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Congestion presents a significant challenge in ad hoc networks due to their unstructured and distributed nature. In most congestion detection schemes for such networks, the affected node itself detects whether it is congested or not. The detection approach proposed in this paper performs detection with information estimators from neighbouring uncongested nodes that may be able to relieve the congestion...
A flying ad hoc network (FANET) that consists of multiple unmanned aerial vehicles (UAVs) is a promising technology for future networked systems. In this paper, we study a way to construct a topology for the FANET that guarantees end-to-end communication between the ground control station (GCS) and each mission UAV that performs its given task via optimizing the locations of the relay UAVs. To this...
We investigate the problem of computing Completely Independent Spanning Trees (CIST) under a practical approach. We aim to show that despite CISTs are very challenging to exhibit in some networks, they present a real interest in ad-hoc networks and can be computed to enhance the network robustness. We propose an original ILP formulation for CISTs and we show through simulation results on representative...
This work presents distributed beamforming using three dimensional randomly distributed volumetric arrays. This work examines a statistical ensemble (mean-valued) of average beampattern behavior for canonical and non-canonical volumetrically bound distributed (random) antenna arrays. Cubical, cylindrical, and spherical topologies of isotropic elements are analyzed to show beamforming and scanning...
Internet connection is essential for daily life, however not all areas are covered by Internet access due to historical reasons. For example, with 3.7 million daily passengers, London underground system has no WiFi or cellular signal provided during travelling due to legacy reasons. Deploy new access infrastructure need to consider the integrating problem with the current environment, also bring a...
A mobile ad-hoc network is infrastructureless dynamic network that consists of collection of wireless mobile nodes which communicates with each other without the use of centralized network. The research on existing literature of such network show evidence of plenty of algorithms and models that can estimate hop count based on connectivity without considering mobility of the network. Therefore in this...
This work proposes an approach based on Steiner trees to efficiently support multipoint communications in a multi-domain context, where each domain exposes a synthetic and aggregated view of its network. The approach that we propose is based on two pillars: The adoption of a topology aggregation of each domain's network as a Steiner tree and the use of a shortest path heuristic for the calculation...
This paper describes a trusted lightweight synchronisation protocol for wireless ad-hoc networks. The wireless ad-hoc network and wireless sensor networks is a large field of research. Their dynamic topologies make them difficult to synchronise (power consumption, slow convergence, accuracy). Moreover, these open networks are vulnerable to faulty nodes and attacks from malicious nodes. In this paper...
Broadcast is a fundamental operation in Mobile Ad-Hoc Networks (MANETs). A large variety of broadcast algorithms have been proposed. They differ in the way message forwarding between nodes is controlled, and in the level of information about the topology that this control requires. Deployment scenarios for MANETs vary widely, in particular in terms of nodes density and mobility. The choice of an algorithm...
Metropolitan areas witness significant fluctuations in mobile traffic due to patterns of human mobility. This fluctuation drastically deteriorates the efficiency and financial viability of conventional maximum-based network design. If networks are deployed to deal with the peak traffic rate at each site, their capacities are underutilized for most of time. To improve the efficiency of deploying base...
For the problem of communication support for the aircraft formation mission, the network connectivity is ensured by the way of adding relay nodes. A relay route planning method of airborne ad hoc network is presented. By the spanning tree selection strategy based on connected component and the relay vector connection strategy based on subsequent vector in-degree, the method gets the smallest number...
Wireless sensor networks (WSNs) serving in hostile environments are susceptible to multiple collocated failures due to explosives and natural calamities such as avalanches, landslides, etc., which can partition the network into disjoint segments. In such a scenario, federating the segments becomes essential for reestablishing communication among segments and resuming the WSN operation. Placing relays...
In this paper, we propose a distributed solution based on game-theoretic approaches to the topology formation problem for mobile wireless sensor networks with multi-source multicast flows. Our solution significantly reduces computational complexity by taking advantage of network coding. Finding an optimal topology for network coding in multi-source multicast flows is NP-hard problem, so the proposed...
In consequence of advances in wireless communication, digital systems and micro-electronic-mechanical system technologies wireless sensor networks (WSNs) have been developed and applied in lots of different real-world applications such as military, industrial, environmental, health, etc. Due to their limited resources and constraints, WSNs face with several problems such as energy consumption, node...
The mobile ad-hoc networks (MANETs) represent a broad area of study and market interest. They provide a wide set of applications in multiple domains. In that context, the functional and non-functional monitoring of these networks is crucial. For that purpose, monitoring techniques have been deeply studied in wired networks using gossip-based or hierarchical-based approaches. However, when applied...
The increasing trend in wireless Internet access has been boosted by IEEE 802.11. However, the application scenarios are still limited by its short radio range. Stub Wireless Multi-hop Networks (WMNs) are a robust, flexible, and cost-effective solution to the problem. Yet, typically, they are formed by single radio mesh nodes and suffer from hidden node, unfairness, and scalability problems. We propose...
Mobile ad hoc networks (MANETs) are continuously self-organizing, infrastructure-less consisting of collection of mobile nodes that communicate with each other without the use of centralized authority. MANETs are perfect for positions where a fixed structure is infeasible. Today's MANETs, suffer from network partitioning. This restriction makes MANETs in appropriate for applications such as crisis...
Mobile Ad hoc Networks (MANETs) are self-configuring, de-centralized and a kind of multi hop wireless packet networks, where the mobile gadgets (also referred to as nodes) communicate with each other on wireless links. Such networks find applications where a quick deployment or dynamic reconfiguration of network is required, or there is no pre-existing network infrastructure or wired network is available...
With the ubiquitous usage of mobile devices, most communications are now impacted by the users' mobility. Therefore, applications and services must be designed to cope with network dynamics produced by those mobility patterns. Software research and development would benefit from taking device mobility into account. However, implementing and testing software on real devices is costly and cumbersome...
In this paper, we propose topology based adaptive hybrid multicast routing (THMR) mechanism in mobile ad hoc networks. With the help of technique derived from Computational Intelligence (CI) discipline, Topology Change Rate (TCR) is predicted based on link behavior and node mobility for both proactive and reactive routing region in MANETs. We design a Reinforcement Learning (LR) based Q-Learning (QL)...
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