The Experts below are selected from a list of 27801 Experts worldwide ranked by ideXlab platform
Keren Bergman - One of the best experts on this subject based on the ideXlab platform.
-
demonstration of asynchronous operation of a multiwavelength optical packet Switched fabric
2010Co-Authors: Caroline P. Lai, Assaf Shacham, Keren BergmanAbstract:Asynchronous wavelength-striped message routing is experimentally demonstrated for a 4 × 4 optical packet-Switched Network test-bed. Asynchronous transmission provides increased interconnection Network flexibility for future high-performance computing systems. Multiwavelength optical packets with 6 × 10-Gb/s payloads are shown correctly routed asynchronously through the Network. Error-free operation with bit-error rates less than 10-12 is confirmed, with an average induced power penalty of 0.5 dB for the six payload wavelengths.
-
Design and Demonstration of an All-Optical Hybrid Packet and Circuit Switched Network Platform for Next Generation Data Centers
2010Co-Authors: H Z Wang, Ajay S Garg, Howard Wang, Keren Bergman, Michael GlickAbstract:The design of a reconfigurable 4x4 photonic switch simultaneously supporting both packet and circuit switching is proposed and experimentally validated. Error-free operation and routing correctness is verified for pseudorandom 4x10-Gb/s packets and a 10-Gb/s stream.
-
SC - Circuit-Switched Memory Access in Photonic Interconnection Networks for High-Performance Embedded Computing
2010Co-Authors: Gilbert Hendry, Eric Robinson, Vitaliy Gleyzer, Johnnie Chan, Luca P. Carloni, Nadya T. Bliss, Keren BergmanAbstract:As advancements in CMOS technology trend toward ever increasing core counts in chip multiprocessors for high-performance embedded computing, the discrepancy between on- and off-chip communication bandwidth continues to widen due to the power and spatial constraints of electronic off-chip signaling. Silicon photonics-based communication offers many advantages over electronics for Network-on-chip design, namely power consumption that is effectively agnostic to distance traveled at the chip- and board-scale, even across chip boundaries. In this work we develop a design for a photonic Network-on-chip with integrated DRAM I/O interfaces and compare its performance to similar electronic solutions using a detailed Network-on-chip simulation. When used in a circuit-Switched Network, silicon nanophotonic switches offer higher bandwidth density and low power transmission, adding up to over 10x better performance and 3-5x lower power over the baseline for projective transform, matrix multiply, and Fast Fourier Transform (FFT), all key algorithms in embedded real-time signal and image processing.
-
Cross-layer communication with an optical packet Switched Network via a message injection control interface
2008Co-Authors: Caroline P. Lai, Howard Wang, Keren BergmanAbstract:Message injection control and queue management for an optical packet Switched Network is demonstrated via interoperation of a Network with an optical interface buffer. In a time-slotted manner, cross-layer signaling is employed between the input buffer and Network to dynamically reroute dropped payload packets with multiple wavelength-striped 10-Gb/s channels. At the output of the Network, error-free transmission with bit-error-rates less than were confirmed, with an introduced power penalty of 3.5 dB.
-
on the design of a photonic Network on chip
2007Co-Authors: Assaf Shacham, Keren Bergman, Luca P. CarloniAbstract:Recent remarkable advances in nanoscale silicon-photonic integrated circuitry specifically compatible with CMOS fabrication have generated new opportunities for leveraging the unique capabilities of optical technologies in the on-chip communications infrastructure. Based on these nano-photonic building blocks, we consider a photonic Network-on-chip architecture designed to exploit the enormous transmission bandwidths, low latencies, and low power dissipation enabled by data exchange in the optical domain. The novel architectural approach employs a broadband photonic circuit-Switched Network driven in a distributed fashion by an electronic overlay control Network which is also used for independent exchange of short messages. We address the critical Network design issues for insertion in chip multiprocessors (CMP) applications, including topology, routing algorithms, path-setup and tear-down procedures, and deadlock avoidance. Simulations show that this class of photonic Networks-on-chip offers a significant leap in the performance for CMP intrachip communication systems delivering low-latencies and ultra-high throughputs per core while consuming minimal power
Sudhir Dixit - One of the best experts on this subject based on the ideXlab platform.
-
A unified study of contention-resolution schemes in optical packet-Switched Networks
2003Co-Authors: Shun Yao, Biswanath Mukherjee, S. J. B. Yoo, Sudhir DixitAbstract:This paper presents a comprehensive study of contention-resolution schemes in a multiwavelength optical packet-Switched Network. This investigation aims to provide a unified study of a Network of optical routers, which include contention resolution in wavelength, time, and space dimensions. Specifically, we show: 1) how to accommodate all three dimensions of contention resolution in an integrated optical router; 2) how the performance of the three dimensions compare with one another; and 3) how various combinational schemes can be designed and how they perform. With the representative architectures and Network topologies studied in this paper, the simulation experiment results capture the characteristics of different contention-resolution schemes, and they quantify the upper-bound average offered transmitter load for these schemes. The combinational contention resolution schemes are shown to effectively resolve packet contention and achieve good Network performance under light to intermediate load.
