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TR 29.844 (CT4)
Study on Control and User Plane Separation of EPC Nodes

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(W-zip) V14.0.0    2017/06    52 p.


Rapporteur:  Mr. Schmitt, Peter
See also:  CUPS-related TS/TR    


The present document analyses the aspects with regard to the new interface between Control Plane and User Plane due to the separation of the following EPC nodes: S-GW, P-GW and TDF. Specifically, the following aspects are to be analysed:
  • Restoration procedure enhancements for the separated nodes;
  • Signalling with regards to Load control;
  • Signalling with regards to Overload control;
  • Path management and path failure handling.


 

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1   Scope   Word-p. 7
2   References
3   Definitions, symbols and abbreviations
4   Architecture and requirements
5   Restoration   Word-p. 9
5.1   Introduction
5.2   Solutions for SGW-C failure with and without restart
5.3   Solutions for SGW-U failure with and without restart
5.4   Solutions for PGW-C failure with and without restart
5.5   Solutions for PGW-U failure with and without restart
5.6   Solutions for TDF-C failure with and without restart   Word-p. 30
5.7   Solutions for TDF-U failure with and without restart   Word-p. 32
5.8   Detection of a PFCP entity restart
5.9   Solutions for SGW-C partial failure   Word-p. 36      Up
5.10   Solutions for PGW-C partial failure   Word-p. 38
5.11   Solutions for SGW-U partial failure   Word-p. 40      Up
5.12   Solutions for PGW-U partial failure
5.13   Evaluation and conclusion      Up

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