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.
We present LVRI, a hybrid link-state routing protocol based on exchange of link states in a region of interest. The region of interest (ROI) is defined as a connected component of the network that includes the source, destination nodes and the nodes that act as relays for the data. An ROI is established on-demand and exists as long as there are data to be sent. Each node in the region of interest...
In the past decade, multipath routing has been proposed to provide reliability for mobile ad hoc networks (MANETs). As wireless mesh networks become more and more popular, performance evaluation of different routing algorithms is required in static scenarios. Performance comparison between unipath routing and multipath routing is conducted in this paper. From the simulation results we find that multiple...
Disruptions, high dynamism and no end-to-end communication are some of the Vehicular Delay-Tolerant Networks (VDTNs) main characteristics. This paper describes the implementation of a new VDTN multicast routing protocol which makes use of knowledge about previous encounters to estimate congestion and density and better spread data bundles and limit the number of copies to reduce overhead. After a...
Tactical mobile ad hoc networks have a hierarchical organization with soldiers reporting to their group leader and from them to the command center. In such a network, it is important to prioritize the traffic associated with the leaders without starving other essential communication in the network. To support such a feature, we propose a hybrid routing protocol, named as “Rank-aware Tree-based Geographical...
In order to have the benefits offered by Proactive Routing and Reactive Routing while reducing the undesirable effects of both respectively, Hybrid Routing is suggested to be used in ad-hoc and Mobile Ad-hoc Networks (MANETs). One such hybrid routing protocol is the Zone Routing Protocol (ZRP). ZRP attempts to reduce the initial route discovery delay in case of reactive routing, and the control traffic...
We propose a connectivity-based routing protocol (named CRP) for underwater wireless sensor networks (UWSNs). CRP considers the reliability issue due to high error rate in UWSNs. Hence, during forwarding, a node with the highest connectivity to the sink is selected as a next forwarding node. Using the NS-2 simulator, CRP is compared against a localization-free routing protocol in UWSNs (i.e. H2-DAB)...
A Wireless Sensor Network (WSN) consists of large number of small, inexpensive nodes that depend on their sensors, transmission and routing capabilities to collect and disseminate critical data. The energy consumption is a key design criterion for WSN routing algorithms due to the limited availability of energy within network nodes. Hence, energy-efficient routing mechanism is one of the most critical...
Internet research community has proposed many different multicast routing protocols to support efficient multimedia application such as, IPTV, videoconferencing, group games. Nevertheless, the design of all these protocols does not take into account that group members may be mobile. Indeed, with the arrival of Mobile IPv6 by IETF providing mobile users with continuous access, group members in the...
Wireless Sensor Networks (WSNs) have been regarded as distinguished Ad Hoc networks that can be used for specific applications. Since a WSN consists of potentially hundreds of low cost, small size and battery powered sensor nodes, it has more potentials than other Ad Hoc networks to be deployed in many emerging applications. The WSNs raised many new challenges such as: the design of embedded sensors...
This article mainly describes the Ad hoc on-demand QoS routing based on Bandwidth Prediction (AQBP). Differing from the existing QoS routing protocols, AQBP takes node future bandwidth into consideration when selects route. The future bandwidth requirement of each node is predicted by its history. The performances of throughput, transmission ratio and delay among AODV, AQOR and AQBP have been simulated...
To resolve channel interference and "Deafness" problem in cognitive wireless mesh network, a new Cross-layer Design based on Link Quality for Cognitive Wireless Mesh Networks is proposed. When the node chooses the channel, it is not only in accordance with the rank of channels, but also based on link quality. In this way, cross-layer technology can be effectively achieved, and network performance...
The main objective of this paper is to design a opportunistic routing named ORONM (Opportunistic Routing Oriented to Network Metrics).In this paper, ORONM protocol for the message through to allocate resources to optimize certain routing indicators, such as forwarding success rate, the average transmission delays and cost than, etc. At last, we use QualNet to simulate the protocol, and compare with...
This paper investigates traffic related performance for TCP/UDP-based traffic flows in a MANET powered by OLSR with various routing metrics. Besides the ETX (expected transmission count), an alternative is proposed that resorts on a cross-layer approach to obtain PER (packet error rate) estimates from the physical layer. Throughput and latency performance are evaluated for various configurations of...
We propose a novel position-based routing protocol Anchor-based Connectivity Aware Routing (ACAR) for Vehicular Ad-hoc Networks (VANETs), which considers both buses and cars as vehicular nodes running in both clockwise and anti-clockwise directions. ACAR is a hybrid protocol, uses both the greedy forwarding approach and the carry-store-and-forward approach to ensure the connectivity of the routes...
Wireless links are often asymmetric due to the heterogeneity in transmission power of devices, the limitation of node energy, different antenna gain among nodes and non-uniform environmental noise. Nevertheless, most of the routing algorithms for ad hoc networks assume that all wireless links are bidirectional, such algorithms are not able to react to or exploit the full connectivity of the network...
Routing protocols design is an important and essential issue for Vehicular Ad Hoc Networks. In this paper, a more realistic simulation environment is developed based on VanetMobiSim and OPNET, and the performance of several classical routing protocols such as Optimized Link State Routing (OLSR), Geographic Routing Protocol (GRP), Ad hoc On Demand Distance Vector Routing (AODV) and Dynamic Source Routing...
Abstract-Network Coding Opportunistic Routing (NCOR) methods of wireless mesh networks have the advantage of high throughput and high reliability. However, they suffer problems of higher decoding latency and frequent packet collisions. Also, they have the deficiency in supporting multi-type services. Focusing on the QoS problems of multi-service supporting, we study the optimized NCOR routing methods...
The design of a routing protocol for Unmanned Aeronautical Ad-hoc Networks (UAANETs) is a great challenge, especially due to the high mobility of Unmanned Aerial Vehicles (UAVs). Among all routing protocols that have been designed for UAANETs, the Reactive-Greedy-Reactive (RGR) [1] protocol has been proposed as a promising routing protocol in high mobility and density-variable scenarios. However,...
Now the mainly research on the protocol of mobile vehicle network is based on connected networks. But this method has its limitations. The majority nodes in this network have the constraint that they have sufficient density and moderate mobility. In fact, the nodes in highway environment have very high speed and the network topology changes very quickly. This makes the link between nodes instability...
A MANET (Mobile Ad Hoc Network) can support large as well as small scale network topology. Based upon our specific small scale MANET requirement, we have taken the combination of horizontal and vertical topology with less number of nodes to check how the various MANET protocols like pro-active (DSDV) and re-active (AODV and DSR) performs in this manner. In this research study, we have observed these...
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.