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With the growing and improving network services, diverse interests of users have been satisfied, and the same resources have been visited repeatedly becomes a common phenomenon. Thus, in the process of data transmission, the duplicate transfer in the large-scale network topology will inevitably lead to a huge waste of resources, which commonly exists in the campus network similar topology environment...
Interconnection network plays an important role in massively parallel systems. As a high performance switched network standard, Infiniband is widely used in MPP systems. Compared to fat-tree topology which is commonly used in Infiniband networks, mesh/torus topology can achieve better performance and scalability. This paper proposes an Infiniband-based multi-path mesh/torus interconnection network...
Dynamic and partial reconfiguration allows to place on line the various tasks that describe an application, in available regions of an FPGA. This new feature leads notably to communication problems since tasks are not present in the matrix during all computation time. In this article, we compare popular interconnection architectures. From this study, the DRAFT network is designed to support the communication...
For high frequency design of SoC systems, cascaded crossbar switches become more and more popular. In this paper, we present a method based on FFT-butterfly architecture. This method can provide optimal topology of cascaded crossbar switches, which consists of multiple small crossbar switches. We apply it to AMBA3 AXI-based bus system design. Experimental results show that the proposed methods allow...
Replication is used in distributed and pervasive computing systems to enhance availability by placing needed data close to the users so that user perceived response time is minimized. In multi-tier data grid environment, replicas are usually placed in either top-down or bottom-up way. We believe that availability of data can be greatly enhanced by using both methods in a coherent way. Our proposed...
The biggest contemporary drawback in the maintenance and distribution of the global state is the increase in communication overheads. Therefore, localized routing is the method to avoid this problem. The network in this technique is inferred by the source nodes using statistics which are collected locally. The main aim of this paper is to present new localized algorithms to avoid some problems associated...
Telecommunication networks spanning large areas are subject to various failures. A survivable network provisioning scheme addressing multiple levels of network failures, especially disaster failures which may take out many network components, is desirable in the future Internet. In this study, we propose and investigate the characteristics of a multistate multipath provisioning scheme for telecom...
We describe the key design concepts of domain area planning utility (DAPU) developed by the PILSNER program to perform high-speed automated planning of future battlefield networks (FBNs). DAPU processes multiple inputs from resource planning such as nodes and their trajectories, planned ground- and air-tier nets, unit task organization (UTO) relationships, and typical communication requirements. It...
Distributed system emulators provide a paramount platform for testing of network protocols and distributed applications in clusters and networks of workstations. However, to allow testers to benefit from these systems, it is necessary an efficient and automatic mapping of hundreds, or even thousands, of virtual nodes to physical hosts-and the mapping of the virtual links between guests to physical...
Data-driven control is a methodology that attempts to find a suitable controller, based only on data taken from the system. Within this method, the virtual reference feedback tuning (VRFT), is a one-shot data-driven approach that transforms the control problem into an identification problem using restricted complexity controllers. However, how to choose the number of parameters, or the relation between...
Locality promotion in P2P content distribution networks is currently a major research topic. One of the goals of all discussed approaches is to reduce the interdomain traffic that causes high costs for ISPs. However, the focus of the work in this field is generally on the type of locality information that is provided to the overlay and on the entities that exchange this information. An aspect that...
It is crucial for P2P applications to control their traffics for saving the Internet bandwidth. During the P2P communication, if peers tend to share the data with near peers, the Internet traffic can be reduced. Thus the topology of the P2P networks will be clustering. In this article, we study downloading strategies for the living P2P applications with clustering topology. First, we combine two popular...
Determining the size of a network and its diameter are important functions in distributed systems, as there are a number of algorithms which rely on such parameters, or at least on estimates of those values. The Extrema Propagation technique allows the estimation of the size of a network in a fast, distributed and fault tolerant manner. The technique was previously studied in a simulation setting...
The active queue management in Internet routers exploits the idea that an incoming packet can be dropped by the router even if there is some available buffering space in the router. Therefore, the router can send congestion signals to TCP before the actual congestion occurs, preventing queues and delays from growing too high. Many active queue management algorithms has been proposed till now. Unfortunately,...
Growing expertise with clusters of commodity PCs have enabled a number of companies to harness petaflops of computation power and petabytes of storage in a cost-efficient manner. Clusters consisting of tens of thousands of PCs are not unheard of in the largest companies and thousand-node clusters are increasingly common in universities, research labs, and companies. Important applications classes...
In this work, we consider the performance benefits of distribution reservation control schemes in partially-connected wavelength-routed all-optical WDM networks. In particular, we propose a new distributed reservation control scheme designed to work for general topology wavelength-routed WDM networks. In this new scheme, capacity reservation is invoked by always using the first shortest path if the...
When dynamic service interconnection requests are managed by a centralized system (e.g., a network management system - NMS), the time required for the connections to be fully operational might be heavily impacted by the policy utilized to serve them. The policies must be devised for mitigating issues that increase this time, such as commercial router irresponsiveness to configuration commands during...
NEWSKY is a project aiming at the integration of various communication links into an all-IP based network. This network shall be based on IPv6 and commercial of the shelf products (COTS). Technical work packages have defined solutions for quality of service, mobility, inter- and intra- network handover, and security. In order to validate the derived concepts a realistic topology has been built which...
Heterogeneous distributed computing is found in a variety of fields including scientific computing, Internet and mobile devices. Computational grids focusing primarily on computationally-intensive operations have emerged as a new infrastructure for high performance computing. Specific algorithms such as scheduling, load balancing and data redistribution have been devised to overcome the limitations...
We investigate and quantify the benefits of multipath routing in a wide-area distributed environment which includes inter-domain routing issues. In this context, we discuss two possible multipath routing schemes and focus on the viable solution for distributed data-intensive applications with high bandwidth and delay requirements. The network topology aggregation is extended for end-to-end multipath...
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