Defense Data Network (DDN) performance analysis using probability modeling
By: Donal P. Gaver, Patricia A. Jacobs
Contributors: Jacobs, Patricia A.; Naval Postgraduate School (U.S.). Dept. of Operations Research
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1990
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 60
Subjects: DEFENSE SYSTEMS; COMMUNICATIONS NETWORKS; PACKET SWITCHING; DATA TRANSMISSION SYSTEMS
Other titles: NPS-55-90-13.
Description: The Data Defense Network (DDN) is a large packet switching network that services      elements of the U.S. Department of Defense (DOD). The emphasis of this report is to      perform probabilistic analysis of certain features of the DDN system with a view of enhancing      or 'optimizing' measures of service such as data base throughput and the waiting times      experienced by data-base-transfer customers. The particular questions addressed, and the      models constructed, are in response to tasking statements supplied by personnel from the      Defense Communications Engineering Center, Reston, Virginia. In Section 2 models are      presented to study the optimal length of a packet subject to transmission errors. When a data      transfer is to occur the total collection of bits that comprise the data base is divided into      packets, i.e., subcollections of contiguous bits from the data base plus a header carrying      address information. In Section 3 models are introduced to study the effect on D's buffer of all      sources retransmitting at a retransmission interval of length 8. We also model the behavior of      one form of congestion control, exponential backoff, a procedure that increases successive      time-out intervals possibly from 8 to 28, 28 to 48, etc. In summary, probabilistic models have      been constructed to study the effect of packet size and message size on system throughput      and response time of a data-transfer operation. The effect of packet retransmission on      response times has also been evaluated. (KR)
Notes: Title from cover.

"NPS-55-90-13."

"July 1990."

AD A226 856.

Includes bibliographical references (p. 60)

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