Diameter Interfaces in LTE (EPC)

Evolved Packet Core majorly have 5 nodes.
1) Mobility Management Entity (MME)
2) Home Subscriber Server (HSS) 
3) Serving Gateway (S-GW)
4) PDN Gateway (P-GW)
5) Policy and Charging control entity/Function (PCRF)

 These nodes interact then uses diameter based interfaces.

Dark Lines shows the major Diameter Interfaces in EPC.
Some times CSS data is not stored at HSS then S7a interface is used to communicated with MME. S7a is also diameter based interface

13 comments:

  1. UnknownFebruary 17, 2016 at 5:00 PM

    Gx, Rx interface use diameter but you have not highlighted them, Why??

    ReplyDelete
    Replies
    1. Team-DiameterFebruary 18, 2016 at 12:29 PM

      Hi Nissar

      You are right.

      Thanks for your suggestion.
      Team-Diameter

      Delete
  2. UnknownFebruary 24, 2016 at 4:49 PM

    I had one more doubt- EIR doesn't support diameter based s13/s13' directly right? It needs the Interworking functionality of a DRA to translate it to Gf interface?

    ReplyDelete
    Replies
    1. Team-DiameterFebruary 26, 2016 at 11:27 AM

      Dear Nissar Ali

      Following link shall help you.
      http://diameter-protocol.blogspot.in/2013/08/s13s13.html

      Thanks for your query.
      Happy to help you again.
      Team-Diameter

      Delete
  3. sayan3110March 1, 2016 at 4:09 PM

    Hi All,

    Does anyone have any info on a free PCRF product I can use?

    ReplyDelete
  4. UnknownNovember 16, 2016 at 1:24 PM

    Hello all,
    Can some one help me to know the AVPs to consider for the VoLTE charging? Which all AVPs inside the Service-Information and PS-Information and IMS-Information AVPs of Ro interface?

    ReplyDelete
  5. UnknownNovember 16, 2016 at 1:47 PM

    Hello all,
    As there will be usage traffic from PGW as well as IMS side(either from SCSCF or AS), to charge for VoLTE which traffic to consider and can some one help me to know which all AVPs to consider for the charging and how to know which service have been used (like if call forwarding, call hold, call wait etc) happens while making the VoLTE call..how to know and how to charge it accordingly?

    ReplyDelete
  6. UnknownJune 19, 2017 at 3:43 PM

    What is the difference between Diameter as a client and Diameter as a server?

    Till now I have installed and run freediameter. CER and CEA messages are exchanged between client and server successfully. But I am unable to grasp what makes one of the instance run every time as "client" and the other as "server" since both the client and server instance consists of the same source code. Is it dependent on the "diameter identity" or value of "ip" or by the action of a certain "flag" or "command line arguments"? I want my current client instance to run as a server and the current server instance to run as a client but I am unable to do so.

    ReplyDelete
    Replies
    1. Dinesh KumarJune 20, 2017 at 10:49 AM

      There is no different specification for Client or Server.
      Node that initiate Request Message shall act as Client, Node that give Response to the received message shall act as a Server.

      A node can be acting as a server and client at the same time.
      In RCF 6733 you can also check the prefix I and prefix R for the same.

      Thanks for your query.

      Delete
  7. UnknownMarch 10, 2018 at 1:01 PM

    Thanks for making 3GPP TS description very easy. Please find list of all Diameter interfaces defined by 3GPP, IETF and ETSI for LTE based network architecture with link pointing to 3GPP Technical Specification document. https://www.packetforce.in/diameter-interfaces.htm

    ReplyDelete
  8. AvinashApril 14, 2018 at 2:41 PM

    This comment has been removed by the author.

    ReplyDelete
  9. AvinashApril 14, 2018 at 2:43 PM

    In diameter Gy interface is it optional to have sub AVP inside trigger AVP. Trigger AVP is part of MSCC AVP. If child AVP of trigger AVP (1264) are optional how we can make it as generic in our code to skip length check after decoding it's header.

    ReplyDelete
  10. elronNovember 14, 2018 at 8:29 PM

    Is there any 3GPP specification for IMEI check in VoLTE network? I mean IMEI check triggered by IMS elements

    ReplyDelete

Subscribe to: Post Comments (Atom)