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LTE: Why does "UE Time Zone IE" send from MME to PGW via SGW ?

+4 votes
LTE: Why does "UE Time Zone IE" send from MME to PGW via SGW ?
posted Feb 23, 2014 by Ganesh Kumar

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2 Answers

+2 votes

operator will do performance analysis by received UE Time Zone/ULI in CDR's (on Rf/Ro interface). Hence MME will send UE time zone value to SGW and PGW. if SGW/PGW will generate CDR(Charging Data Record) then SGW/PGW should include UE Time Zone value in this CDR and send it to offline/online charging, whenever time zone changes, then MME will inform this change to SGW/PGW on next S11&S5S8 message.

answer Jun 27, 2018 by Althi Rajeswararao
0 votes

Question is not clear, but if I got it then it's very simple.

Because there is no other way. Check how the network is built.

answer Mar 20, 2014 by Bart Barton
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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 ?