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.
Because of the feature of hybrid wireless mesh network, hybrid routing protocol is the most proper routing protocol for this kind of network. Hybrid routing protocol is composed of proactive routing protocol and reactive routing protocol. The proactive one is adaptive for static mesh routers, and the reactive one is suitable for mobile mesh clients. Existing hybrid routing protocols all neglect the...
In a Delay Tolerant Network (DTN), where nodes are constantly moving and the connection of nodes are intermittent, messages are delivered by replicating to neighbor nodes in hopes of delivering to the destination in a timely manner. This causes a DTN network to have many duplicates even long after the message has reached its destination. In this paper, we develop a new routing protocol that helps...
Mobile ad-hoc sensor networks (MASNETs) have promised a wide variety of applications such as military sensor networks to detect and gain as much as possible about enemy movements and explosions. Most of these applications can be deployed either in static or mobile environment. In static WSNs, the change of sensor nodes topology is normally caused by node failure which is due to energy depletion. However,...
In this paper, we first present a heterogeneous theoretical framework for DTNs where the contact between nodes is based on independent differently distributed assumption. Moreover, the message forwarding process follows a Gamma Distribution. Then, we propose a new spray routing scheme based on this framework. Moreover, we compare our routing protocol with traditional spray routing (TSR) protocols...
Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers. Node placement problems have been investigated for a long time in the optimization field due to numerous applications in location science. In our previous work, we evaluated WMN-GA system which is based on Genetic Algorithms (GAs) to find an optimal location assignment for mesh routers. In this paper,...
Existing literatures [1] [2] [3] [4] show that deploying fixed relay infrastructure with stable interconnections can help to improve network connectivity. However, fixed relay infrastructure is inflexible and could be costly to deploy over large area. In this paper, we study the effectiveness of mobile relays in improving network connectivity in both Random Waypoint and Manhattan mobility models....
Large crowds at music festivals or other mass events create challenging environments for traditional infrastructure based wireless networks. Mobile devices carried by the attendees produce large amounts of network traffic that can result in network outage or serious delays. Opportunistic networks may offer solutions to enable communication between attendees and/or organizers through direct communication...
This paper analyses the performance of a new routing protocol for vehicular delay-tolerant networks, called GeoSpray. This geographic routing protocol performs a store-carry-and-forward, combining replication and forwarding/ routing decisions based on location information, with explicit delivery acknowledgments to improve network resources utilization. The performance of the proposed routing protocol...
Topology change is the main factor that affects the network life time of Wireless Sensor Network (WSN) applications. In static WSN, the topology change is often caused by node failure which is due to energy depletion. However, in the Mobile WSN (MWSN), the main reason of the topology change is caused by the node movement. Since the mobile sensor nodes are limited in power supply and have a low radio...
Sink mobility has attracted much research interests in Wireless Sensor Networks (WSNs), because it could provide energy saving and reduce latency during data collection. However, the mobile sink node is still a single point of failure in many WSNs applications, thus needs to be particularly protected against adversaries. We propose in this paper a moving strategy for the mobile sink which prevents...
The evolution of mobile technologies had a major impact over the mobile services. The requests for multimedia services on portable devices are increasing continuously and they are becoming one of the main engines for the telecommunications industry. The heterogeneous wireless access technologies available on the mobile devices are an opportunity for the Mobile Network Operators to improve the quality...
Jamming attack by adversaries is the critical threat in Network Centric Warfare that uses tactical wireless networks. Thus research on developing new networking protocols that are resilient to such attacks are of high importance. Geocasting is a prominent routing mechanism in tactical networks to send critical messages such as alarm about chemical attack, guerrilla detection etc, to the nodes within...
Mobile ad hoc networks are characterized by their highly dynamic, multi-hop, and infrastructure-less nature. Due to limited computing power, scarce bandwidth, high mobility and the lack of a central coordinating entity, service discovery in these network is a challenging task. The great majority of service discovery protocols developed for MANETs deal with the above issues at the application layer...
Wireless technology based on the IEEE 802.11 standard is used to support multiple types of communication services (data, voice, and image) with different QoS requirements. Node mobility creates a continuously changing communication topology in which paths break and new one form dynamically. The routing table of each router in an adhoc network must be kept up-to-date. MANET uses Distance Vector or...
This paper analyses the two common routing protocols, AODV and DSR in Ad-Hoc network. On the OPNET network simulation platform, a systematically simulation and research has been carried out on the performance of two routing protocols, and how the network environments impact on the performance of routing protocol. The packet delivery ratio and average delay of these two indicators have been selected...
Underwater sensor networks were recently proposed to support quite a few aquatic applications such as ocean exploration and harbor monitoring. Different from terrestrial WSNs, the underwater sensor networks have many unique characteristics, such as greater propagation delay, higher dynamic topology and sparse node density. These features bring many new challenges to the protocol design of underwater...
In dynamic wireless networks, effective modeling on link behavior would lead the network protocol design towards a predictive and reasonable way. Emerging mobile ad hoc network (MANET), however, is of self-organizing and infrastructureless paradigm, where topology dynamics are highly related to many complicated parameters, such as node density, mobility model, and transmission range etc, which make...
Mobile ad hoc network and peer-to-peer networks are most advancing and emerging research areas in the recent years. Both of these networks are based on the same phenomenon like self-configuration and self-organization. Although, peer-to-peer network was firstly designed for wired network but now a days it may be deployed over mobile ad hoc network. When P2P networks are deployed over ad hoc network,...
In this paper, the requirements of survivability of MultiHop Wireless Network (MWNeT) was analyzed firstly, then we classify the impacts that affect survivability into three categories: dynamic topology, faults and attacks, and the impacts of these factors are analyzed individually. A simulation environment for the MWNeT towards survivability is designed and implemented as well. Experiments that under...
Mobile ad hoc networks (MANETs) have been gaining tremendous attention owing to the advances in wireless technologies accompanied by many applications and implementations. However, there are still a number of issues in MANETs which require further investigations and efficient solutions. Out of these issues, broadcasting in MANETs has been a major problem for both industry and the research community...
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.