| 1. |
- Forsberg, Håkan, 1969-, et al.
(författare)
-
Opportunities for Optical Planar Interconnection Technology in Terabit Switches
- 2003
-
Ingår i: Proceedings of the IASTED International Conference on Wireless and Optical Communications, July 2-4, 2003, Banff, Canada. - Anaheim; Calgary : ACTA Press. - 0889863741 - 9780889863743 ; , s. 155-164
-
Konferensbidrag (refereegranskat)abstract
- To keep up with the explosive growth of world-wide network traffic, large-capacity switches, with switching capacities in excess of several terabits per second, are becoming an essential part of the future. To realize such switches, new architecture concepts must be considered. In this paper, we discuss a technology for terabit switches that combines the advantage of using optical communication in all three spatial dimensions and the benefits of using surface mounted optoelectronic as well as electronic chips. We present three different types of packet-based switch fabrics, all based on the optical planar interconnection technology. We then discuss these in terms of capacity, scalability, and physical size. All three implementations have a single switch plane cross sectional bandwidth exceeding 5 Tbps.
|
|
| 2. |
- Forsberg, Håkan, et al.
(författare)
-
A scalable and pipelined embedded signal processing system using optical hypercube interconnects
- 2000
-
Ingår i: Proceedings of the 12th IASTED International Conference on Parallel and Distributed Computing and Systems (PDCS 2000), Las Vegas, NV, USA, Nov. 6-9, 2000. - Las Vegas : IASTED. ; , s. 265-272
-
Konferensbidrag (refereegranskat)abstract
- In this paper, we propose a system suitable for embedded signal processing with extreme performance demands. The system consists of several computational modules that work independently and send data simultaneously in order to achieve high throughput. Each computational module is composed of multiple processors connected in a hypercube topology to meet scalability and high bisection bandwidth requirements. Free-space optical interconnects and planar packaging technology make it possible to transform the hypercubes into planes and to take advantage of many optical properties. For instance, optical fan-out reduces hardware cost. This, altogether, makes the system capable of meeting high performance demands in, e.g., massively parallel signal processing. An example system with eleven computational modules and an overall peak performance greater than 2.8 TFLOPS is presented. The effective inter-module bandwidth in this configuration is 1,024 Gbit/s.
|
|
| 3. |
|
|
| 4. |
- Forsberg, Håkan, et al.
(författare)
-
Embedded Signal Processing Using Free-Space Optical Hypercube Interconnects
- 2003
-
Ingår i: Optical Networks Magazine. - : Springer-Verlag. - 1572-8161 .- 1388-6916. ; 4:4, s. 35-49
-
Tidskriftsartikel (refereegranskat)abstract
- The speed and complexity of integrated circuits are increasing rapidly. For instance, today's mainstream processors have already surpassed gigahertz global clock frequencies on-chip. As a consequence, many algorithms proposed for applications in embedded signal-processing (ESP) systems, e.g. radar and sonar systems, can be implemented with a reasonable number (less than 1000) of processors, at least in terms of computational power. An extreme inter-processor network is required, however, to completely implement those algorithms. The demands are such that completely new interconnection architectures must be considered.In the search for new architectures, developers of parallel computer systems can actually take advantage of optical interconnects. The main reason for introducing optics from a system point of view is the strength in using benefits that enable new architecture concepts, e.g. free-space propagation and easy fan-out, together with benefits that can actually be exploited by simply replacing the electrical links with optical ones without changing the architecture, e.g. high bandwidth and complete galvanic isolation.In this paper, we propose a system suitable for embedded signal processing with extreme performance demands. The system consists of several computational modules that work independently and send data simultaneously in order to achieve high throughput. Each computational module is composed of multiple processors connected in a hypercube topology to meet scalability and high bisection bandwidth requirements. Free-space optical interconnects and planar packaging technology make it possible to arrange the hypercubes as planes with an associated three-dimensional communications space and to take advantage of many optical properties. For instance, optical fan-out reduces hardware cost. Altogether, this makes the system capable of meeting high performance demands in, for example, massively parallel signal processing. One 64-channel airborne radar system with nine computational modules and a sustained computational speed of more than 1.6 Tera floating point operations per second (TFLOPS) is presented. The effective inter-module bandwidth in this configuration is 1 024 Gbit/s.
|
|
| 5. |
|
|
| 6. |
- Forsberg, Håkan, 1969
(författare)
-
Optical Interconnection Architectures for High-Performance Computers and Switches
- 2003
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The incredible growth in processing power and switching capacity in high-performance computers and switches puts very high demands on the interconnection networks. This is recognized in particular in massively parallel processing and extreme switching architectures. The demands are such that new interconnection architectures must be considered. In this thesis, we give close consideration to the characteristics of both optics and electronics in order to find new interconnection architectures. We also explore how optical interconnections can provide a new design space for developers of parallel computer systems. We believe that planar integrated free-space optics technology is a strong candidate for implementing the kind of interconnection networks considered necessary for the applications studied in this thesis. We therefore base our work on new interconnection architectures on this technology. Our approach is to try to fit algorithms, architectures and physical implementations to each other to offer systems with high performance. The thesis gives important input in the form of examples to show the advantages of using optical interconnections in the designs of future high-performance embedded signal processing systems and switches and routers. We show how the use of free-space optical interconnections makes it possible to implement heavily cross-connected and complicated network topologies suitable for embedded signal processing. We also demonstrate that totally different switch fabric architectures can make use of optical technologies to facilitate the design of deeply cross-connected high capacity switches. The results show that several expected requirements of future embedded signal processing systems and terabit switches and routers can be met using optical solutions over short distances, e.g. the chip-to-chip or board-to-board level.
|
|
| 7. |
|
|
| 8. |
- Forsberg, Håkan, et al.
(författare)
-
Radar signal processing using pipelined optical hypercube interconnects
- 2001
-
Ingår i: Proceedings of the 15th International Parallel and Distributed Processing Symposium. - Los Alamitos, California : IEEE Computer Society Press. - 0769509908 ; , s. 2043-2052
-
Konferensbidrag (refereegranskat)abstract
- In this paper, we consider the mapping of two radar algorithms on a new scalable hardware architecture. The architecture consists of several computational modules that work independently and send data simultaneously in order to achieve high throughput. Each computational module is composed of multiple processors connected in a hypercube topology to meet scalability and high bisection bandwidth requirements. Free-space optical interconnects and planar packaging technology make it possible to transform the hypercubes into planes. Optical fan-out reduces the number of optical transmitters and thus the hardware cost. Two example systems are analyzed and mapped onto the architecture. One 64-channel airborne radar system with a sustained computational load of more than 1.6 TFLOPS, and one ground-based 128-channel radar system with extreme inter-processor communication demands.
|
|
| 9. |
|
|
