Evjola Spaho

Evjola Spaho
Universiteti Politeknik i Tiranës · Department of Electronics and Telecommunications

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171
Publications
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1,327
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Publications

Publications (171)
Article
Recently, low power wide area networks are attracting a lot of attention by the research community. They are wireless technologies characterized by large coverage area, low bandwidth and long battery life. One of these low power wide area networks technologies, the long range wide area network, can be used for different monitoring applications for...
Article
Full-text available
Waste management is one of the main concerns with our environment which impacts the health of our society. A significant amount of waste disposed by people are organic material. Kitchen wastes like food scraps disposed by families and restaurants, are becoming in large amounts and the natural capacity of the environment cannot assimilate them. Ther...
Article
Full-text available
In this paper, we use the Opportunistic Network Environment environment to simulate a data collection application using a Delay Tolerant Network (DTN). A group of sensor nodes sense data from the environment and send these data to a destination node that collects them for statistical and data analysis purposes. Pedestrians and cyclist equipped with...
Chapter
In this paper, we propose an intelligent approach for resource management in Vehicular Ad Hoc Networks (VANETs) using Software Defined Networking (SDN) and Fuzzy Logic (FL) approaches. We introduce a layered Cloud-Fog-Edge computing architecture in SDN-VANETs which is coordinated by the SDN Controller (SDNC). A fuzzy based system implemented in SDN...
Chapter
In this paper, we enhanced the Binary Spray and Wait (B-S&W) routing protocol and create two versions of Spray and Wait (S&W-V1 and S&W-V2) and evaluate and compare their performance in a Delay Tolerant Network (DTN). The network is created from pedestrians, cars and buses of public transport, equipped with smart devices that move and exchange info...
Article
Vehicular ad hoc networks (VANETs) face several technical challenges in deployment and management due to variable capacity of wireless links, bandwidth constrains, high latency and dynamic topology. Cloud, fog, and edge computing are considered a way to deal with these communication challenges. On the other hand, software defined networking (SDN) c...
Chapter
In this paper we evaluate the performance of Epidemic, Spray and Wait routing protocols and their versions with congestion control and Epidemic with TCP in Delay Tolerant Networks. For evaluation we used three different mobility models: Random Waypoint (RWP), Steady State Random Waypoint (SSRWP) and a Tirana city map based movement. We used deliver...
Article
Full-text available
The opportunistic networks are a subclass of delay-tolerant networks where communication opportunities (contacts) are intermittent and there is no need to establish an end-to-end link between the communication nodes. The internet of things (IoT) present the notion of large networks of connected devices, sharing data about their environments and cre...
Chapter
Vehicular Communications are an emerging technology, with a broad potential on applications on and off the road. One on-road application that has a lot of interest is Cooperative Adaptive Cruise Control (CACC), often referred to as platooning. Vehicles travel behind each-other, mostly by following the leading vehicle, which manages the platoon, by...
Chapter
In this paper, we evaluate the energy consumption of different routing protocols in a Delay Tolerant Network (DTN). Seven groups with three stationary sensor nodes for each group sense the temperature, humidity and wind speed and send these data to a stationary destination node that collects them for statistical and data analysis purposes. The oppo...
Conference Paper
In this paper, we evaluate the performance of Epidemic, Spray and Wait, and their versions with congestion control and Epidemic with TCP in two different set of simulations. In the first set of simulations, we evaluate the effect of network node density for map-based mobility model considering Tirana city map. In the second set of simulations, we c...
Conference Paper
In Wireless Sensor and Actor Networks (WSANs), sensors and actors collaborate together to get the information about the physical environment and perform appropriate actions. In order to provide effective sensing and acting, a distributed local coordination mechanism is necessary among sensors and actors. The degree of errors encountered during data...
Conference Paper
In this paper we evaluate the performance of Epidemic, Spray and Wait and their versions with congestion control and Epidemic with TCP for Random Waypoint (RWP) and Steady State Random Waypoint (SSRWP) mobility models. For performance evaluation, we used delivery ratio, hop count, average delay and average buffer occupancy metrics. Simulations are...
Article
Opportunistic networks (Oppnets) are a subclass of delay‐tolerant networks where communication opportunities (contacts) are intermittent and there is no need to establish an end‐to‐end link between communication nodes. The Internet of Things (IoT) presents the notion of large networks of connected devices, sharing data about their environments and...
