Accession Number:

ADA126213

Title:

Steady State Performance of Survivable Routing Procedures for Circuit-Switched Mixed-Media Networks.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1982-12-29

Pagination or Media Count:

88.0

Abstract:

Three classes of new mixed-media routing procedures are presented for networks with both broadcast and point-to-point transmission media such as the Defense Switched Network. All procedures treat satellite and terrrestrial links separately and use common channel signaling to pass call setup information between switches. Mixed-media routing procedures use fixed routing tables and three different call processing rules. Adaptive-mixed-media routing procedures adapt routing tables when parts of the network are destroyed. Precedence flooding procedures route low-priority calls using mixed-media procedures and high-priority calls using flooding techniques. A steady state network analysis program was modified to evaluate the performance of 1 mixed-media routing with spill-forward control, 2 mixed-media routing with remote earth station querying and 3 adaptive mixed-media routing. These new routing procedures were compared to modified forward routing and primary path only routing using 20 and 40 node mixed-media networks under overload, with various patterns of offered traffic, and with different amounts and types of network damage. The new routing procedures studied, especially adaptive-mixed-media routing, substantially enhanced network performance after damage. These procedures did not reduce the average point-to-point blocking probability. They did, however, improve the service provided to the most poorly served group of users and they denied the possibility of call completion to the fewest users.

Subject Categories:

  • Electrical and Electronic Equipment
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE