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We present an energy-efficient on-chip reconfigurable computing architecture, the so-called OLUT, which is an optical core implementation of a lookup table. It offers significant improvement with respect to optical directed logic architectures, through allowing the use of wavelength division multiplexing (WDM) for computation parallelism. We performed a design space exploration that elucidates the...
Irregular applications pose considerable challenges to modern computer systems, especially in distributed environments, where traditional high-performance networks are optimized for large message transfers. In this work, we analyze performance of an irregular application proxy benchmark running over traditional MPI/Infiniband as well as over the Data Vortex network, an emerging network architecture...
Heterogeneous data traffic is increasingly becoming a complex mix of both delay tolerant and intolerant IP traffic. Optical Burst Switched (OBS) networks have since become a backbone network solution to handle the resultant zetabyte volumes of such traffic concurrently using the burst assembly and transmission approach. The strict minimum burst size constraint requirements as well as varying maximum...
In this paper, we address the problem of routing, space and spectrum assignment (RSSA) in survivable flex-grid networks that implement spatial division multiplexing (SDM). In our consideration, we focus on two switching policies for the SDM (namely, independent and joint) while the network survivability is provided by dedicated path protection (DPP). We formulate the problem (RSSA-DPP) as an integer...
Elastic optical network paradigm supports the fast growth of Internet traffic due to its highly flexible spectrum assignment and bandwidth-variable optical paths. Orthogonal frequency division multiplexing (OFDM) based elastic optical networks supports sub-wavelength and super-wavelength services directly in optical level and also accommodate different data-rate traffic. It supports high speed data...
Software Defined Satellite Networking (SDSN) provides an innovative perspective to manage satellite network through logically centralized network view and standard interfaces between the control and data plane. Significant advantages of SDSN include enabling integration of space and terrestrial network, flexible and efficient resource management, rapid and economical network function updating, etc...
Valiant routing, the use of a random intermediate node to distribute network traffic, has been proposed for a number of recent HPC network topologies. It is also commonly used as a bulding block for adaptive routing algorithms, which use shortest path routes when possible, but revert to Valiant routing when necessary to avoid hot spots. We show that the version of Valiant routing proposed for the...
We demonstrate a four-port optical switch for the photonic network-on-chip architecture, which contains four silicon Mach-Zehnder optical switch elements tuned by the plasma dispersion effect. The optical signal-to-noise ratio of the device is over 10.0 dB in the wavelength range from 1525 nm to 1565 nm. Its 10%–90% rise time and fall time are 2 ns.
Connection based networking is a basic technology for data transmission in Transparent Optical Networks (TON). In this kind of networks, important elements of the network design and management are related to the routing decisions in the optical level. To diminish the use of resources, multicasting is required for a lot of applications. Usually, multicast routes are light-trees in TONs. These trees...
This paper evaluates the performances of elastic optical networks (EONs) in terms of request blocking probability with and without incorporation of spectrum conversions at intermediate switches. In EONs, dynamically setting up and tearing down of lightpath connections generate spectrum fragmentation problems. The spectrum fragmentation problem occurs when the available spectrum slots are isolated...
The utilization of time-synchronized operations (TSO) is gaining interest in the research community on Software-Defined Networking (SDN). This paper discusses TSO applicability in electronic packet and optical networks. In electronic packet networks, the TSO approach has been shown to improve network performance, thanks to timed network updates. In optical networks, this approach enables novel security...
The network with massive storage at the switching nodes can store and forward bulk data from delay-insensitive applications. Increasing storage capacity can, under some circumstances, improve network throughput, like bandwidth does. In this paper, the effects of storage and bandwidth on OCS network performance and the principles of trading storage for bandwidth are discussed. Our research indicates...
Space division multiplexing (SDM) is a promising solution with the scaling potential to overcome the possible capacity crunch problem in optical backbone networks. The key idea behind SDM is to exploit the spatial dimension to provide a significant increase in the transmission system capacity. In SDM, optical signals are transmitted in parallel through spatial resources (fibers, cores or modes), thus...
Accommodating sustained exponential traffic growth in optical networks requires scaling the spatial dimension using space-division multiplexing. Numerous uncoupled spatial channels may be realized by activating multiple parallel fibers or cores in multicore fibers. A multiplicity of uncoupled spatial channels will render the granularity provided by multiple wavelength channels less essential in enabling...
To take advantage of software defined networking (SDN) within a limited budget constraint, a natural strategy is to incrementally deploy a few SDN switches (and a limited amount of additional link bandwidth) into the legacy optical network. In such a hybrid optical network, operators can only change the routes of flows that traverse SDN switches. Therefore, to optimize SDN deployment, it is essential...
Increasing bulk data transfers have been overwhelming the Internet. To overcome this, optical circuit-switched (OCS) networks are equipped with assistive storage, so that bulk data that are delay tolerant can be temporarily stored at intermediate nodes and forwarded at later times. But, the use of storage greatly complicates the routing problem, since data storage must be incorporated into routing...
The dramatic growth of Internet traffic brings challenges for optical network designers. There have been a number of advances recently in increasing fiber bandwidth and spectrum utilization efficiency through elastic optical networking (EON). In EON, a flexible and more fine-grained grid than conventional approaches is employed, and this allows allocated fiber bandwidth to better match traffic demands...
Optical wavelength-routed networks enable parallel transmission of massive datasets on non-overlapping wavelength channels. However, as the sizes of scientific workflows increase, the simple availability of multi-wavelength resources will fall short of supporting application needs. Rather, these resources must be allocated intelligently, efficiently, and flexibly to bear the burden of high-volume...
Software-Defined Optical Network (SDON) incorporates the technologies of Software-Defined Network (SDN) into the comprehensive solutions of traditional optical network, which greatly improves the weaknesses of the traditional optical network, including inadequate enforcement of control, inefficient utilization of resource and so on. Based on the improved SDON architecture, this paper did lots of research...
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