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Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning. However, the decision for CAC is very challenging issue due to user mobility, limited radio spectrum, and multimedia traffic characteristics. In this paper, we propose a new CAC scheme which considers for acceptance decision except other parameters also the security...
Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning. However, the decision for CAC is very challenging issue due to user mobility, limited radio spectrum, and multimedia traffic characteristics. In this paper, we propose a new CAC scheme which considers for acceptance decision except other parameters also the security...
Cluster formation and cluster head selection are important problems in Wireless Sensor Networks (WSNs) and can drastically affect the network's communication energy dissipation. Moreover, in WSNs, the bad usage of the energy shortens the operation time of sensors and consequently the network lifetime. In this work, we propose a fuzzy-based simulation system for WSNs, in order to calculate the lifetime...
Several solutions have been proposed for improving the Quality of Service (QoS) in wireless cellular networks, such as Call Admission Control (CAC) and handover strategies. However, none of them considers the usage of different interfaces for different conditions. In this work, apart from using only Base Stations (BSs) as an important device of cellular networks, we propose a multi-interface approach...
In Wireless Sensor Networks (WSNs), cluster formation and cluster head selection are critical issues. They can drastically affect the network's performance in different environments with different characteristics. In order to deal with this problem, we have proposed a Fuzzy-based system for cluster-head selection and controlling sensor speed in Wireless Sensor Networks (WSNs). The proposed system...
In this paper, we study the effect of mobile sink and mobile sensors in WSN performance. The WSNs should allow a systematic deployment of sensor nodes including mobility among them. The disseminated data from the sensor nodes are gathered at the sink node. Data dissemination is the major source for energy consumption in WSNs. We consider goodput, depletion and Routing Efficiency (RE) parameters to...
Wireless Sensor Networks (WSNs) have become a hot research topic in academia as well as in industry in recent years due to its wide range of applications ranging from medical research to military. In this paper, we study the effect of mobile sink and mobile sensors in WSN performance. The WSNs should allow a systematic deployment of sensor nodes including mobility among the sensor nodes. The disseminated...
In Wireless Sensor Networks (WSN), cluster formation and cluster head selection have a lot of advantages, such as useful energy consumption, reducing communication overhead, transmit aggregated data and so on. They can affect the network's performance in different environments with different characteristics. In this paper, we have proposed a fuzzy-based algorithm for controlling sensor speed in Wireless...
In Wireless Sensor Networks (WSN), cluster formation and cluster head selection are critical issues. They can drastically affect the network's performance in different environments with different characteristics. In order to deal with this problem, we have proposed a Fuzzy-based system for cluster-head selection and controlling sensor speed in Wireless Sensor Networks (WSNs). The proposed system is...
Wireless Sensor Networks (WSNs) have become a hot research theme in academia as well as in industry in recent years due to its wide range of applications ranging from medical research to military. In this paper, we study the effect of IEEE 802.15.4 MAC standard on the performance of AODV protocol for WSNs environment with mobile sensors. The WSNs should allow a systematic deployment of sensor nodes...
Several schemes have been proposed for CAC and handover in wireless cellular networks. However, during the complexity of CAC and handover in wireless environment, many simplified models and assumptions are made. Also, the CAC and handover algorithms operating in real time have to make decisions without the luxury of repeated uncorrelated measurements or the future signal strength information. It should...
Vehicular Ad-hoc Networks (VANETs) are an instance of Ad-hoc networks, which are general-purpose distributed wireless networks interconnected without the need of any centralized infrastructure. VANETs are expected to be massively deployed in upcoming vehicles, because their use can improve the safety of driving and makes new forms of inter-vehicle communications possible as well. The simulation of...
In this paper, we implement a simulation system for single and multi-mobile sinks in wireless sensor networks considering TwoRayGround and Shadowing propagation models, using DSR routing protocol. We investigate how the sensor network performs in these cases. We used the good put and consumed energy metrics for performance evaluation. From simulations, we have shown that the good put of multimobile...
In VANETs and MANETs, the topology of the network changes very often, therefore implementation of efficient routing protocols is very important problem. In this paper, we investigated the good put of AODV, OLSR and DYMO routing protocols using CAVENET (Cellular Automaton based Vehicular Network). The simulation results show that the number of hops for DYMO is smaller than AODV and bigger than OLSR...
Sensor networks are sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment and in our physical and cyber infrastructure. In this paper, we present a comparison evaluation for mobile and static sensor nodes in Wireless Sensor Networks (WNSs) considering TwoRayGround and Shadowing propagation models. The simulation results have...
A Vehicular Ad-Hoc Network, or VANET, is a form of mobile ad-hoc network, which enables communication between vehicles and nearby road-side infrastructure through a wireless sensing device installed in the vehicles. In this paper, we present a simulation system for VANET called CAVENET (Cellular Automaton based Vehicular Network). In CAVENET, the mobility patterns of nodes are generated by an 1-dimensional...
Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning. However, the decision for CAC is very challenging issue due to user mobility, limited radio spectrum, and multimedia traffic characteristics. In our previous work, we implemented a fuzzy based CAC system called FACS-MP, which consider many priorities. In this paper,...
Several schemes have been proposed for CAC and handover in wireless cellular networks. However, during the complexity of CAC and handover in wireless environment, many simplified models and assumptions are made. Also, the CAC and handover algorithms operating in real time have to make decisions without the luxury of repeated uncorrelated measurements or the future signal strength information. It should...
Event detection is a major issue for applications of wireless sensor networks. In order to detect an event, a sensor network has to identify which application-specific incident has occurred based on the raw data gathered by individual sensor nodes. Sensor networks are a sensing, computing and communication infrastructure that are able to observe and respond to phenomena in the natural environment...
In this paper, we evaluate the performance of WSNs for single and multi mobile events using Two Ray Ground radio model and AODV protocol. We consider good put and routing efficiency metrics to evalute the performance of WSN. The simulation results have shown that for single mobile event, the good put is better than multi mobile events when the number of sensor nodes is higher. In case of boids model,...
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