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LTE: Modify bearer Cmd message can be triggered but not Delete bearer Cmd from ePDG to PGW why ?

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LTE: Modify bearer Cmd message can be triggered but not Delete bearer Cmd from ePDG to PGW why ?
posted Jan 8, 2014 by Harshita

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+3 votes

While going through 29.274 specification, I observed "Bearer TFT" is optional in Create Session Request/Response messages while it's presence is mandatory in Create Bearer Request message. Reasons are not explained in the specification. Can someone please explain it ?

0 votes

As per LTE core network architecture, MME shares S11 interface with SGW and SGW has S5/S8 interface with PGW.
I went through Create Session Response message sent by SGW to MME and found PGW-C and PGW-U tunnel ids.
I want to know what MME does with these PGW-C and PGW-U tunnel Ids ?

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