The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Network infrastructures for modern telecommunications and cloud service providers face a unique series of challenges. These services require networks which can respond dynamically to changes in workload or traffic profiles, and automate cloud network provisioning and commissioning,. This enables cost effective service offerings and also provides new revenue stream opportunities. This paper describes...
Traditional telecom applications spend more at the link end points to maximize spectral efficiency of long-distance fiber links - see for example recent R&D on coherent transmission devices ; For datacom, spectral efficiency tends to be traded for lower power, cheaper transceiver cost and a network fabric with abundant path diversity. ; Within the datacenter, fiber resources are much more abundant,...
One of the prevalent trends in emerging large scale multi-tenant datacenters is network virtualization using overlays. Here we investigate application performance degradation in such an overlay applied to commodity 10 Gigabit Ethernet networks. We have adopted partition/aggregate as a representative commercial workload that today is deployed on bare metal servers and is notoriously sensitive to latency...
In order to fully realize the potential of Cloud and High Performance Computing (HPC) applications, significant improvement is required in the cost/performance of data center networks. While recent industry standards such as Quantized Congestion Notification (QCN) for Converged Enhanced Ethernet (CEE) have begun to address this issue, there are still significant problems left open. Therefore we propose...
Optical communication systems based on dense wavelength division multiplexing (DWDM) would benefit from the ability to adjust the operating wavelength of a laser transmitter. Previous attempts, including thermal adjustment, etalon based wavelength locking, and various types of optical frequency and phase locked loops such as the Pound-Drever-Hall technique suffer from weaknesses including sensitivity...
The need for improved security has been widely recognized in the information technology industry, particularly for enterprise storage area networks (SANs). However, until recently there has been relatively little development of threat models which specifically address the unique requirements of these networks. In this paper, we present a method for quantifying risk, justifying security upgrade costs,...
Recently, there has been a great deal of interest in the use of wavelets to supplement or replace traditional Fourier transform signal processing. Because wavelet operations can be expressed as either a convolution/correlation operation or a linear filter bank, they are well suited to optical implementations. This paper provides a tutorial on wavelets and the hybrid optical implementation of discrete...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.