Table of Contents
FOREWORD
1Scope
2References
3Definitions
4AbbreviationsandAcronyms
5CommunicationsQualityofService:Aframeworkandapproach
5.1AnelaborationondefinitionsforQualityandQualityofService
5.2Aframeworkforthequalityofcommunicationsservices
5.3MatrixforthedeterminationofcommunicationsQoScriteria
5.4RelationshipbetweenQoSandNetworkperformance
5.5FourviewpointsofQoS
5.5.1Customer'srequirementsofQoS
5.5.2QoSofferedbytheserviceprovider
5.5.3QoSachievedordeliveredbytheserviceprovider
5.5.4QoSperceivedbythecustomer
5.6RelationshipbetweenthefourviewpointsofQoS
5.7TheChallengeofIP-relatedQoS
6Conclusion
APPENDIXI-Bibliography Abstract
Gives a framework and definitions for communications quality of service so as to establish a uniform approach to quality of service across the ITU-T and eliminate the confusion resulting from different frameworks and inconsistent definitions. Provides a practical "top-down" path from a general quality definition (ISO 8402) to a QoS definition (ITU-T Rec. E.800) to network performance (ITU-T Rec. I.350, and Y.1540) to a functional breakdown of all components of service quality (the QoS definition matrix of ETSI ETR 003). Also provides four viewpoints of QoS that make the definitions and framework meaningful for everyone: users, vendors, network operators, service providers, etc.