-
all optical packet Switched Networks a study of contention resolution schemes in an irregular mesh Network with variable sized packets
2000Co-Authors: Shun Yao, Biswanath Mukherjee, S Ben J Yoo, Sudhir DixitAbstract:This paper presents a comparative study of contention-resolution schemes based on wavelength, time, and space domains in an unslotted optical packet-Switched Network with a large irregular mesh topology consisted of 15 nodes. For the first time, to the best of our knowledge, we investigated the effect of selective deflection and limited wavelength conversion. Features and performances of different combinational schemes are listed and compared. While simulation results show the effectiveness of wavelength conversion for resolving contentions over optical buffering and space deflection, physical explanations of the different effectiveness in resolving contentions of these schemes are also discussed.
Dimitra Simeonidou - One of the best experts on this subject based on the ideXlab platform.
-
Programmable on-chip and off-chip Network architecture on demand for flexible optical intra-Datacenters.
2013Co-Authors: Bijan Rahimzadeh Rofoee, Yixuan Qin, Georgios S. Zervas, Norberto Amaya, Yan Yan, Dimitra SimeonidouAbstract:The paper presents a novel Network architecture on demand approach using on-chip and-off chip implementations, enabling programmable, highly efficient and transparent Networking, well suited for intra-datacenter communications. The implemented FPGA-based adaptable line-card with on-chip design along with an architecture on demand (AoD) based off-chip flexible switching node, deliver single chip dual L2-Packet/L1-time shared optical Network (TSON) server Network Interface Cards (NIC) interconnected through transparent AoD based switch. It enables hitless adaptation between Ethernet over wavelength Switched Network (EoWSON), and TSON based sub-wavelength switching, providing flexible bitrates, while meeting strict bandwidth, QoS requirements. The on and off-chip performance results show high throughput (9.86Ethernet, 8.68Gbps TSON), high QoS, as well as hitless switch-over.
-
dynamic optical Network architectures and technologies for existing and emerging grid services
2005Co-Authors: Dimitra Simeonidou, Reza Nejabati, Georgios Zervas, Dimitrios Klonidis, Anna Tzanakaki, M J OmahonyAbstract:This paper presents solutions towards an efficient and intelligent Network infrastructure for Grid services, taking advantage of recent developments in optical-Networking technologies. Two lambda-Grid Network architectures based on extensions to existing wavelength-Switched Network infrastructure are discussed. These Network solutions aim to provide a user-centric Grid environment, specifically for data-intensive and e-science applications. Furthermore, a novel solution towards an intelligent and ubiquitous photonic-Grid Network based on optical burst switching (OBS) is proposed. The proposed solution utilizes active optical burst-Switched routers and advanced protocols in order to provide a programmable photonic-Grid Network infrastructure for evolving data-intensive and emerging Grid applications.
Lodewijk T. Smit - One of the best experts on this subject based on the ideXlab platform.
-
An energy-efficient reconfigurable circuit-Switched Network-on-chip
2005Co-Authors: Pascal T. Wolkotte, Gerard K. Rauwerda, Gerard J. M. Smit, Lodewijk T. SmitAbstract:Network-on-Chip (NoC) is an energy-efficient on-chip communication architecture for multi-tile System-on-Chip (SoC) architectures. The SoC architecture, including its run-time software, can replace inflexible ASICs for future ambient systems. These ambient systems have to be flexible as well as energy-efficient. To find an energy-efficient solution for the communication Network we analyze three wireless applications. Based on their communication requirements we observe that revisiting of the circuit switching techniques is beneficial. In this paper we propose a new energy-efficient reconfigurable circuit-Switched Network-on-Chip. By physically separating the concurrent data streams we reduce the overall energy consumption. The circuit-Switched router has been synthesized and analyzed for its power consumption in 0.13 µm technology. A 5-port circuit-Switched router has an area of 0.05 mm^2 and runs at 1075 MHz. The proposed architecture consumes 3.5 times less energy compared to its packet-Switched equivalent.
Shun Yao - One of the best experts on this subject based on the ideXlab platform.
-
A unified study of contention-resolution schemes in optical packet-Switched Networks
2003Co-Authors: Shun Yao, Biswanath Mukherjee, S. J. B. Yoo, Sudhir DixitAbstract:This paper presents a comprehensive study of contention-resolution schemes in a multiwavelength optical packet-Switched Network. This investigation aims to provide a unified study of a Network of optical routers, which include contention resolution in wavelength, time, and space dimensions. Specifically, we show: 1) how to accommodate all three dimensions of contention resolution in an integrated optical router; 2) how the performance of the three dimensions compare with one another; and 3) how various combinational schemes can be designed and how they perform. With the representative architectures and Network topologies studied in this paper, the simulation experiment results capture the characteristics of different contention-resolution schemes, and they quantify the upper-bound average offered transmitter load for these schemes. The combinational contention resolution schemes are shown to effectively resolve packet contention and achieve good Network performance under light to intermediate load.
-
all optical packet Switched Networks a study of contention resolution schemes in an irregular mesh Network with variable sized packets
2000Co-Authors: Shun Yao, Biswanath Mukherjee, S Ben J Yoo, Sudhir DixitAbstract:This paper presents a comparative study of contention-resolution schemes based on wavelength, time, and space domains in an unslotted optical packet-Switched Network with a large irregular mesh topology consisted of 15 nodes. For the first time, to the best of our knowledge, we investigated the effect of selective deflection and limited wavelength conversion. Features and performances of different combinational schemes are listed and compared. While simulation results show the effectiveness of wavelength conversion for resolving contentions over optical buffering and space deflection, physical explanations of the different effectiveness in resolving contentions of these schemes are also discussed.
