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Use of Diameter in LTE technology

+2 votes
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What is the use of Diameter in LTE technology?

posted Apr 12, 2013 by Prem Chaitanya Prathi

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1 Answer

+2 votes

Diameter is used for Authentication, authorization and accounting related interfaces in LTE technologies.

answer Apr 12, 2013 by Salil Agrawal
AAA stands of "Authentication, Authorization and Accounting". In LTE, diameter is used between various nodes to met AAA functionality.
Please find the list of some interfaces:
1. MME <------- S6a-------> HSS.
2. PGW/PCEF <---- Gx------->PCRF.
3. PCRF <----------- Sp-----------> SPR(subscriber profile repository).
4. PCRF <----------- Rx -----------> AF (application function).
5. PCRF <----------- Sy -----------> OCS (online charging system).
6. PGW/PCEF <----------- Gy ------------> OCS.
7. PGW/PCEF <----------- Gz ------------> OFCS(Offline charging system).
Similar Questions
+3 votes

In LTE Gx (Diameter) Interface how would transactions like Re-Auth Req/Ans mapped to IMSI? these transactions don't have Subscription ID and User-Name APN and same thing for other Diameter Interfaces transactions that are missing Subscription ID and User-Name APN.
If you can give me an insight I will greatly appreciated it!

+2 votes

Hello LTE n/w experts,

I have a Query regarding the UpdateLocation Diamter message. I have a issue in the legacy code, where the AVP "Supported-Features" which is optional is not handled. Now when we are testing with different vendor PGW, we are getting the following AVPS
AVP format

 Supported-Features ::=  < AVP Header: 628 10415 >
                         { Vendor-Id (AVP code 266)}
                         { Feature-List-ID (629)}
                         { Feature-List (630)}
                        *[ AVP ]

AVP format

MIP6-Agent-Info ::=  < AVP Header: 486 >
                    *2[ MIP-Home-Agent-Address (334)]
                      [ MIP-Home-Agent-Host (348)]
                      [ MIP6-Home-Link-Prefix (125)]
                     *[ AVP ]
  MIP6-Agent-Info ::=  < AVP Header: 486 >
                    *2[ MIP-Home-Agent-Address (334)]
                      [ MIP-Home-Agent-Host (348)]
                      [ MIP6-Home-Link-Prefix (125)]
                     *[ AVP ]

I am not sure why the Location Update has these new IEs. I am new to network side. So any help in this regard will be greatly appreciated.

+2 votes

Though its a very straight forward question, but none of the place describes the consolidated but crisp list of Diameter Interfaces applicable in LTE. Please help.


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