Article
Wireless Sensor and Actor Network (WSAN) is formed by the collaboration of micro-sensor and actor nodes. Whenever there is any special event i.e., fire, earthquake, flood or enemy attack in the network, sensor nodes have responsibility to sense it and send information towards an actor node. The actor node is responsible to take prompt decision and...
Article
In this paper, we evaluate and compare the performance of different routing protocols in a many-to-one communication within a Vehicular Delay Tolerant Network (VDTN). Seven groups with three stationary sensor nodes sense the temperature, humidity and wind speed and send these data to a stationary destination node that collect them for statistical a...
Article
Purpose The purpose of this work is to implement an Ambient Intelligence (AmI) testbed in order to improve human sleeping conditions. Design/methodology/approach The implemented testbed is composed of Sensor Node, Sink Node and Actor Node. As Sensor Node, we use Microwave Sensor Module (MSM) called DC6M4JN3000, which emits microwaves in the dire...
Chapter
The opportunistic networks are a subclass of delay-tolerant networks where communication opportunities (contacts) are intermittent and there is no need to establish an end-to-end link between the communication nodes. The Internet of Things (IoT) present the notion of large networks of connected devices, sharing data about their environments and cre...
Chapter
Wireless Sensor and Actor Network (WSAN) is formed by the collaboration of micro-sensor and actor nodes. Whenever there is any special event i.e., fire, earthquake, flood or enemy attack in the network, sensor nodes have responsibility to sense it and send information towards an actor node. The actor node is responsible to take prompt decision and...
Chapter
In this paper, we integrate a Wireless Local Area Network (WLAN) with a Delay Tolerant Network (DTN) to improve the network performance when the network is congested or communication link problems occur. We evaluate the performance under different scenarios for three routing protocols. Simulations are conducted with the Opportunistic Network Enviro...
Chapter
Ambient Intelligence (AmI) deals with a new world of ubiquitous computing devices, where physical environments interact intelligently and unobtrusively with people. AmI environments can be diverse, such as homes, offices, meeting rooms, schools, hospitals, control centers, vehicles, tourist attractions, stores, sports facilities, and music devices....
Book
This book presents original contributions on the theories and practices of emerging Internet, data and Web technologies and their applicability in businesses, engineering and academia, focusing on advances in the life-cycle exploitation of data generated from the digital ecosystem data technologies that create value, e.g. for businesses, toward a c...
Conference Paper
With the advancement of Vehicular technologies, Vehicular Adhoc Networks will soon be a reality in our daily lives. However in order to fully take advantage of the new applications, we need to consider different parameters, while implementing the network. Road patterns, types of data, vehicle density and so on are some parameters that can affect th...
Conference Paper
Wireless Sensor and Actor Networks (WSANs), refers to a group of sensors and actors that get the information about the physical environment and perform appropriate actions. In order to provide effective sensing and acting, a distributed local coordination mechanism is necessary among sensors and actors. In this work, we propose a fuzzy-based system...
Conference Paper
In this paper, we evaluate the effect of node density and node movement model in a many-to-one communication in a Vehicular Delay Tolerant Network (VDTN). Seven groups with three stationary sensor nodes sense the temperature, humidity and wind speed and send these data to a stationary destination node that collect them for statistical and data anal...
Article
The advances in next generation network and IoT have provided a promising opportunity to resolve the challenges caused by the increasing transportation issues. In this paper, we investigate the performance of different routing protocols in a Vehicular Delay Tolerant Network (VDTN) crossroad scenario. The mobility patterns of vehicles are generated...
Chapter
Wireless Mesh Networks (WMNs), also referred to as a form of wireless ad hoc network are in fact one particular type of Wireless Sensor Networks (WSNs), whose topology can vary from a simple star network to an advanced multi-hop wireless mesh network. The main topological feature in this case is that nodes are organized in a mesh topology, making W...
Article
A Mobile Ad Hoc Network (MANET) is a multi-hop wireless network in which the mobile nodes are dynamic in nature and which has a limited bandwidth and minimum battery power. Owing to this challenging environment the mobile nodes can be grouped into clusters to achieve better stability and scalability. Grouping the mobile nodes is called clustering,...
