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TR 29.806 (CT4)
Study on IMS
Proxy Call Session Control Function (P-CSCF)
Restoration Procedures

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Rapporteur:  Ms. Bartolome, Maria-Cruz

The present document analyses existing P-CSCF restoration mechanism limitations and drawbacks, as defined by TS 23.380 and TS 24.229, and proposes alternative solutions that could minimize such limitations.

Expected output from this document is a proposal of an enhanced P-CSCF restoration mechanism.

full Table of Contents for  TR 29.806  Word version:   12.1.0

 

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1  ScopeWord-p. 7
2  References
3  Abbreviations
4  Existing restoration proceduresWord-p. 8
5  ObjectivesWord-p. 15
6  Solution alternativesWord-p. 16
6.1  IntroductionUp
6.2  Sol-A: Double IMS registration
6.3  Sol-B: Alternative P-CSCF and PCRF based restoration
6.4  Sol-C: Alternative with AS (via ISC and Sh)
6.5  Sol-D: Alternative with direct Cx communicationWord-p. 32
6.6  P-CSCF restart caseWord-p. 43
7  ConclusionsWord-p. 45
A  Solution D extension for non-3GPP accessWord-p. 58
B  Change historyWord-p. 61

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