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Fiber-Optic Interconnections in High-Performance Real-Time Computer Systems
Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Embedded Systems (CERES).ORCID iD: 0000-0002-6526-3931
1997 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Future parallel computer systems for embedded real-time applications,where each node in itself can be a parallel computer, are predicted to havevery high bandwidth demands on the interconnection network. Otherimportant properties are time-deterministic latency and guarantees to meetdeadlines. In this thesis, a fiber-optic passive optical star network with amedium access protocol for packet switched communication in distributedreal-time systems is proposed. By using WDM (Wavelength DivisionMultiplexing), multiple channels, each with a capacity of several Gb/s, areobtained.

A number of protocols for WDM star networks have recently been proposed.However, the area of real-time protocols for these networks is quiteunexplored. The protocol proposed in this thesis is based on TDMA (TimeDivision Multiple Access) and uses a new distributed slot-allocationalgorithm with real-time properties. Services for both guarantee-seekingmessages and best-effort messages are supported for single destination,multicast, and broadcast transmission. Slot reserving can be used toincrease the time-deterministic bandwidth, while still having an efficientbandwidth utilization due to a simple slot release method.

By connecting several clusters of the proposed WDM star network by abackbone star, thus forming a star-of-stars network, we get a modular andscalable high-bandwidth network. The deterministic properties of thenetwork are theoretically analyzed for both intra-cluster and inter-clustercommunication, and computer simulations of intra-cluster communicationare reported. Also, an overview of high-performance fiber-opticcommunication systems is presented.

Place, publisher, year, edition, pages
1997. , 21 p.
Series
Technical report / School of Electrical and Computer Engineering, Chalmers University of Technology.L, 262
Keyword [en]
Fiber-optic communication, Real-time communication
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:hh:diva-3077ISBN: 91-71997-494-6 OAI: oai:DiVA.org:hh-3077DiVA: diva2:241312
Presentation
(English)
Available from: 2009-10-05 Created: 2009-10-02 Last updated: 2014-01-23Bibliographically approved
List of papers
1. Time-deterministic WDM star network for massively parallel computing in radar systems
Open this publication in new window or tab >>Time-deterministic WDM star network for massively parallel computing in radar systems
1996 (English)In: Proceedings of the Third International Conference on Massively Parallel Processing Using Optical Interconnections: October 27-29, 1996, Maui, Hawaii / [ed] Allan Gottlieb, Los Alamitos, California: IEEE Computer Society Press , 1996, 85-93 p.Conference paper, (Refereed)
Abstract [en]

In massively parallel computer systems for embedded real-time applications there are normally very high bandwidth demands on the interconnection network. Other important properties are time-deterministic latency and services to guarantee that deadlines are met. In this paper we analyze how these properties vary with the design parameters for a passive optical star network, specifically when used in a massively parallel radar signal processing system. The aggregated bandwidth and computational power of the radar system are approximately 45 Gb/s and 100 GOPS, respectively. The analysis is focused on the medium access control protocol, called TD-TWDMA, for the time and wavelength multiplexed network. It is concluded that the proposed network is very well suited to this kind of signal-processing applications. We also present a new distributed slot-allocation algorithm with real-time properties.

Place, publisher, year, edition, pages
Los Alamitos, California: IEEE Computer Society Press, 1996
Keyword
Fiber-optic communication, Real-time communication
National Category
Computer Engineering
Identifiers
urn:nbn:se:hh:diva-2733 (URN)10.1109/MPPOI.1996.559046 (DOI)A1996BG68E00012 ()2-s2.0-0030389248 (Scopus ID)2082/3135 (Local ID)0-8186-7591-8 (ISBN)2082/3135 (Archive number)2082/3135 (OAI)
Conference
Third International Conference on Massively Parallel Processing Using Optical Interconnections, October 27-29, 1996, Maui, Hawaii
Note

©1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Available from: 2009-08-12 Created: 2009-08-12 Last updated: 2017-02-08Bibliographically approved
2. On inter-cluster communication in a time-deterministic WDM star network
Open this publication in new window or tab >>On inter-cluster communication in a time-deterministic WDM star network
1997 (English)In: Proc. 2nd Workshop on Optics and Computer Science (WOCS), Geneva, Switzerland, Apr. 1, 1997, 1997, 10- p.Conference paper, (Refereed)
Abstract [en]

Future real-time applications requiring massively parallel computer systems also put high demands on the interconnection network. By connecting several WDM star clusters by a backbone star, forming a star-of-stars network, we get a modular high-bandwidth network. In this paper we show how to achieve time-deterministic packet switched communication in such networks, even for inter-cluster communication. An analysis of how the deterministic latency and node bandwidth vary with design parameters is presented. We also propose a general clock-synchronization scheme, improving the worst-case latency with up to 33 percentages.