Article
Wireless Mesh Networks (WMNs) have become an important networking infrastructure due to their low cost for providing broadband connectivity. Issues for achieving the network connectivity and user coverage are related to the node placement problem. Several optimization problems are showing their usefulness to the efficient design of WMNs. These prob...
Article
Full-text available
A group of wireless devices with the ability to sense physical events (sensors) or/and to perform relatively complicated actions (actors), is referred to as Wireless Sensor and Actor Network (WSAN). In WSANs, sensors gather information about the physical events, while actors perform appropriate actions upon the environment, based on the sensed data...
Chapter
Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable novel and low cost applications. There are many fundamental problems that Wireless Sensor Networks (WSNs) research will have to ad...
Article
In Wireless Sensor and Actor Networks (WSANs), sensors and actors collaborate together to get the information about the physical environment and perform appropriate actions. In order to provide effective sensing and acting, a distributed local coordination mechanism is necessary among sensors and actors. WSANs have emerged as a variation of WSNs. W...
Article
In wireless sensor and actor networks, sensors and actors collaborate to get the information about the physical environment and perform appropriate actions. In order to provide effective sensing and acting, a distributed local coordination mechanism is necessary among sensors and actors. In this work, we implement and compare two Fuzzy-Based System...
Article
Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable novel and low cost applications. There are many fundamental problems that Wireless Sensor Networks (WSNs) research will have to ad...
Article
Data replication means storing copies of the same data at multiple peers thus improving availability and scalability. Replication can be seen as a family of techniques. Full documents or just chunks can be replicated. Since the same data can be found at multiple peers, availability is assured in case of peer failure. Consistency is a challenge in r...
Chapter
Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed systems but suffer from availability and reliability. In order to increase availability and reliability, data replication techniques are considered commonplace in P2P computing systems. Replication can be seen as a family of techniques. Full documents or just ch...
Chapter
Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed systems but suffer from availability and reliability. In order to increase availability and reliability, data replication techniques are considered commonplace in P2P computing systems. Replication can be seen as a family of techniques. Full documents or just ch...
Article
Full-text available
Wireless Mesh Networks (WMNs) distinguish for their low cost nature that makes them very attractive for providing wireless Internet connectivity. Such infrastructures can be used to deploy community networks, metropolitan area networks, municipal and corporative networks, and to support applications for urban areas, medical, transport and surveilla...
Article
Grid computing have emerged as scientific and technical work, where geographically distributed computers, are used to create virtual supercomputers of vast amount of computing capacity able to solve complex problems in less time than before. Thus, within the last years we have witnessed how grid computing has helped to achieve breakthroughs in mete...
Conference Paper
Full-text available
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay that decides the Peer Reliability (PR). In our system, we considered three input parameters: Number of Interactions (NI), Local Score (LS), Security (S). We evaluate the proposed system by computer simulations. The simul...
Conference Paper
Full-text available
The use of various types of media and communication technologies in e-learning activities enhances content visualization and user interaction, and increases learner engagement and effectiveness. The evolution of multimedia technologies in recent years has opened new opportunities of integrating multimedia resources to support on-line teaching and l...
Conference Paper
Full-text available
In previous research we proposed a new type of learning resource named Collaborative Complex Learning Resource (CC-LR) in support for teaching and learning by the virtualization of live collaborative sessions, with the aim to leverage the knowledge elicited during the collaboration and produce interactive and attractive resources to be played by en...
Conference Paper
Full-text available
In this paper, we propose and implement a medical support system considering P2P and IoT technologies. We used our implemented smart device that we call SmartBox. We have implemented in the Smart Box many functions and sensor such as body sensor, infrared sensor, chair or bed vibration control, light control, smell control and sound control. By usi...
Conference Paper
Full-text available
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communi-cations in JXTA-Overlay that decides the Peer Reliability (PR). In our system, we considered three input parameters: Local Score (LS), Number of Authentic Files (NAF) and Number of Interactions (NI). We evaluate the proposed system by computer...
Conference Paper
Full-text available
The main aim of this paper is to report on the building of a software framework that greatly simplifies the development of the presentation layer for Java EE applications with thin clients. One of the design principles of the presentation layer in Java EE applications is to separate the business layer flow control and calls from the presentation la...
Conference Paper
In this paper, we evaluate the performance of WMN-GA system for different settings of number of mesh clients. The population size is considered 64 and the number of