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The design of a QoS-controlled ATM-based communications system in Chorus

Research output: Contribution to journalJournal article

Published

  • G COULSON
  • A CAMPBELL
  • P ROBIN
  • G BLAIR
  • M PAPATHOMAS
  • William Shepherd
Journal publication date05/1995
JournalIEEE Journal on Selected Areas in Communications
Journal number4
Volume13
Number of pages14
Pages686-699
Original languageEnglish

Abstract

We describe the design of an application platform able to run distributed real-time and multimedia applications alongside conventional UNIX programs, The platform is embedded in a microkernel/PC environment and supported by an ATM-based, QoS-driven communications stack, In particular, me focus on resource-management aspects of the design and deal with CPU scheduling, network resource-management and memory-management issues. An architecture is presented that guarantees QoS levels of both communications and processing with varying degrees of commitment as specified by user-level QoS parameters. The architecture uses admission tests to determine whether or not new. activities can be accepted and includes modules to translate user-level QoS parameters into representations usable by the scheduling, network, and memory-management subsystems.