The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Information and communication technology (ICT) plays an important role in worldwide electricity consumption. Existing routing approaches, oblivious to location-dependent energy prices, incur considerable cost to network operators. We propose a new routing approach in order to minimize electricity cost of core network under multiple electricity market environments. The proposed approach is based on...
Under the opportunistic network environments, normal network protocols can hardly transfer data successfully and efficiently. In order to overcome this problem, many new routing algorithms have been raised pertinently. Thereinto, the Epidemic routing algorithm is a typical approach, which maintains least delay with a highest delivery ratio. However, it is a defective method for routing data as it...
This paper focuses on data replication in structured peer-to-peer systems over highly dynamic networks. A Q-learning-based replication approach is proposed. Data availability is periodically computed using the Q-learning function. The reward/penalty property of this function attenuates the impact of the network dynamism on the replication overhead. Hence, the departure of a node does not necessarily...
For the realization of the safe driving support system in the Intelligent Transport System (ITS), many studies are conducted to apply the wireless ad hoc network to the inter-vehicle communication. In the wireless ad hoc network protocol used for the inter-vehicle communication, it is necessary to consider the stability of route because network topology changes dynamically according to movement of...
The Constrained Application Protocol (CoAP) is a promising candidate for future smart city applications that run on resource-constrained devices. However, additional security means are mandatory to cope with the high security requirements of smart city applications. We present a framework to evaluate lightweight intrusion detection techniques for CoAP applications. This framework combines an OMNeT++...
A bio-inspired model to care for casualties in a disaster is presented and a simulation based on this model is performed and evaluated. The model uses a queuing system inspired by the behavior of immune systems and an ACO-like heuristic for routing casualties across overloaded medical centers. The simulation results are promising. Our model can be modified to be used for the evacuation of population...
Network availability is an essential feature of an optical telecommunication network. Should a failure of a network component occur, be it a link or a component inside a node, network control plane must be able to detect the failure and reroute the traffic using spare components until a repair is done. Shared risk link groups (SRLGs) are used to describe a situation where seemingly unrelated logical...
In this paper, based on an in-depth analysis of Geographical Routing Protocol (GRP), especially its next hop selection, we present an improvement for the strategy of next hop selection with a joint consideration of distance factor and hierarchical quadrant. Based on the next hop selection strategy, an Improved Geographic Routing Protocol (IGRP) has also been proposed in this paper, which has a higher...
Designing educational resources allow students to modify their learning process. In particular, on-line and downloadable educational resources have been successfully used in engineering education the last years [1]. Usually, these resources are free and accessible from web. In addition, they are designed and developed by lecturers and used by their students. But, they are rarely developed by students...
In the context of multi-robot exploring, we work on the particular problem of maintaining communication links between an explorer robots and a base station using autonomous robot routers. In this paper, we propose and describe a kind of exploring application which considers a variable amount of robots over time. This problem opens various research challenges. Afterwards, we focus on the problem of...
Wireless Sensor Network (WSN) is consisting of independent and distributed sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. Routing protocols represent an essential aspect of the performance of mobile wireless networks. This paper presents a comparative analysis between several routing algorithms and their impact on the performance of WSN. The performance...
The routing policy Size Interval Task Assignment (SITA) isolates small arrivals from large arrivals, while choosing intervals to balance the workload of each server. It works well for highly variable arrivals, but the isolation can cause server idle-ness. To improve this, we suggest a scheme to add pooling to these SITA-like systems, which can result in better performance. We propose a routing policy,...
In this paper, we propose a new global dynamic routing strategy on scale-free networks with heterogeneous node capacity. The new routing strategy for network systems not only takes the information of the queue length of nodes into account, but also considers node's delivering capacity. Under the new routing strategy, the system can reach a very high network capacity, which is four times more than...
Vehicular ad hoc networks (VANET) mean wireless networks where communication terminals in VANETs do not necessarily require infrastructures to communicate with each other. To provide Intelligent Transportation System (ITS) services in VANETs, there are lots of issues about network performances for several application types. In particular, if applications need stable link-status, there are lots of...
In this paper, a dynamic shortest path weighted routing mechanism applying to mobile ad hoc networks is proposed based on the complex network theory. This weight routing mechanism uses node energy and link distance which are the two most important factors affecting the performance of mobile ad hoc networks to structure the weights of edges. The routing process presented by this paper uses a mixed...
As the demand for large-scale wireless multimedia sensor networks increases, so does the need for well-designed protocols that optimize the utilization of available networks resources. This requires experimental testing for realistic performance evaluation and design tuning. However, experimental testing of large-scale wireless networks using hardware testbeds is usually very hard to perform due to...
Vehicular Ad-hoc Network is gaining the attention of researchers because of the technological advancements for developing an Intelligent Transportation System (ITS). The dynamic nature of vehicles (nodes) leads to frequent path breaks and network fragmentation. Therefore, routing has become a critical issue in inter-vehicle communication. Location management in VANETs is considered as a critical issue...
Performance of a multicomputer largely depends on that of the underlying network communications such as multicast, which is essential for processors in multcomputer to exchange data and messages. Two major parameters used to evaluate multicast routing are the time it takes to deliver the message to all destinations and the traffic which refers to the total number of links involved. Direct network...
We evaluate a routing metric, called TXPFI, which captures the expected number of frame transmissions needed for successful delivery of data in Wireless Sensor Networks (WSNs) featuring non-fully cooperative nodes and unreliable links. The study, which addresses the exploitation of the TXPFI in routing protocols of distance-vector type, assesses the impact of different network settings on the performance...
Distributed Hash Tables (DHTs) provide information lookup within a Peer-to-Peer (P2P) network. A multitude of distributed applications leverages DHTs for offering more advanced services such as distributed file systems, web caches or distributed DNS. For such DHT-based applications, lookup performance is highly important. However, lookup performance is severely affected by network characteristics,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.