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LTE: How does MME select PGW for a PDN connectivity request receives from an UE ?

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LTE: How does MME select PGW for a PDN connectivity request receives from an UE ?
posted Dec 20, 2017 by Ganesh

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1 Answer

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MME will have static IP list for each PDN, MME will pick default PDN if UE doesn't give anything otherwise it picks the PDN which UE includes.

answer Dec 20, 2017 by Jaganathan
Are you sure, carrier grade MME maintain such kind of static details ?
:) This is implementation specif, this is how we maintain :)
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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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