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Network topology plays a vital role in chip design, it largely determines network cost (power and area) and significantly impacts communication performance in many-core architectures. Conventional topologies such as a 2D mesh have drawbacks including high diameter as the network scales and poor load balancing for the center nodes. We propose a methodology to design random topologies for on-chip networks...
Cultural Algorithms are computational models of social evolution based upon principle of Cultural Evolution. A Cultural Algorithm consists of a Belief Space consisting of a network of active and passive knowledge sources and a Population Space of agents. The agents are connected via a social fabric over which information used in agent problem solving as passed. The knowledge sources in the Belief...
Energy scavenging from ambient sources represents a promising solution for sustaining continual operation for wireless sensor networks. An energy harvesting wireless sensor network (EH-WSN) can have two node types, harvesting enabled nodes (HNs) and non-harvesting enabled nodes (NHNs). In this paper, we consider the problem of achieving network longevity in EH-WSN when in-network data aggregation...
Content Centric Networking (CCN) is a new architecture for a future Internet. CCN relies on in-network caching capabilities of nodes and the efficiency of this architecture depends drastically on performances of caching strategies. Thus, there have been a lot of studies proposing new caching strategies to improve the performances of CCN. However, among all these strategies, it is still unclear which...
Clustering algorithms have been widely used in wireless sensor networks for virtual backbone construction. They organize the nodes into smaller groups and form a structured topology allowing more efficient bandwidth usage and battery consumption. As the clustering algorithms are usually used for routing, it is crucial to measure the efficiency of the generated backbone in information transport. Failure...
The basic performance of multilevel inverters is synthesizing a proper output voltage level by using several DC sources in the input. By increasing the number of levels in the output, the generated output voltage has smaller steps, which leads to better quality output waveform. The main problem of multilevel inverters is the high power switches necessity. This paper proposes a new non-isolated DC...
We consider the communication cost of computing functions when inputs are distributed among the vertices of an undirected graph. The communication is assumed to be point-to-point: a processor sends messages only to its neighbors. The processors in the graph act according to a pre-determined protocol, which can be randomized and may err with some small probability. The communication cost of the protocol...
Traffic engineering under OSPF routes along the shortest paths, which may cause network congestion. Software Defined Networking (SDN) is an emerging network architecture which exerts a separation between the control plane and the data plane. The SDN controller can centrally control the network state through modifying the flow tables maintained by routers. Network operators can flexibly split arbitrary...
Energy-aware lightpath routing and establishment in optical backbone networks can reduce energy consumption. A heuristic method suitable for network's Planning phase, based on Swarm Intelligence and Grooming practices is proposed that reduces the energy footprint by taking advantage of asymmetric bandwidth split across multiple streams routed to the same destination through different paths. The Ant...
Distributed Routing Model (DRM) and Centralized Routing Model (CRM) are two mainstream routing models for Network-on-Chip (NoC). DRM is scalable and efficient, but its state learning is costly because exchanging network state must be in flooding form which may consume large amount of bandwidth. CRM monitors and send real-time network state to a central routing node as the basis of routing path computing...
Network engineers and designers need additional tools to generate network traffic in order to test and evaluate, for instance, application performances or network provisioning. In such a context, traffic characteristics are the most important part of the work. Indeed, it is quite easy to generate traffic, but it is more difficult to produce traffic which can exhibit real characteristics such as the...
The size versus performance tradeoff is investigated for hybrid phased arrays consisting of multiple mode subarrays. First, the general topology and design parameters of such an array is described with respect to size and complexity. Finally, full wave electromagnetic simulation results are presented for 3 arrays each with 16 feed points. It is shown that the hybrid array with 4 sets of 4 mode subarrays...
A technique to synthesize distributed linear parameter-varying (LPV) controllers for the control of heterogeneous LPV systems interconnected through switching directed interaction topologies is presented. Groups of subsystems are defined with undirected interaction within, but directed interconnections between each other. This allows to construct a virtual symmetric interconnection matrix representation...
Ethernet Ring Protection (ERP) switching has emerged to provide sub-50ms of restoration times, allowing Ethernet technologies to expand beyond enterprises to Next Generation Metro and Backbone networks, providing much needed services to interconnect dispersed data centers. This paper considers the problem of efficiently designing and planning an Ethernet based metro network with ERP protection method...
In this paper, we present a new heuristic that generates broadcast schemes in arbitrary networks. The heuristic gives optimal broadcast time for HyperCube, and best results for Cube-Connected Cycles and large Shuffle-Exchange graphs. Extensive simulations show that our new heuristic outperforms the best known broadcast algorithms for two different network models representing Internet generated using...
This paper provides a brief review on characteristics of main topologies of voltage source multilevel inverters. The selected topologies included conventional two levels, flying capacitor, neutral point clamped, three levels and seven levels cascaded H-bridge inverters. Several performances of topologies including quality of waveforms of output voltage, cost, complexity and reliability are selected...
This paper proposed a 43-level 3-phase 33 kV modular multilevel cascaded (MMC) converter for direct grid integration of renewable generation systems. A high-frequency magnetic-link is considered to generate isolated and balanced multiple dc sources for all of the H-bridge inverters of the MMC converter. The proposed converter is designed and analyzed taking into account the specified system performance,...
Current data centers often employ SDNs (Software-Defined Networks) that are layered in most cases. However, information overwhelming has been a limitation to SDN deployment. We present a management model for data center networks. In this approach, regional networks on lower layers will be aggregated and viewed as single switches to upper layers. Management information will be divided into three parts,...
Network coding-based link failure recovery techniques provide near-hitless recovery and offer high capacity efficiency. In this paper, we propose a simple column generation-based design algorithm and a novel advanced diversity (network) coding technique to achieve near-hitless recovery in large networks. The main problem is solved with Linear Programming (LP) and Integer Linear Programming (ILP),...
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