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Content for TR 23.707 Word version: 13.0.0

1… 5…

5.1 Functions Common to both PS and CS Domain 5.2 PS Domain Specific Functions 5.3 CS Domain Specific Functions 5.4 Other procedures

5 Elementary Functions p. 8

5.1 Functions Common to both PS and CS Domain p. 8

5.1.1 Identification of association with dedicated CN nodes p. 8

5.1.1.0 Description p. 8

5.1.1.1 Solutions p. 8

5.1.1.1.1 New Subscription Information p. 8

5.1.1.2 Evaluations and Conclusions p. 8

5.1.2 Considerations for Roaming p. 8

5.1.3 Considerations for Network Sharing p. 8

5.2 PS Domain Specific Functions p. 8

5.2.1 Assignment of dedicated MME/SGSN p. 9

5.2.1.1 Assignment during Attach and TAU/RAU p. 9

5.2.1.1.1 E-UTRAN Attach and TAU p. 9

5.2.1.1.2 UTRAN GPRS Attach and RAU p. 21

5.2.1.1.3 GERAN GPRS Attach and RAU p. 22

5.2.1.2 Assignment during Handover p. 22

5.2.1.2.1 Scenarios p. 22

5.2.1.2.2 Solutions p. 23

5.2.1.3 Evaluation and Conclusion p. 23

5.2.1.3.1 Evaluation p. 23

5.2.1.3.2 Conclusion p. 26

5.2.2 Maintaining Dedicated CN Nodes p. 26

5.2.2.1 CN node change by TAU/RAU p. 26

5.2.2.1.1 Scenario Description p. 26

5.2.2.1.2 Solutions p. 26

5.2.2.1.3 Evaluations and Conclusions p. 28

5.2.2.2 CN node change by handover p. 29

5.2.2.2.1 Scenario Description p. 29

5.2.2.2.2 Solutions p. 30

5.2.2.2.3 Evaluations and Conclusions p. 30

5.2.3 Selection Function of dedicated SGW and PGW p. 30

5.2.3.1 Dedicated SGW Selection p. 30

5.2.3.1.1 Scenarios p. 30

5.2.3.1.2 Solutions p. 30

5.2.3.1.3 Evaluations and Conclusions p. 31

5.2.3.2 Dedicated PGW Selection p. 31

5.2.3.2.1 Scenarios p. 31

5.2.3.2.2 Solutions p. 31

5.2.3.2.3 Evaluations and Conclusions p. 31

5.2.4 HSS-initiated Dedicated CN Node Reselection p. 31

5.2.4.1 Scenario Description p. 31

5.2.4.2 Solutions p. 32

5.2.4.2.1 Solution 1: Combination of S1/Iu Release with Load balancing TAU/RAU and Detach with Reattach Required p. 32

5.2.4.2.2 Solution 2: Using Cancel Location with Reattach for HSS-initiated Dedicated CN Node Reselection p. 33

5.2.4.2.3 Solution 3: GUTI reallocation before TAU or Re-Attach p. 34

5.2.4.2.4 Solution 4: MME triggered S1 handover p. 36

5.2.4.3 Evaluations and Conclusions p. 36

5.3 CS Domain Specific Functions p. 36

5.3.1 Assignment of dedicated MSC p. 36

5.3.1.1 Assignment during Attach p. 36

5.3.1.1.1 E-UTRAN Attach p. 36

5.3.1.1.2 UTRAN Attach p. 36

5.3.1.1.3 GERAN Attach p. 37

5.3.2 Maintaining Dedicated CN Nodes p. 37

5.3.2.1 CN node change by Combined TAU/LAU/Combined RAU/LAU/LAU only p. 37

5.3.2.1.1 Scenario Description p. 37

5.3.2.1.2 Solutions p. 37

5.3.2.1.3 Evaluations and Conclusions p. 37

5.3.2.2 CN node change by handover p. 37

5.3.2.2.1 Scenario Description p. 37

5.3.2.2.2 Solutions p. 37

5.3.2.2.3 Evaluations and Conclusions p. 37

5.3.3 HSS-initiated Dedicated CN Node Reselection p. 38

5.3.3.1 Scenario Description p. 38

5.3.3.2 Solutions p. 38

5.3.3.3 Evaluations and Conclusions p. 38

5.4 Other procedures p. 38

6 Conclusions p. 38

$ Change History p. 39