ELABORACION DE INDICADORES

This section provides individual AVP descriptions.

Session-Id AVP (263)

Uniquely identify this session. It is a string value and is delimited by semi-colons.

The second two parts are values that get generated by the signaling application related to the signaling session that is occurring. It is a number that gets increased every time a new signaling session is created. An example of a Session-Id from the SBC is as follows, acmesystem;0;1.

Origin-Host AVP (264)

Contains the account-server configuration element’s hostname parameter followed by the "@" character, followed by the account-server configuration element’s origin-realm parameter. For example:

[email protected].

Origin-Realm AVP (296)

Contains the account server configuration element’s origin-realm and domain-name-suffix

parameters where the server request is sent.

Destination-Realm AVP (283)

Contains the value of the Origin-Realm AVP in the CEA received from the accounting server for this connection.

Destination-Host AVP (293)

Contains the value of the Origin-Host AVP in the CEA received from the accounting server for this connection.

Accounting-Record-Type AVP (480)

Contains the value indicating the type of accounting message being sent. • start record = 2

• interim record = 3 • stop record = 4

If this is an interim-type message, it’s still included in an ACR Start message but with the value of this AVP set to "3".

Accounting-Record-Number AVP (485)

A value that uniquely identifies this message in the session, i.e., a sequence number for this connection. This value is arbitrarily created by the SBC with the caveat that it is unique for a session.

Acct-Application-Id AVP (259)

Set to value "3". This value indicates Diameter-based accounting messages.

User-Name AVP (1)

Contains the account-server configuration element’s hostname parameter followed by the "@" character, followed by the account-server configuration element’s origin-realm parameter. For example: [email protected].

Event-Timestamp AVP (55)

Contains the number of seconds since January 1, 1900 when this accounting event took place.

Event-Type AVP (823)

A grouped AVP containing information about the signaling event. It contains the following AVPs:

• SIP-Method AVP (824)—Contains the exact string payload from the SIP request line; i.e., the Method that triggered the accounting event.

• Content-Type AVP (826)—Contains the exact string payload from the "Content-Type" SIP header of the message that triggered the accounting event.

• Content-Length AVP (827)—Contains the exact string payload from the Content-Length" SIP header of the message that triggered the accounting event.

Role-of-Node AVP (829)

Set to the value 2 which indicates that the SBC is operating in a PROXY role.

User-Session-Id AVP (830)

Contains VSA 44 as used in the RADIUS interface.

Calling-Party-Address AVP (831)

Contains the calling party address in the SIP message. The SBC first checks for a P-Asserted-Id header. If present, its value is used for this AVP. If not present, the SBC inserts the "To:" field from the SIP message into this AVP. ONLY IN ACR Start.

Called-Party-Address AVP (832)

Contains the "From:" field of the SIP message. ONLY IN ACR Start. ®

Time-Stamps AVP (833)

A grouped AVP that contains timestamps for the related SIP signaling. It contains the following AVPs.

• SIP-Request-Timestamp AVP (834)—A UTC formatted timestamp that corresponds to when the SIP INVITE that started the session was received.

• SIP-Response-Timestamp AVP (835)—A UTC formatted timestamp that corresponds to when the SIP 200 OK response to the INVITE that started the session was received.

Inter-Operator-Identifier AVP (838)

A grouped AVP that indicates the ingress and egress networks from the SBC’s perspective. It contains the following AVPs.

• Originating-IOI AVP (839)—The realm where the SBC received the SIP signaling messages. • Terminated-IOI AVP (840)—The realm where the SIP signaling message exit the SBC.

SDP-Session-Description AVP (842)

This AVP may occur multiple times in an ACR message. It is populated with SDP attribute-lines from the SIP messages to which this ACR Stop message refers. Thus, all "i=", "c=", "b=", "k=", "a=", etc.., lines comprise multiple instances of this AVP.

If the SBC is configured to generate Start events on the INVITE, the calling SDP will be used; if the SBC is configured to generate Start events on the OK, the called SDP will be used. ONLY IN ACR Start.

Session-Media-Component AVP (845)

A grouped AVP that contains information about the media session. It contains the following AVPs. ONLY IN ACR Start.

• SDP-Media-Name AVP (844)—populated with the "m=" line from the SDP being used.

• SDP-Media-Description AVP (845)—this AVP may occur multiple times in this grouped AVP. It is populated with SDP attribute-lines from the media component as specified by the media described in the SDP-Media-Name AVP. Thus, all "i=", "c=", "b=", "k=", "a=", etc..., lines related to the above specified "m=" line comprise multiple instances of this AVP.

Cause AVP (860)

A grouped AVP that contains the reason for the termination event and the role/function of the node where the call was terminated. It contains the following AVPs.

• Cause-Code AVP (861)—See Values for Cause Code AVP (861) below. • Node-Functionality AVP (862)—Set to value 0.

Values for Cause Code AVP (861)

As described in 3GPP TS32.229, the Cause-Code AVP 861 includes the cause code value sent by the IMS node. It is used in stop and/or event messages.

If the session terminated as a result of a specific known SIP error code, the SIP error code is used as the cause code value. Otherwise, cause code values less than or equal to 0 are used for successful causes while values greater than or equal to 1 are used for failure causes.

• Cause code value set to 0 — indicates "Normal end of session" and is used in Accounting-request[stop] message to indicate that an ongoing SIP session has been normally released either by the user or by the network (SIP BYE message initiated by the user or initiated by the network has been received by the IMS node after the reception of the SIP ACK message).

• Cause code value set to "2xx Final Response" (except 200) — used when the SIP transaction is terminated due to an IMS node receiving/initiating a 2xx Final response.

• Cause code value set to "2xx Final Redirection"— used when the SIP transaction is terminated due to an IMS node receiving/initiating a 3xx response.

• Cause code value set to "1"— indicates "Unspecified error" and is used when the SIP transaction is terminated due to an unknown error.

• Cause code value set to "4xx Request failure"— used when the SIP transaction is terminated due to an IMS node receiving/initiating a 4xx error response.

• Cause code value set to "5xx Server failure"— used when the SIP transaction is terminated due to an IMS node receiving/initiating a 5xx error response.

• Cause code value set to "6xx Global failure"— used when the SIP transaction is terminated due to an IMS node receiving/initiating a 6xx error response.

• Cause code value set to "Unsuccessful session setup"— used in the Accounting-request[stop] when the SIP session has not been successfully established (i.e. Timer H expires and SIP ACK is not received or SIP BYE is received after reception of the 200OK final response and SIP ACK is not received).

• Cause code value set to "Internal error"— used when the SIP transaction is terminated due to an IMS node internal error (e.g. error in processing a request/response).