Tag Archive: 'Omnet Tutorial'

Profiling Wireless Resource Usage for Mobile Apps via Crowdsourcing-based Network Analytics

The rapid growth of mobile app traffic brings huge pressure to today’s cellular networks. While this fact is commonly concerned by all the mobile carriers, little work has been done to analyze app’s network resource usage. In this paper, we for the first time profile network resource usages for mobile apps by establishing a quantitative […]

Estimation of Backlog and Delay in OFDM/ TDMA Systems with Traffic Policing Through Network Calculus

In this paper, we firstly propose a policing algorithm based on multifractal traffic modeling, evaluating its performance in comparison to other algorithms. Further, we present an approach based on Network Calculus for estimating quality of service parameters, such as mean queue length (backlog) and delay. We analyze these two parameters for an OFDM/TDMA based simplified […]

Space-time Queuing Theoretic Modeling of Opportunistic Multi-hop Coexisting Wireless Networks With and Without Cooperation

In this paper, we characterize the average end-toend delay in an opportunistic multi-hop secondary cognitive radio network overlaid with a primary multi-hop network. Nodes in both networks use random medium access control (MAC) scheme with exponentially distributed back-off. We first model the network as a two-class priority queuing network and use queuing-theoretic approximation techniques to […]

Frequency Partitioning Methods to Mitigate Cross-Tier Interference in Two-Tier Femtocell Networks

Femtocells are attractive candidates for future cellular systems since they can greatly improve coverage and data rates. However, severe interference may occur and hinder the improved system performance due to a large number of femtocells sharing frequency bands with the macrocell. In this paper, we consider the interference problem in two-tier femtocell networks and propose […]

A novel static external network equivalencing method for protection studies on Iran Transmission Grid

In this paper, a novel static external network reduction appropriate for fault studies and relay coordination in transmission system is proposed. By applying the proposed method to IEEE 14-bus network and Hormozgan Transmission Network, its major advantages, simplicity and accuracy (less than 5% error) have been confirmed in comparison with accurate classic and approximate engineering […]

Data-based predictive control for networked non-linear systems with two-channel packet dropouts

This study is concerned with the data-based control of networked non-linear control systems with random packet dropouts in both the sensor-to-controller and controller-to-actuator channels. By taking advantage of the characteristics of networked control systems such as the packet-based transmission, timestamp technique, as well as smart sensor and actuator, a data-based networked predictive control (DBNPC) method […]

An Approach to Support the Interoperability of Intelligent Grouping and Resource Sharing (IGRS) and Universal Plug and Play (UPnP) in Home Network Environment

To achieve interconnection and interoperability among different devices in home network environment, such as TV, PAD, and computer. Several digital home network protocol standards, such as UPnP, Java Intelligent Network Infrastructure (Jini), IGRS, etc, are proposed. But, devices based on these different protocols cannot discover or control each other, so it is very important to […]

Outage Analysis of Cognitive Opportunistic Relay Networks With Direct Link in Nakagami- mFading

This letter presents a unified framework for the outage performance analysis of cognitive opportunistic amplify- and-forward relay networks with a direct link using maximum ratio combining (MRC) and selection combining (SC) schemes in the presence of multiple primary receivers. Specifically, we derive unified closed-form expressions of outage probability and asymptotic outage behavior for both the […]

Enabling Cooperative Relaying VANET Clouds Over LTE-A Networks

This paper addresses the area of heterogeneous wireless relaying vehicular clouds. We devise an advanced vehicular relaying technique for enhanced connectivity in densely populated urban areas. We investigate the performance of a transmission scheme over a Long-Term Evolution-Advanced (LTE-A) network where vehicles act as relaying cooperating terminals for a downlink session between a base station […]

BUS-VANET: A BUS Vehicular Network Integrated with Traffic Infrastructure

With the development of wireless communications, Vehicular Ad Hoc Network (VANET) has received considerable attention on information sharing and data delivery services. In order to collect and control traffic conditions, Intelligent Transportations Systems (ITS) has deployed a number of Road Side Units (RSUs) along the roads to collect and deliver traffic information to the Traffic […]