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TR 29.811 (CT4)
Study on EPC
Signalling Improvements
for Race Scenarios

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V13.0.0 (Wzip)  2015/12  33 p.


Rapporteur:  Mr. Schmitt, Peter

The present document analyses various EPC race conditions scenarios and scenarios with hanging session or bearer contexts in EPC nodes, and assesses whether to improve the existing protocols and/or specifications for effective handling of these scenarios. The specification updates, if needed, may consist in EPC (GTP-C, PMIP and/or Diameter) signalling improvements, recommendations on how to minimize the occurrences of the issues, and/or clarifications on how the EPC nodes should behave in these scenarios.

full Table of Contents for  TR 29.811  Word version:   13.0.0

 

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1  ScopeWord-p. 5
2  References
3  Definitions, symbols and abbreviationsWord-p. 6
4  EPC race conditions scenarios and scenarios with hanging session/bearer contexts
5  Possible solutions for effective handling of EPC race conditions scenarios and scenarios with hanging session/bearer contextsWord-p. 14
5.1  Introduction
5.2  Solutions for scenario 1 - Create Session Request at SGW colliding with an existing PDN connection context
5.3  Solutions for scenario 2 - Hanging IP-CAN session context in PCRFWord-p. 17
5.4  Solutions for scenario 3 - Overlapping transactions in the network
5.5  Solutions for scenario 4 - Hanging session context in 3GPP AAA Server
6  Conclusions and recommendations
A  Change historyWord-p. 33

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