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This paper investigates the consensus problem of multi-agent networks with aperiodic sampled communication and nonuniform time-delays under switching topology. A distributed impulsive algorithm is introduced to achieve consensus, where only position measurements are utilized. It is shown that under certain assumptions upon the sampling intervals, the diagonal elements of Laplace matrix and the control...
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...
Design and planning Military networks requires complex cost-performance trades involving several functions ranging from subnet creation, topology generation, routing hierarchy design & protocol choice, waveform and frequency planning and MAC choices. In this paper we focus on a subset of the design problems pertaining to routing architecture design with unit task organization (UTO) requirements...
In the view of the large scale and increasing kinds of service of space information networks, a service- oriented topology control algorithm is proposed. According to demands of existing service, the topology of network is divided into several logical sub-topologies, on which construct the corresponding topology. Taking the communication pattern as an example, the augmentation-based approach is adopted...
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...
We present experimental results for performance of the 2D hypermesh NoC topology, realized with the Altera Family of FPGAs. Hypermeshes are based on the concept of hypergraphs, which consist of a set of nodes and a set of hyper-edges, where the hyper-edges represent low-latency distributed switches. In a 2D hypermesh, the nodes in each row or column are members of a hyperedge, where packets can traverse...
The message deliveries based on the store-carry-forward routing schemes, such as Epidemic Routing(ER), are one of useful methods for communication under challenged environments. However, these methods commonly have their own limitations in reach ability of messages to destinations and scalability. For example, as the distance to the destination increases, the delivery delay of a message between source...
Networks-on-Chip (NoC) with low-radix switches forming a simple and planar topology is typically accepted as the right interconnection infrastructure for current Chip Multi Processor and high-end Multi Processor System-on-Chip. This is mainly due to its simplicity in the physical mapping on the chip. However, as the network diameter increases, latency and power consumption are increased due to the...
Experimentation is typically the last step before launching a network application in the wild. However, it is often difficult to gather enough hardware resources for experimenting with a reasonably sized overlay application inside a controlled environment. Virtualization is thus a handy technique for creating such an experimentation testbed. We propose a tool called NEmu designed to create virtual...
Wireless sensor networks, WSNs, are an efficient way to deal with low-rate communications in confined environments such as mines or nuclear power plants because of their simplicity of deployment and low cost. In these application domains, WSNs are used to gather data from sensor nodes towards a sink in a multi-hop convergecast structure. In this paper, we focus on a traffic-aware time slot assignment...
This paper first introduces existing congestion control algorithms and analyses their weakness. And after discusses the features and requirements of network topology simulation system, a congestion control scheme based on improved RED algorithm named DFCC was presented. DFCC reduces the package loss by adjusting link delay dynamically when congestion happens. And by means of twice optimization of...
As the number of processing elements which can be placed on a single chip doubles about every two years, both System-on-Chip (SoC) and the microprocessor market call for high-performance, flexible, scalable, and design-friendly interconnection network architectures [1]. Network-on-Chip (NoC) has been proposed as a solution to multi-core communication problems. The advantages of NoC include high bandwidth,...
Limited resources in Wireless Sensor Networks (WSNs) are the key concern that needs to be given a careful consideration when studying virtually any aspect of a sensor network. Therefore, energy demands and radio bandwidth utilization should be addressed, especially in one-to-many communication. To define the problem, this article presents and categorizes the most common WSN multicast procedures depending...
In communication networks data packets are often transmitted via multiple hops on certain destined source-destination paths. The topological structure of such a scenario can be modeled by multi-node tandem queueing networks, but the standard independence assumption of queueing theory does not hold, that is, modeling the packet processing times at the successive nodes as independent and identically...
On real-time video streaming, the distribution with multi-tree Application Level Multicast (ALM) is effective in terms of delay and jitter. In constructing multi-tree networks, a joining node selects counterpart nodes based on their performance or bandwidth capacity and they are connected each other. However, tree-based ALM has the overhead of reconstructing the tree topology when any node leaves...
Due to the heterogeneous, opaqueness and dynamic nature of Cloud Computing, existing MapReduce approach is not suitable for perform Parallel Computing on the cloud. In this paper, we propose a modified MapReduce framework which extracts the physical network topology information from the Virtual Machine Monitor (VMM) feature of VMs, in order to exploit dynamic resource allocations, and hence enable...
Achieving accurate, cost-efficient, and fast anomaly localization is a highly desired feature in computer networks. Prior works, examining the problem of single link-level anomaly localization, have claimed that a necessary condition for localizing anomalies unambiguously is to deploy resources that enable the monitoring of a set of paths distinguishing between all links of the network pairwise. In...
As SoC applications demand high performance and integration density, SoC designers consider multiple aspects during the design phase. This paper presents a Network-on-Chip (NoC) design methodology for generating high quality interconnects for multi-core System-on-Chip architectures. The design process incorporates the main objectives of low power and high performance during topology synthesis. A rendezvous...
In this paper, we investigated the problem of finding an efficient topology for delay-constrained data in WSNs. As we know topology control is one of the important mechanisms designed for decreasing energy consumption in WSNs. Since topology control may increase the end-to-end delay, one of the criteria's should be considered in topology control algorithms is delay constraint. Most existing works...
This work investigates the performance of Optical Burst Switched (OBS) mesh networks using Wavelength Division Multiplexing (WDM) and Localized Functional Resources (LFC). These OBS networks were designed to have the same amount of wavelengths in all the links of a mesh topology, but some nodes or links chosen from the knowledge of network utilization, have additional functional resources as Wavelength...
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