CORD is a new design of telco central office that replaces closed and proprietary hardware with software running on commodity servers, switches, access devices. It allows network operators to benefit from both the economies scale (infrastructure constructed few building blocks) agility (the ability rapidly deploy elastically services) cloud providers enjoy today. This article introduces architecture describes an open reference implementation available for evaluation.

IP and Transport networks are controlled operated independently today, leading to significant Capex Opex inefficiencies for the providers. We discuss a unified approach with OpenFlow, present recent demonstration of control plane OpenFlow enabled IP/Ethernet TDM switched networks.

OpenFlow & Software Defined Networking (SDN) ideas offer drastically reduced complexity in the control plane, increased programmability and extensibility, a gradual adoption path; all significant advantages over GMPLS for dynamic interaction between packet circuit networks.

OpenFlow is presented as a unified control plane and architecture for packet circuit switched networks. We demonstrate simple proof-of-concept testbed, where bidirectional wavelength dynamically created to transport TCP flow.

We demonstrate MPLS Traffic Engineering (MPLS-TE) and MPLS-based Virtual Private Networks (MPLS VPNs) using OpenFlow [1] NOX [6]. The demonstration is the outcome of an engineering experiment to answer following questions: How hard it implement a complex control plane on top network controller such as NOX? Does global vantage point in make implementation easier than traditional method implementing every switch, embedded data plane? implemented major feature MPLS-TE MPLS-VPN just 2,000 lines...

We demonstrate a converged OpenFlow enabled packet-circuit network, where circuit flow properties (guarantee d bandwidth, low latency, jitter, bandwidth-on-demand, fast recovery) provide differential treatment to dynamically aggregated packet flows for voice, video and web traffic.

We propose a new approach to MPLS that uses the standard data plane and an OpenFlow based simpler extensible control plane. demonstrate this using prototype system for Traffic Engineering.

SDN Enabled Broadband Access (SEBA) is a large open-source development and integration project hosted by the Open Networking Foundation (ONF). Built using white-box hardware, merchant silicon, principles, SEBA brings benefits of virtualization cloudification to passive optical network (PON)-based broadband access networks for FTTH/FTTB deployments. Already in field trials with several Tier-1 operators, rapidly moving toward production readiness contributions from rich community vendors,...

There have been many attempts to unify the control and management of circuit packet switched networks, but none taken hold. In this paper we propose a simple way both types network using OpenFlow. The basic idea is that flow abstraction fits well with network, provides common paradigm for control, makes it easy insert new functionality into network. OpenFlow API underlying hardware, allows all routing, be defined in software outside datapath.

The Internet core today is completely based on IP routers. Circuits are only used to provide static point-to-point optical links between As others have recognized, current practice makes it hard take advantage of very high-speed, low-power circuit switches in the core. Despite many proposals mix packet switching with dynamic switching, none taken hold. In these times rapidly increasing traffic, and decreasing profits for ISPs, time rethink how backbones built. this paper, we propose replace...

This paper presents the design and evaluates system performance of one-kilowatt capacity asynchronous synchronous buck converter based solar-powered charging systems for battery-driven electric vehicles. The dc motor-operated three-wheeler rickshaw was taken testing systems, where a battery bank containing four series-connected sub-colloid storage type batteries each with 12V, 120Ah has been used. PSIM simulation software used to evaluate performances these two types systems. Hardware...

This paper proposes an innovative approach to utilizing Buck converter as ideal Power Factor Correction (PFC) controller where variable width Pulse Width Modulation (PWM) switching signals are generated and implemented reliably control the voltage current conversion phenomena. The developed topology is tactically utilized design efficacious grid-connected electric vehicle charger with substantially ameliorated line so that system loss can be averted in case of AC-DC charging circuits. In...

This study focuses on the implementation of web based low cost yet effective remote laboratory system for engineering education to utilize limited resources improving student's practical knowledge as well self learning ability. The proposed provides experience students in field power electronics and telecommunications. lab allows perform experiment by controlling various experimental apparatus real time from their home or any preferred location using internet connection. Several experiments...

We propose a sublambda traffic-grooming scheme on wavelength-division-multiplexing ring networks, named optical burst transport. The network protocol and architecture are designed to support dynamic bandwidth allocation, which is more reasonable for bursty data traffic. To verify our architecture, we build testbed supports burst-mode transmission. Also, transmit streaming video over Ethernet as an application

This Paper is aimed to present the design and implementation of a one kilowatt capacity single phase grid tie photovoltaic inverter. The proposed simulation process this system in PSIM environment. reason for choosing software that it provides solar module facilities. For inverter some special types consideration, like reference voltage creation synchronise inverter's output with grid, PWM (Pulse Width Modulation) signal by comparing triangular wave, designed simulated precisely. According...

<p>This paper documents an efficient, cost-effective and sustainable grid-connected electric vehicles (EVs) battery charger based on a buck converter to reduce the harmonics injected into mains power line. To utilize switching as effective factor controller (PFC), inverse sinusoidal pulse width modulation (ISPWM) signals have been applied. A mathematical relationship between sending-end duty ratio of has presented. ensure sustenance proposed method, simulation model charging system...

OpenFlow is proposed as an architectural platform and a unified control plane for packet circuit networks, with the main goal of simplifying network management while fostering innovative change in them.

Fiber based access networks are recognized as promising technologies for solving broadband bandwidth bottlenecks. TDM-PONs, which passive and non-reconfigurable, the most widely deployed type of fiber today. However, due to their nature, TDM-PONs encounter several issues such inflexible coverage, lack intelligence control, inability counter security attacks. Based on current in optical networks, we propose a novel non-volatile, reconfiguration node. The proposed remote node can reconfigure...

We discuss the motivations and progress made towards development of a unified control architecture based on Software Defined Networking (SDN) for packet circuit switched networks.

In Bangladesh, approximately 3900 square miles of entire length is surrounded by 700 rivers including tributaries. Around 770,000 inland and 510,000 marine fishermen survive in this country, whose income entirely depends on fisheries. Bangladeshi mainly use trawler for fishing purpose sea river. Those boats require electric power at night lighting purposes. Currently, a trawler, supplied battery which charged through dynamo synchronized with engine. These dynamos diesel to serve power....

In this paper, we introduce a novel passive and wavelength selective remote node specifically designed to enable security countermeasure in PONs. The central office could physically isolate problem makers from the network without disrupting regular links by issuing specific control signal device. With its nature, countermeasure-enabled device is also natural candidate WDM-PON node. To demonstrate feasibility, discrete version of implemented. addition capability, new kind PON restoration...

To provide electricity to the peoples of unelectrified remote off-grid areas, household standalone photovoltaic (PV) system is an impressive solution. However, traditional PV systems use ordinary PWM or square waver inverters, which a poor quality output responsible for rapid reduction life cycle electrical appliances. This paper presents design and development one-kilowatt capacity single phase pure sine wave inverter using Sinusoidal Pulse Width Modulation (SPWM) with voltage having same...

As the power grid is improving and increasing in size day by day, new systems must be developed designed to control negate newly arising problems. This paper proposes a system stabilize voltage fluctuations which often occur some situations. For example, when large number of distributed generating resources are connected load fluctuates rapidly. A has been proposed here as solution problem under problems grid. Whenever units such photovoltaic cells micro turbines grid, increases above upper...