Tag Archive: '2015 Omnet++ Projects'

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 […]

High-Throughput Reliable Multicast in Multi-Hop Wireless Mesh Networks

This paper presents a cross-layer approach for enabling high-throughput reliable multicast in multi-hop wireless mesh networks. The building block of our approach is a multicast routing metric, called the expected multicast transmission count (EMTX). EMTX is designed to capture the combined effects of MAC-layer retransmission-based reliability, wireless broadcast advantage, and link quality awareness. The EMTX […]

Dynamic Spectrum Allocation for the Downlink of OFDMA-Based Hybrid Access in Cognitive Femtocell Networks

Cognitive femtocell has emerged as one of the exciting technologies to solve the indoor coverage problem in the future cellular networks. Recently, lots of technical issues for the cognitive femtocell have been studied, e.g., spectrum sharing, interference mitigation. However, the incentive method that is very important for practical hybrid access cognitive femtocell deployment has not […]

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 […]

Coexistence of ZigBee-based WBAN and WiFi for Health Telemonitoring Systems

The development of telemonitoring via wireless body area networks (WBANs) is an evolving direction in personalized medicine and home-based mobile health. A WBAN consists of small, intelligent medical sensors which collect physiological parameters such as EKG (electrocardiogram), EEG (electroencephalography) and blood pressure. The recorded physiological signals are sent to a coordinator via wireless technologies, and […]

QOF: QoS Framework Based on OpenFlow

The growing emergence of a variety of network applications have stringent Quality of Service (QoS) requirements which cannot be always met by the best-effort Internet. To provide QoS, several QoS frameworks have been explored over last two decades, but none of them has been truly successful and globally implemented. This paper proposes QOF, a novel […]

Analysis and Optimization of Random Sensing Order in Cognitive Radio Networks

Developing an efficient spectrum access policy enables cognitive radios to dramatically increase spectrum utilization while ensuring the predetermined quality of service levels for primary users (PUs). In this paper, the modeling, performance analysis, and optimization of a distributed secondary network with a random sensing order policy are studied. Specifically, secondary users (SUs) create a random […]

Evaluating the Impact of Registered Power Zones Incentive on Wind Systems Integration in Active Distribution Networks

For the better integration of distributed and renewable generation, new investments in innovative distribution networks, such as active distribution networks and smart grids (SGs), are required. Regulators should decide what incentives are desirable to create a flexible economic regulatory framework that can drive distribution system operators to invest in innovation and in active distribution networks. […]

QoS-based WebRTC access to an EPS network infrastructure

This paper describes a method to support QoS using WebRTC-based Clients integrated in mobile devices conformed to 3GPP Rel. 8 Public Land Mobile Network infrastructure. To enrich the experience for mobile customers using this upcoming technology, the article focuses on the merging of the technical capabilities arising from both the Evolved Packet System inherent QoS […]

Dynamic Traffic Grooming in Sliceable Bandwidth-Variable Transponder-Enabled Elastic Optical Networks

Traffic grooming has evolved to present some new features in sliceable bandwidth-variable transponder enabled elastic optical networks (SBVT-EON). One of the new features is “optical traffic grooming,” in which multiple optical flows from/to different sources/destinations can be groomed onto a sliceable transponder. When establishing a new connection request in SBVT-EON, a key problem is how […]