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

Research output: Contribution to journalJournal article

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  • G COULSON
  • A CAMPBELL
  • P ROBIN
  • G BLAIR
  • M PAPATHOMAS
  • William Shepherd
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<mark>Journal publication date</mark>05/1995
<mark>Journal</mark>IEEE Journal on Selected Areas in Communications
Issue number4
Volume13
Number of pages14
Pages (from-to)686-699
<mark>State</mark>Published
<mark>Original language</mark>English

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.