CONTENTS

1 Scope
2 Related Recommendations
3 Abbreviations
4 Grade of service parameters
4.1 Post-selection delay
4.1.1 Authentication and privacy
4.1.2 Paging/alerting of a terminal/user
4.1.3 Routing number transfer
4.2 Answer signal delay
4.3 Call release delay
4.4 Probability of end-to-end blocking
4.5 Probability of unsuccessful land cellular handover
4.5.1 Definition of probability of unsuccessful land cellular handover
5 Target values for GOS parameters cellular systems
5.1 Post-selection delay
5.1.1 Post-selection delay in the fixed network
5.1.2 Delay in authentication and cipher mode setting
5.1.3 Paging/alerting delay
5.1.4 Delay in obtaining routing number
5.1.5 Target values for post-selection delays
5.2 Answer signal delay
5.3 Call release delay
5.3.1 Target values for call release delay
5.4 Probability of end-to-end blocking
5.4.1 Probability of blocking on the radio channels
5.4.2 Target values for blocking on the radio channels
5.4.3 Probability of blocking on PLMN-to-fixed network circuits
5.4.4 Target values for blocking on PLMN-to-fixed network circuits
5.5 Probability of unsuccessful land cellular handover
5.5.1 Target values for probability of unsuccessful handover handling
6 Target values for GOS parameters non-cellular systems
7 History
Bibliography
Annex A
Handover process
A.1 Example of handover process
Annex B
Cellular systems
B.1 Post-selection delay