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TR 24.802 (CT3)
Indication of Network to Network Interface (NNI) routeing scenarios in SIP requests in the IMS

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(W-zip) V12.1.0    2014/06    64 p.

Rapporteur:  Mr. Holm, Jan
See also:  TS 24.139    

This TR provides a study of the IMS impacts for providing a solution for determination of Inter-IMS Network to Network Interface (II-NNI) traversal scenario type. The document describes and analyses different II-NNI traversal scenarios. The present document describes requirements and investigates the implementation options to fulfil requirements for determination of II-NNI traversal scenario type.

Examples of scenarios to study are:
  • the visited to home scenario;
  • the home to visited scenario;
  • the loopback scenario;
  • the invocation of MRB/MRF in visited network from an AS in home network scenario; and
  • a request sent from the home network on the originating side to the home network on the terminating side.
This TR includes the study of the existing protocol mechanism and new protocol mechanism for further evaluation what is needed to identify a particular II-NNI traversal scenario type. The study also considers existing deployments.

The document analyses and evaluates different solutions.


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1   Scope   Word-p. 6
2   References
3   Definitions, symbols and abbreviations   Word-p. 7
4   Scenarios   Word-p. 8
4.1   Introduction
4.2   Roaming user on the originating side II-NNI traversal scenario types   Word-p. 9
4.3   Signalling between originating home and terminating home side II-NNI traversal scenario types
4.4   Roaming user on the terminating side II-NNI traversal scenario types
4.5   Usages of information on II-NNI traversal scenario types
4.6   Summary of identified issues
5   Requirements
6   Charging considerations
7   Possible solutions
8   Other interfaces that requires identification
9   Conclusion
A   Determine II-NNI traversal scenario type   Word-p. 52
B   Requirement for an explicit indication of the II-NNI traversal scenario type   Word-p. 60
C   Change history   Word-p. 64

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