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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The RFC defines a core state machine for maintaining connections between peers and processing messages. An administrative domain MAY act as a local realm for certain users, while being a home realm for others. The Command Codes are as follows: It is located in the home domain and is accessed by service elements or Diameter AAA servers in.

Information on RFC ยป RFC Editor

The application can be an authentication application, an accounting application or a vendor specific application. When set the AVP Code belongs to the specific vendor code address protodol. When combined with the Vendor ID the attribute is uniquely identified.

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. In some cases it dixmeter 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.


Additionally, application specific state machines can be introduced either later or at a higher abstraction layer.

Diameter (protocol)

In addition, it is necessary to check that the end user’s account provides coverage for diameetr requested service prior to initiation of that service. Note that credit resources may not imply actual monetary credit; credit resources may be granted to the credit control client in the form of units e.

Diameter Relay and redirect agents must not reject messages with unrecognized AVPs.

Service specific authorization and authentication is out of the scope. The scope of this specification is the credit authorization. The credit-control application defined in this specification supports two different credit authorization models: The credit- control protocol is the Diameter base protocol with the Diameter credit-control application.

This field indicates the version of the Diameter Base Protocol. Diameter is an authentication, authorization, and accounting protocol for computer networks. The originator of an Answer message MUST ensure that the field contains the same value that was found in the corresponding request.

The intermediate interrogations may be needed to request new quota while the service is being rendered. Also, Diameter Redirect agents that refer credit-control clients to credit-control servers and allow them to communicate directly can exist.

Viameter a new optional AVP does not require a new application.


When real-time credit-control is required, the credit-control client contacts the credit-control server with information protcool a possible service event. Rating The act of determining the cost of the service event. A mechanism has to be provided to allow the user to be informed of the charges to be levied for a requested service.

This process is accomplished with the one-time event.

RFC – part 1 of 5

Internet Standards Application layer protocols ;rotocol access control protocols Authentication protocols. Views Read Edit View history. Diameter is used for many different interfaces defined by the 3GPP standards, with each interface typically defining new commands and attributes.

Some common Diameter commands defined in the protocol base and applications are:. It is used between the credit-control server and the Diameter credit-control client to acknowledge a Credit- Control-Request command. The credit-control application, therefore, does not define AVPs that could be used as input in the rating process. Credit-control is a process of checking whether credit is available, credit-reservation, deduction of credit from the end user account when service is completed and refunding of reserved credit that is not xiameter.

The application can be an authentication application, an accounting application, or a vendor-specific application.