Tag Archive: 'opnet tutorial'

Implementing attacks for modbus/TCP protocol in a real-time cyber physical system test bed

To understand security vulnerabilities of communication protocols used in power systems, a real-time framework can be developed to conduct vulnerability studies. The framework should implement protection mechanisms against vulnerabilities and study their effectiveness. In this paper, a realtime cyber-physical framework or test bed is presented. It integrates a real-time power system simulator and a communication […]

Impacts of sub hub on connectivity of IEEE 802.15.4 in healthcare environments

In this paper, we consider IEEE 802.15.4 based wireless body area sensor networks(WBASN) in the healthcare environment. Connectivity is a critical constraint in the healthcare environment. In particular, disconnection from a sensor hub is a significant problem that leads to sensor node orphaning. To address this, we propose to use a sub hub designed to […]

Routing-Aware Design of Indoor Wireless Sensor Networks Using an Interactive Tool

In this paper, we present an interactive design tool that can assist rapid prototyping and deployment of wireless sensor networks for building automation systems. We argue that it is possible to design networks that are more resilient to failures and have longer lifetime if the behavior of routing algorithms (RAs) is taken into account at […]

C22. Avionics Full-duplex switched Ethernet (AFDX): Modeling and simulation

This paper develops a comprehensive simulation model for Avionics Full-duplex switched Ethernet (AFDX) network based on OPNET platform. Accordingly, the performance of AFDX networks is analyzed. The effect of frame size, switching delay and changing frames transmission order on the AFDX network performance are investigated. It is found that using faster switches and small frame size reduces […]

A distributed energy efficient packet transmission algorithm for the IEEE802.11 WLAN

IEEE802.11 based WLAN networks are considered to be the default broadband access network supporting a range of traffic sources. In this paper a dual parameter based cost function is proposed which can be used to determine the transmission data rate for a transmitting WLAN device in order to maximize the energy efficiency of an infrastructure […]

SDN and ForCES based optimal network topology discovery

Software-defined Networking proposes an alternative paradigm on network programmability based on the separation of control and forwarding planes. Discovering network elements in a dynamic and optimized fashion, able to cope with the ever-growing network traffic, is a key requirement for SDN networks, in order to ensure a data center’s robustness and manageability. OpenFlow’s approach for […]

Minimizing resource protection in IP over WDM networks: Multi-layer shared backup router [invited]

Optical networks and Internet Protocol/Multi-Protocol Label Switching (IP/MPLS) based networks have been traditionally designed and operated by separate departments of network operators. Likewise, both layers have always represented different business areas for system providers, which maintain different product lines for each of them. However, network operators have an IP/ MPLS over WDM architecture. The main […]

Optimized Technique for Capacitated Minimum Forest Problem In Wireless Sensor Networks

Recent advances in low power radios and sensor technology have enabled the pervasive deployment of sensor networks consisting of sensor nodes that are very small in size and relatively inexpensive. Wireless Sensor Networks (WSNs) have been seen more as a solution to large scale tracking and monitoring applications, because their low data rate, low energy consumption and […]

An Information-Centric Communication Infrastructure for Real-Time State Estimation of Active Distribution Networks

The evolution toward emerging active distribution networks (ADNs) can be realized via a real-time state estimation (RTSE) application facilitated by the use of phasor measurement units (PMUs). A critical challenge in deploying PMU-based RTSE applications at large scale is the lack of a scalable and flexible communication infrastructure for the timely (i.e., sub-second) delivery of […]

Fronthaul-constrained cloud radio access networks: insights and challenges

As a promising paradigm for fifth generation wireless communication systems, cloud radio access networks (C-RANs) have been shown to reduce both capital and operating expenditures, as well as to provide high spectral efficiency (SE) and energy efficiency (EE). The fronthaul in such networks, defined as the transmission link between the baseband unit and the remote radio head, requires a high […]