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The information revolution has radically changed the way we make decisions and has expanded into mobile devices capable of informing choices at the point at which they are made. However, it is arguable whether the explosion of available information helps or hinders decision making, including in important domains such as healthcare and sustainability. Improving on that is the domain of choice architecture,...
In this paper, we evaluate the performance of WMN-GA system for different settings of number of mesh clients. We consider Weibull and Exponential distribution of mesh clients, which represent hotspot scenarios. The population size is considered 64 and the number of generation 400. For evaluation, we consider average size of giant component(Avg. SGC) and average number of covered mesh clients(Avg....
In this paper, we investigate the performance of OLSR and AODV protocols in a VANET crossroad scenario. The mobility patterns of vehicles are generated by means of CAVENET (Cellular Automaton based Vehicular Network) and as communication protocol simulator, is used NS3(Network Simulator 3). For the simulations, we used IEEE802.11p standard, TwoRayGroundPropagationLossModel and sent multiple CBR flows...
In recent years, Mobile Ad-hoc Networks (MANETs) have an increased attention on covering rural areas due to the possibility of usage of low-cost and high performance mobile terminals, without having to depend on the network infrastructure. Because the terminals are mobile, the routes change dynamically, so routing algorithms are very important for operation of MANETs. In this paper, we investigate...
As Mobile Ad hoc Networks (MANETs) are attracting attention for their potential use in several fields such as collaborative computing and multimedia communications, there is an increasing need to minimize the overhead introduced by routing protocols in the network. In this paper, we analyze the performance of a MANET by simulations, in terms of RREQ, RREP and RERR, considering Random Waypoint Mobility...
Wireless Mesh Networks (WMNs) are currently attracting a lot of attention due to their ability to provide cost-efficient broadband wireless connectivity. In our previous work, we evaluated WMN-GA system that is based on Genetic Algorithms (GAs) to find an optimal location assignment for mesh routers. In this paper, we evaluate the performance of two different network topologies by simulations considering...
Wireless Mesh Networks (WMNs) can provide wide range Wireless Local Area Networks (WLANs) area by connecting Access Points (APs) of WLANs each other using radio communications. A routing protocol is very important to keep communication quality over radio multi-hop communications because radio waves are impacted much by surrounding environment. When we use multi user shared applications such as a video...
In this paper, we present the implementation and analysis of our Mobile Ad hoc Network (MANET) testbed considering the Optimized Link State Routing (OLSR) and Better Approach To Mobile Adhoc Networking (B.A.T.M.A.N.) protocols. We consider two kinds of stairs experimental models. One when all the nodes are in stationary state and another one when one node is moving. The mobile node moves toward the...
We developed an adaptive architecture for ad hoc communications to be used in emergency conditions. Emergencies could be caused by natural or man made disasters. Such events are difficult to predict. Therefore, their situations are accompanied by uncertainty. The experiences of various emergency situations and the related research strongly indicate that reliable and robust communications could facilitate...
Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network's communication energy dissipation. However, selecting of the cluster head is not easy in different environments which may have different characteristics. In our previous work, in order to deal with this problem, we proposed a power reduction algorithm for sensor...
Mobile ad-hoc networks (MANETs) are autonomous distributed networks, where mobile nodes communicate with each other using wireless links. Since the communication is done by wireless links, it is difficult to grasp how the packets flow between communication nodes. It becomes even more difficult when the number of nodes is increased. In our previous work, we proposed a visualization system for MANET...
At present, the maturity of the peer-to-peer (P2P) research field has pushed through new problems such as those related with security. For that reason, it is important to provide security mechanisms to P2P systems since security is one of the key issues when evaluating them. The JXTA-Overlay project is an effort to use JXTA technology to cater to a generic set of functionalities that can be used by...
Mobile learning is considered the next step of online learning by incorporating mobility as a key requirement. Indeed, the current wide spread of mobile devices and wireless technologies brings an enormous potential to e-learning, in terms of ubiquity, pervasiveness, personalization, flexibility, and so on. For this reason, Mobile Learning is attracting significant research efforts covering a fairly...
Due to the improvement of connections capabilities of end-devices there is an increasing interest to design and implement full featured P2P networks that integrate end-devices. In this paper, we use JXTA-Overlay for the secure control of the robot. We considered the robot as end-device. We investigate the time of secure robot control when in the network were connected different number of peers and...
In recent years, there are many research works on ad hoc networks. In the future, we will see many ad hoc network applications, which are very important for realizing ubiquitous environments. The topology of ad hoc networks may change. For this reason, the routing protocols play an important role for construction of ad hoc networks. In this paper, we propose a new zone based routing protocol, which...
In recent years, Mobile Ad hoc Networks (MANETs) are continuing to attract the attention for their potential use in several fields. Mobility and the absence of any fixed infrastructure make MANETs very attractive for mobility and rescue operations and time-critical applications. In this paper, we present the implementation and analysis of our implemented MANET testbed considering the Optimized Link...
The design of an efficient collaborative multi-robot framework that ensures the autonomy and the individual requirements of the involved robots is a very challenging task. This requires designing an efficient platform for inter-robot communication. P2P is a good approach to achieve this goal. P2P aims at making the communication ubiquitous thereby crossing the communication boundary and has many attractive...
In this work, we investigate how WSN performs in the case when sink node moves using different radio models and metrics. We consider routing efficiency, delay and number of received packet metrics to evaluate the performance of WSN using AODV routing protocol, lattice topology, and TwoRayGround and Shadowing radio models. We evaluate the performance of WSN by simulations. The performance evaluation...
Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing cost-efficient broadband wireless connectivity. WMNs are showing their applicability in deployment of medical, transport and surveillance applications in urban areas, metropolitan, neighbouring communities and municipal area networks. At the heart of WMNs are the issues of achieving network connectivity...
In order to have an effective utilization of the radio wave resources, it is important to estimate propagation path in the urban area. In our previous work, we have examined the diffracted fields by two edges with an arbitrary angle which are in different and same heights. In this paper, the characteristics of the diffracted fields by two horizontal edges of a building rooftop are discussed. The numerical...
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