Fault Tolerant Rerouting in Broadband Multiclass Networks

Abstract

Modern broadband integrated service digital networks (B-ISDN) must handle multiclass traffic with diverse quality of service (QOS) requirements. The main purpose of our research is to design call rerouting mechanisms which provide rapid restoration of network services in case of link failures. We suggest two approaches: virtual circuit (VC) and virtual path (VP) reroutings. The first approach is more reactive while the latter is more proactive. The applicability conditions for the first approach include the availability of a layered network structure similar to VC/VP architecture which is widely accepted in asynchronous transfer mode (ATM) networks. Another applicability condition is the extent of network failure: VP level restoration is designed for single link failures {the most common in the telecommunication networks. On the other hand, in case of less predictable multiple link failures, VC-level rerouting is appropriate. These two rerouting approaches vary in the amount of time required to carry them out. Though both schemes are designed to work in real time, VP-level rerouting tends to be faster and can be performed in an on-line mode using pre-coModern broadband integrated service digital networks (B-ISDN) must handle multiclass traffic with diverse quality of service (QOS) requirements. The main purpose of our research is to design call rerouting mechanisms which provide rapid restoration of network services in case of link failures. We suggest two approaches: virtual circuit (VC) and virtual path (VP) reroutings. The first approach is more reactive while the latter is more proactive. The applicability conditions for the first approach include the availability of a layered network structure similar to VC/VP architecture which is widely accepted in asynchronous transfer mode (ATM) networks.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1996
Accession Number
ADA441040

Entities

People

  • A. I. Vakhutinsky

Organizations

  • University of Maryland

Tags

Communities of Interest

  • C4I
  • Counter WMD
  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Broadband
  • Communication Systems
  • Computations
  • Computer Networks
  • Databases
  • Heuristic Methods
  • Linear Programming
  • Local Area Networks
  • Mathematical Models
  • Mathematical Programming
  • Network Architecture
  • Network Protocols
  • Optimization
  • Packet Switching
  • Throughput

Fields of Study

  • Computer science

Readers

  • Computer Networking