Real-time communications in homogeneous and hetrogeneous computer networks /
This dissertation studies the problems of providing communication service for real-time applications in high-speed networks. Many real-time systems, including embedded command and control system, industrial process control system, and multimedia system, are inherently distributed and sensitive to de...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739363321&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | This dissertation studies the problems of providing communication service for real-time applications in high-speed networks. Many real-time systems, including embedded command and control system, industrial process control system, and multimedia system, are inherently distributed and sensitive to delay performance. The stringent performance requirements imposed by such systems are not only on computation but also on communication in networks. Furthermore, many real-time systems also have fault-tolerant requirements in the sense that tasks(messages) have to be executed(delivered) on time even if there are faults in the system. In this study we concentrate on designing and managing computer networks to support fault-tolerant real-time communication. The issues to be addressed include network architecture design, fault management, traffic characterization, routing, and resource management. Networks can be classified as either homogeneous or heterogeneous networks. in a homogeneous network all communications are performed using the same protocols. A heterogeneous network consists of multiple homogeneous network segments. In this dissertation, we develop methodologies of fault-tolerant real-time communication for both homogeneous and heterogeneous networks. For homogeneous networks we study wormhole routing network and FDDI high-speed LAN. Among heterogeneous networks we study the ATM-based heterogeneous networks which is believed to be the computer network for the future. We first concentrate on providing real-time message delivery guarantees in a network in the absence of faults. Next we demonstrate how to extend our results to support integrated fault-tolerant real-time communication. Real-time communication is a relatively new area. Much of the work reported in this dissertation is the very first in this field. Compared with the previous work, this disseration makes the following significant contributions. First, we develop distributed regulated transmission control schemes for wormhole routing networks to solve the problem of unfair link access which may severely degrade networks' real-time performance. Second, for FDDI networks, we generalize the existing timing properties, design optimal synchronous bandwidth allocation scheme, and use worst case archivable utilization to evaluate performance of resource management schemes. Third, we develop a methodology to obtain end-to-end delay guarantee in heterogeneous network. Finally, we come up with integrated architecture and management solution to support fault-tolerant real-time communication. |
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| Item Description: | Vita. "Major Subject: Computer Science". |
| Physical Description: | xii, 187 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 174-186. |