as integrations of computation and physical processes. In CPS, small embedded devices are used to monitor and manage the physical process. Because of these physical devices with limited resources, it is impossible to perform complex calculations and processing. In view of this situation, we apply Service-oriented Architecture (SOA) concepts to CPS, called a...
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