1 Introduction and Scope
1.1
Introduction
1.2
Scope
2
References
3
Abbreviations, acronyms and conventions
3.1
Abbreviations and acronyms
3.2
Conventions
4
Transfer capacity, capacity agreements, and the applicability of QoS
classes
5
Network performance objectives
5.1
General discussion of QoS
5.2
Reference path for UNI to UNI QoS
5.3
Network QoS classes
6
Availability objectives
7
Achievement of the performance objectives
8
Concatenating network sections and their QoS values
8.1 Introduction
8.2 Composing
UNI-UNI values
8.3
Impairment accumulation procedures
9
Security
Appendix I – ATM network QoS support of IP QoS
Appendix II – IP delay variation parameter definition considerations
Appendix III – Example hypothetical reference paths for validating the
IP performance objectives
III.1
Number IP nodes in the HRP
III.2
Example computations to support end-end class 0 and class 1 delay
III.3
Example end-end class 1 delay computation
III.4
Example computations to support end-end class 4 delay
III.5
Loading within the HRP
III.6
Geostationary satellites within the HRP
Appendix IV – Example calculations of IP packet delay variation
IV.1
Contributors to IP packet delay variation
IV.2
Models and calculation procedures to establish an upper bound to the
IPDV
IV.3
Calculation examples
Appendix V – Material relevant to IP performance measurement methods
Appendix VI – Applicability of the Y.1221 transfer capabilities and IETF
differentiated services to IP QoS classes
Appendix VII – Effects of network QoS on end-to-end speech transmission
performance as perceived by the user
VII.1
Example VoIP calculations with ITU-T Y.1541 class 0 network performance
VII.2
Example VoIP calculations with ITU-T Y.1541 class 1 network performance
VII.3
Speech quality calculations for ITU-T Y.1541 hypothetical reference
paths
Appendix VIII – Effects of IP network performance on digital television
transmission QoS
VIII.1
Introduction
VIII.2
Hypothetical reference endpoint (HRE) for high-bandwidth video signals
VIII.3
Service profiles and end-to-end packet performance requirements
VIII.4
Forward error correction (FEC)/Interleaving to improve UNI-UNI
performance
VIII.5
Laboratory assessment of forward error correction (FEC)/Interleaving
effectiveness
VIII.6
Additional performance parameters
VIII.7
Further analysis with advanced FEC schemes
VIII.8
Analysis of retransmission schemes
VIII.9
Recovery from errors and losses due to protection switching schemes
Appendix IX – Effects of network QoS on end-to-end data transmission
performance using TCP
IX.1
Introduction
IX.2
Model of TCP performance
IX.3
TCP hypothetical reference endpoint (HRE)
IX.4
Observations
IX.5
Summary of TCP capacity estimates
Appendix X – An example showing how to calculate IPDV across multiple
sections
X.1
Calculation of delay variation
X.2
Mathematical background
X.3
Special cases
X.4
Estimating skewness from quantiles
Appendix XI – Digital circuit (ISDN) emulation requirements on IP-based
networks
XI.1
Introduction
XI.2
Packetization and transport assumptions
XI.3
Range of packet loss requirements
XI.4
Effect of forward error correction
Bibliography