The Diameter protocol is currently defined in the following IETF RFCs: Obsolete RFCs RFC , Diameter Credit-Control Application. RFC (part 1 of 5): Diameter Credit-Control Application. Please refer to the current edition of the “Internet Official Protocol Standards” (STD 1) for the. IETF RFC “Diameter Credit Control Application”. []. Void. []. IETF RFC , “Private Extensions to the Session Initiation Protocol (SIP) for the 3rd.

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Service specific authorization and authentication is out of the scope. The combination of the Origin-Host and this field is used to detect duplicates. Typical credit-control architecture There can be multiple credit-control servers in the system for redundancy and load balancing.

Hakala Request for Comments: The originator of an 0406 message MUST ensure that the field protofol the same value that was found in the corresponding request. Diameter Credit-control Server A Diameter credit-control server acts as a prepaid server, performing real-time rating and credit-control. It is set when resending requests not yet acknowledged as an indication of a possible duplicate due to a link failure.

The prepaid model has been shown to be very ffc, for instance, in GSM networks, where network operators offering prepaid services have experienced a substantial growth of their customer base and revenues. Hop by Hop ID. The End-to-End Identifier is an unsigned bit integer field in network byte order that is used to detect duplicate messages along with the combination of the Origin-Host AVP.


The first interrogation is used to reserve money from the user’s account and to initiate the process.

The final interrogation is used to exit the process. When set the AVP Code belongs to the specific vendor code address space. These agents transparently support the Diameter credit-control application. The credit-control server deducts the used amount from the end user’s account; it may perform rating and make a new credit reservation if the service delivery is continuing.

A Business Support System is usually deployed; it includes at least the protcol functionality.

Information on RFC ยป RFC Editor

The Diameter protocol requires that relaying and proxying agents maintain transaction state, which is used for failover purposes. If cleared, the message MUST be locally processed.

Pdotocol with this bit set are commonly referred to as error messages.

If set, the message MAY be proxied, relayed or redirected. It is used between the credit-control server and the Diameter credit-control client to acknowledge a Credit- Control-Request command.

Pfotocol, for real-time credit-control, these authorization and accounting models are not sufficient. Internet Standards Application layer protocols Computer access control protocols Authentication protocols. Network access is an example of a service offered in the visited domain where the NAS, through an AAA infrastructure, authenticates and authorizes the user with the user’s home network.

The credit- control protocol is the Diameter base protocol with the Diameter credit-control application.

Upon receipt of a successful credit authorization answer, the credit-control client allows protoclo delivery to the end user. A process through which two Diameter nodes establish end-to-end security.


This field aids in matching requests and replies. Standards Track Ericsson J-P.

Diameter (protocol)

In order to support protocl credit-control, a new type of server is needed in the AAA infrastructure: A host process that implements the Diameter protocol, and acts either as a Client, Agent or Server. The specification of another cooperative standardization body e. Direct Connection with Redirects The Diameter base application needs to be supported by all Diameter implementations.

Therefore, it is assumed that a Diameter credit-control server will provide service only for Diameter credit-control clients that have agreed beforehand as to the content of credit-control messages. Diameter Relay and redirect agents must not reject messages with unrecognized AVPs.

System internal interfaces can exist to relay messages between servers and an account manager. Service-Specific Rating Input and Interoperability The general principles for sending rating parameters are as follows: The credit-control application defined in this specification supports two different credit authorization models: TPotentially retransmitted message.

If set, the message is a request. In some cases it might be possible that the service element in the visited domain can offer services to the end user; however, a commercial agreement must exist between the visited domain and the home domain. It monitors the usage of the granted quota according to instructions returned by credit-control server.