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Interconnects play a critical role in various networking environments including data center networks, high performance computing systems, networks-on-chip, etc. An important design concern of interconnects is the hardware cost, especially when the scale increases. In order to achieve lower hardware cost, a lot of previous work leverages a tradeoff between the cost and the performance. In this paper,...
This paper evaluates switch-over time of a failure protection in a software-defined network (SDN). In the area of network protection, it is very necessary to overcome the link failure. This failure may cause the traffic interrupted and the packets are lost in the network. In this case the time of recovery of the failure should be as short as possible. In case of open shortest path first (OSPF) network,...
This paper shows the effectiveness of the system that controls the network route based on social information. An automatic route control is performed with the network virtualization node FLARE that uses VLAN coupling between each base of the wide area network test bed called JGN-X as a platform.
Software-defined networking (SDN) has been proposed as a new networking paradigm which separates the control and data forwarding planes. The controllers deployed as centralized network control entities are crucial for meeting the performance and efficiency requirements of these systems. The placement of these network entities, switch assignment and their load-aware operation are challenging research...
In the recent past, Zambia has faced a critical power deficit due to low water levels in the Kariba Dam, which is a main source of electricity. This problem has negatively affected the economy. One way to mitigate this problem is by diversifying to renewable solar energy. Though the government is making efforts to diversify, the current photovoltaic (PV) systems are not efficient in managing the energy...
The problem of disturbance decoupling in nonlinear hybrid systems is investigated. The hybrid systems under consideration consist of finite automaton, the set of nonlinear difference equations and the so-called mode activator that coordinates the action of the other two parts. The hybrid controller is found that solves the disturbance decoupling problem via measurement feedback under certain (sufficient)...
A double input DC-DC converter based on Zero-Voltage Transition technique enough to attract power from two distinct sources serving a joint dc-bus is projected. This converter belongs to higher-order family behaving as buck converter with one dc source and it also performs as both buck and boost converter with another source. Here the two sources either independently or concurrently deliver power...
In this 21st century smart grids are considered as one of the most efficient ways of transmission of electricity. Electric spring is one of the elements in smart grid technology which improves the power quality and reliability of the power grid. The system consists of parallel operation of Non-critical loads with Critical load that are sensitive to voltage fluctuations. The voltage of Critical load...
The paper deals with the problem of modeling of parallel spatial switching systems. We propose a new crossbar switch structure with adaptive control of interconnection. The set-theoretic, automata model, and a model based on Petri net has been presented.
Hand gestures recognition offers an alternative and natural input interface to control the consumer devices thanks to the latest advancement in the vision systems. For example, it can replace the remote control of television or set top box. However, the power consumption is a big issue in such applications and seriously affects its usability in standby modes. In this paper, we analyze if power consumption...
Hybrid vehicular networks (HVNs) are foreseen to provision effective solutions in terms of broadcast services, increased capacity and expanding coverage. Cooperative Awareness Messages (CAMs) are one of the standard means of exchanging information among connected vehicles and smart road infrastructures. Timely dissemination of CAMs is a non-trivial challenge, particularly, in congested areas. This...
Dynamic slicing and spectrum-based fault localization (SFL) are widely used as fault localization methods. While these methods are effective for localizing a faulty statement in a program, they have some practical drawbacks. One of the drawbacks with dynamic slicing is that if a program is large, the sliced program will also remain large in general. One of the drawbacks with SFL is that the suspiciousness...
Hybrid vehicular networks (HVNs) are foreseen to provision effective solutions in terms of broadcast services, increased capacity and expanding coverage. Cooperative Awareness Messages (CAMs) are one of the standard means of exchanging information among connected vehicles and smart road infrastructures. Timely dissemination of CAMs is a non-trivial challenge, particularly, in congested areas. This...
Internet service providers (ISPs) have been facing heavy competition to attract more users in the mobile data market, along with growing operational costs. Most mobile data plans charge users a fixed fee for a monthly data quota, and any unused data at the end of each month will be wasted. In the beginning of 2015, both AT&T and T-Mobile reinstated rollover data plans with constrained eligibility...
Control theory and SDN (Software Defined Networking) are key components for NFV (Network Function Virtualization) deployment. However little has been done to use a control-theoretic approach for SDN and NFV management. In this paper, we describe a use case for NFV management using control theory and SDN. We use the management architecture of RINA (a clean-slate Recursive InterNetwork Architecture)...
In CPU scheduling various algorithms exist like FCFS (First come first serve), SJF (Shortest job first), SRTF (Shortest remaining time first), Priority Scheduling, Round Robin (RR), MLQ (Multilevel queue), MLFQ (Multilevel feedback queue) scheduling. Multilevel Feedback Queue (MLFQ) algorithm allows the switching of processes between queues depending on their burst time. The processes switch to the...
This paper deals about the concept of space vector pulse width modulation for DC-AC converter. Converter used here is nothing but a three phase inverter. Six pulses are generated for triggering switching devices used in the inverter. Based on these pulses inverter is delivering its three phase output voltage in the load terminals. Star connected resistive and capacitive load is used here in the inverter...
This paper presents a new topology of 3-Phase Hybrid Matrix multilevel inverter with reduced number switches and electrical isolation. Each phase consists of two cascaded units; the first unit is used for level generation whereas the second one doubles the number of levels and provides electrical isolation and step up the voltage to required range. The proposed topology show significance in design,...
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