Keyword
Fiber-optic communication, Real-time communication
National Category
Computer Engineering
Identifiers
urn:nbn:se:hh:diva-2768 (URN)2082/3170 (Local ID)2082/3170 (Archive number)2082/3170 (OAI)
Available from: 2009-08-13 Created: 2009-08-13 Last updated: 2017-06-02Bibliographically approved
3. A fiber-optic interconnection concept for scaleable massively parallel computing
Open this publication in new window or tab >>A fiber-optic interconnection concept for scaleable massively parallel computing
1995 (English)In: Proceedings of the Second International Conference on Massively Parallel Processing Using Optical Interconnections: October 23 - 24, 1995, San Antonio, Texas, Piscataway, NJ.: IEEE , 1995, 313-320 p.Conference paper, (Refereed)
Abstract [en]

One of the most important features of interconnection networks for massively parallel computer systems is scaleability. The fiber-optic network described in this paper uses both wavelength division multiplexing and a configurable ratio between optics and electronics to gain an architecture with good scaleability. The network connects distributed modules together to a huge parallel system where each node itself typically consists of parallel processing elements. The paper describes two different implementations of the star topology, one uses an electronic star and fiber optic connections, the other is purely optical with a passive optical star in the center. The medium access control of the communication concept is presented and some scaleability properties are discussed involving also a multiple-star topology.

Place, publisher, year, edition, pages
Piscataway, NJ.: IEEE, 1995
Keyword
Fiber-optic communication, Real-time communication
National Category
Computer Engineering
Identifiers
urn:nbn:se:hh:diva-2766 (URN)10.1109/MPPOI.1995.528658 (DOI)2-s2.0-0029505673 (Scopus ID)2082/3168 (Local ID)0-8186-7101-7 (ISBN)2082/3168 (Archive number)2082/3168 (OAI)
Note
©1995 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.Available from: 2009-08-13 Created: 2009-08-13 Last updated: 2014-08-21Bibliographically approved
4. Dynamic time-deterministic traffic in a fiber-optic WDM star network
Open this publication in new window or tab >>Dynamic time-deterministic traffic in a fiber-optic WDM star network
1997 (English)In: Proceedings: Ninth Euromicro Workshop on Real Time Systems, June 11-13, 1997, Toledo, Spain, Piscataway, NJ.: IEEE Computer Society, 1997, 25-33 p.Conference paper, (Refereed)
Abstract [en]

A number of protocols for WDM (Wavelength Division Multiplexing) star networks have been proposed. However, the area of real-time protocols for these networks is quite unexplored. In this paper, a real-time protocol, based on TDM (Time Division Multiplexing), for fiber-optic star networks is presented. By the use of WDM, multiple Gb/s channels are achieved. Services for both guarantee-seeking messages and best-effort messages are supported for single destination, multicast, and broadcast transmission. Slot reserving can be used to increase the time-deterministic bandwidth, while still having an efficient bandwidth utilization due to a simple slot release method. The deterministic properties of the protocol are analyzed and simulation results presented.

Place, publisher, year, edition, pages
Piscataway, NJ.: IEEE Computer Society, 1997
Keyword
Fiber-optic communication, Real-time communication
National Category
Computer Engineering
Identifiers
urn:nbn:se:hh:diva-2765 (URN)10.1109/EMWRTS.1997.613760 (DOI)A1997BJ25Z00004 ()2082/3167 (Local ID)0-8186-8034-2 (ISBN)2082/3167 (Archive number)2082/3167 (OAI)
Conference
Ninth Euromicro Workshop on Real Time Systems, June 11-13, 1997, Toledo, Spain
Note
©1997 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.Available from: 2009-08-13 Created: 2009-08-13 Last updated: 2014-01-23Bibliographically approved
5. High-performance fiber-optic communication networks for distributed computing systems
Open this publication in new window or tab >>High-performance fiber-optic communication networks for distributed computing systems
1997 (English)Report (Other academic)
Abstract [en]

Interconnection networks have a key role in distributed processing systems of today but to follow the evolution in processing power, new technologies are needed. Multiple-channel fiber-optic communication can solve the emerging demand of bandwidth. New protocols must, however, be used to coordinate the use of multiple high-speed channels. This paper describes protocols and fiber-optic network architectures that are considered to be useful as flexible interconnection networks in future parallel and distributed computing systems. Also, a short overview of system components and system technologies is presented.

Publisher
45 p.
Series
Research report, Centre for Computer Systems Architecture (CCA), Halmstad University, Sweden, CCA-9709
Keyword
Fiber-optic communication
National Category
Computer Engineering
Identifiers
urn:nbn:se:hh:diva-49 (URN)
Available from: 2009-08-25 Created: 2009-08-24 Last updated: 2014-01-23Bibliographically approved

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