最新IR88 GMSA LTE 4G漫游指导标准V8.0

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LTE Roaming Guidelines

Table of Contents

1        Introduction.. 4

1.1        Overview.. 4

1.2        Scope. 4

1.3        Definition of Terms. 4

1.4        Document Cross-References. 5

2        Architecture. 6

2.1        Architecture Models. 6

2.2        Interfaces. 7

2.3        Features. 8

2.3.1.  SGs Interface for CS Fallback and SMS over SGs. 8

3        Technical Requirements and Recommendations for Interfaces. 8

3.1        General requirements for Inter-PMN interfaces. 8

3.1.1   Inter-PMN IP backbone network requirements. 8

3.1.2   Stream Control Transmission Protocol (SCTP) 8

3.1.2.1      Introduction. 8

3.1.2.2      SCTP Parameters. 9

3.1.3   Diameter 10

3.1.3.1      Introduction. 10

3.1.3.2      Diameter Agents. 10

3.1.3.3      End to End Diameter Architecture. 11

3.1.3.4      Diameter Routing. 13

3.1.3.5      Diameter Transport Parameter 13

3.1.3.6      Notification of ME Identity. 13

3.2        S8 Interface. 14

3.2.1   Procedures. 14

3.2.1.1      General 14

3.2.1.2      SGW Selection. 14

3.2.1.3      PGW Selection. 15

3.2.1.4      Combined SGW/PGW Selection. 15

3.2.2   GTP.. 16

3.2.3   PMIP.. 16

3.2.4   PMIP-GTP Interworking. 16

3.3        S9 Interface. 16

3.3.1   S9 implementation requirements. 16

3.3.2   Guidelines for Diameter interface over S9 interface. 16

3.4        S6a and S6d interface. 16

4        Technical Requirements and Recommendations for Legacy Interworking and Coexistence  17

4.1        Legacy Interworking scenarios. 17

4.1.1   Introduction. 17

4.1.2   VPMN has not implemented LTE.. 17

4.1.3   HPMN has not implemented LTE.. 18

4.2        Co-existence scenarios. 19

4.2.1   Introduction. 19

4.2.2   Possible scenarios. 19

4.2.2.1     2G/3G Roaming Agreement Only. 19

4.2.2.2      2G/3G and LTE Roaming Agreement 21

4.3        Inter-RAT Handover 23

4.3.1 Handover to/from 2G/3G and LTE.. 23

4.3.2   Handover to/from non-3GPP accesses and LTE.. 23

5        Technical Requirements and Recommendations for Services. 23

5.1        Short Message Service (SMS) 23

5.1.1    SMS over SGs. 23

5.2        Voice. 24

5.2.1 CS Fallback. 24

5.2.1.1      General 24

5.2.1.2     Roaming Retry for CSFB procedure. 25

5.2.2   LTE Voice Roaming Architecture. 26

6        Other Technical Requirements and Recommendations. 27

6.1       Access Control 27

6.1.1   Access Control in the VPMN.. 27

6.1.2   Access Control in the HPMN.. 27

6.1.3   Access Control in the VPMN for CS Fallback. 27

6.2        Addressing. 28

6.2.1   UE Addressing. 28

6.2.1.1      SS7. 28

6.2.1.2      IP.. 28

6.2.2   Network Element Addressing. 29

6.2.2.1      IP and SS7. 29

6.2.2.2      Fully Qualified Domain Names (FQDNs) 29

6.2.2.3      Diameter Realms. 29

6.3        APN for IMS based services. 29

6.3.1   Introduction. 29

6.3.2   Definition of the IMS well-known APN.. 30

6.3.3   Gateway Selection. 30

6.3.4   Disconnect the PDN connection to the IMS APN.. 30

6.3.5   APN for XCAP/Ut 30

6.4        Emergency PDN connection.. 31

6.5        Security. 31

6.5.1   Diameter Security. 32

6.6        Hubbing. 34

7        Technical Requirements for Dynamic Policy and Charging Control 34

7.1        Home Routed architecture and S8 protocol is GTP.. 34

7.2        Home Routed architecture and S8 protocol is PMIP.. 35

7.3        Local Break Out architecture. 36

Annex A: Testing Framework. 37

Annex B: Diameter Architecture Implementation.. 37

Annex C: Document Management 42

Document History. 42

Other Information.. 44