Page 1386 - 5G Basics - Core Network Aspects

3 Signalling aspects

Meanings and explanations:

1) Service-Platform-Id uniquely specifies the service platform;
2) BNG-Id uniquely specifies the BNG element;
3) Configuration-Type-Id uniquely specifies the type of each configuration within this C-REQ
message;
4) Configuration-Value is a length variable field. This field contains the parameters for the
configuration specified by the Configuration-Type-Id. If multiple configuration parameters are
needed, the configuration value field is organized as type length values (TLVs). The TLVs are highly
configuration type and content dependent.

7.2.2.2 Configuration response message
The configuration response message is defined as the C-RSP message.
The configuration message follows the C-REQ/C-RSP message mode, and the C-RSP message is optional.

By default, the BNG sends the C-RSP message to the service platform. The service platform can use the C-
REQ message to set the BNG to send the C-RSP messages or not.

The C-RSP message, indicated by the message type in the message header field, is sent by the BNG to the
service platform to indicate whether this configuration is enforced to the BNG correctly or not.
Message format:
< C-RSP-Message > ::= < Message Header >
{ Service-Platform-Id }
{ BNG-Id }
*{ Configuration-Type-Id }
*{ Configuration-Result }

Meanings and explanations:
1) Service-Platform-Id uniquely specifies the service platform;
2) BNG-Id uniquely specifies the BNG element;
3) Configuration-Type-Id uniquely specifies the type of each configuration within this C-REQ
message;
4) Configuration-Result is used to indicate the configuration result for the C-REQ message, which
is specified by the other parameters in this message.

7.3 BNG resources, event and status notification to the service platform
The resources, events, status, network service status, etc. may need to be reported to the service platform.

Scenarios and requirements of BNG event and status notification to the service platform have been stressed
in Annex C. As stated in Annex C, the three main types of events or statuses, such as resource notifications,
failure or faults notifications, and statistics notifications should be reported to the service platform.

7.3.1 Message types
The network application or the service platform may need to know the resources in the BNG element. The
enquiry of the BNG's resources is processed in the request and response mode. The service platform sends
the resource status request (RS-REQ) message to the BNG and the BNG responds with the resource status
response (RS-RSP) message.

In some cases, resource notifications or resource changes should be sent to the service platform
automatically by the BNG. The RS-REQ message is used to indicate the resources to be automatically notified
to the service platform. The BNG sends the automatic resource status response (A-RS-RSP) message to the
service platform for the automatic resource notifications.
The three messages are illustrated in Figure 5.

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