top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

why SGI interface is required between PGW and AAA if S6b interface is already available.

+1 vote
1,674 views

PGW is connected with AAA server with 2 interface .
1. SGI interface 2. S6b interface.

Why SGI is required if s6b is already there?

posted Apr 14, 2016 by Rakesh Kumar Suman

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

S6B is between PGW and AAA, it is diameter based interface, where as SGi interface connects the PGW to a external network i.e. PDN. So both are serving different needs.

I hope I understood your query correctly.

answer Apr 14, 2016 by Salil Agrawal
I read some where, SGI is also connected between PGW and AAA. S6B is also between PGW and AAA.
What is the specific purpose for this two interface.
commented Apr 14, 2016 by Rakesh Kumar Suman
Hello Rakesh, As Salil mentioned above SGi interface is between PGW and external IP network while S6B is interface between PGW and AAA server. S6B interface comes into picture when UE connected to LTE network moves to non-3GPP access like wifi PGW authenticates the UE by using the AAA server.
commented Apr 14, 2016 by Vimal Kumar Mishra
One is 3gpp one is not
commented Dec 22, 2017 by anonymous
Similar Questions
+1 vote
Why Diameter server(AAA) is needed for authentication - authorizaion messages AAR , AAA, ACR, ACA messages

Why Diameter server(AAA) is needed for authentication - authorizaion messages AAR , AAA, ACR, ACA messages in order to authenticate if authentication/security is done at MME/eNB/HSS while attach.? Could you please explain in detail?

+6 votes
Authentication at HSS and AAA

HSS can do authentication then why we go for AAA server ?

+2 votes
How sessions between PGW and PCRF is maintained in LTE network?

This regarding the sessions b/w the PGW and PCRF.

Lets say we have 2 default bearers(DEF1, ad DEF2) for UE1, and 2 dediicated bearers for each of these Default bearers. And for UE2 assume 2 def bearers, DEF3, and DEF4.

Now a CCR is sent for initial default bearer DEF1 creation for UE1. Lets say session(session1) is created for this. with CCRequest number=0.
For Ded bearer1 creation, will it use the same session Id ? and increment the CCRNumber ?
What about the UE2?

I am new to Diameter and earlier, these things were internal and didnot need diameter interface. So the questions are arising.

...