Rec. ITU-T G.1028 (06/2019) - End-to-end quality of service for voice over 4G mobile networks
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Brief introduction on Voice over LTE and assumptions
7 Hypothetical reference models
     7.1 LTE-LTE communication on the same network
     7.2 LTE-LTE communication between two interconnected networks (includes roaming)
     7.3 LTE-3G communication
     7.4 LTE-PSTN communication
8 Aspects of quality of service for voice over LTE services
9 Relevant indicators and quality targets
10 Recommendations for QoS monitoring and troubleshooting
     10.1 Recommended QoS monitoring points
          10.1.1 Measurement points A1, A2 and A3
          10.1.2 Measurement point B
          10.1.3 Measurement points C1, C2 and C3
          10.1.4 Measurement points D1 and D2
          10.1.5 Measurement point E
          10.1.6 Measurement point F
          10.1.7 Measurement points G1, G2 and G3
          10.1.8 Measurement Points H1, H2, H3 and H4
          10.1.9 Measurement point J
     10.2 Monitoring strategy
          10.2.1 Reporting
          10.2.2 Monitoring
          10.2.3 Troubleshooting
     10.3 Available tools in ITU-T standards
          10.3.1 Definition of key performance indicators
          10.3.2 Tools and models for the measurement and prediction of voice quality
          10.3.3 Applicable acceptability thresholds and targets
Annex A  List of degradations encountered by end-users of VoLTE service and their potential causes
     A.1 QoS problem linked to call session performance
     A.2 QoS problem linked to perceived speech quality
Bibliography