Page 1398 - 5G Basics - Core Network Aspects

3 Signalling aspects

D.2.1 Signalling requirements for user information report

The BNG can provide the functions of user traffic analysis, service detection and dynamic control through the
interface between the BNG and the service platform. When the user finishes the dial-up process, the BNG
will report the user identification information to the service platform. Then the service platform will
distribute the initial control policy for that user to the BNG. The BNG will allocate the appropriate resources
for the user and perform control.

For user information reports, the BNG usually needs to report BNG information and user identification
information for BNG and user network information to the service platform:
1) The BNG information could include address information and BNG ID, which can be used to find the
BNG by the service platform when it distributes the control policy;

2) The user network information is used to identify the user in the network. The user network
information is known to the service/application. When the service/application wants to request
policy control for a user, the service/application will send the user network information to the
service platform, and the service platform will acquire the user identification information according
to the user network information;

3) The user identification information for the BNG is used for policy control. The service platform will
distribute the control policy with the user identification information to the BNG, then the BNG will
perform control according to the user identification information.
The user network information could include:

1) user IP address or sub-network information;
2) public IP address and port range of NAT;
3) layer 2 information, e.g., MAC address;
4) user VPN information.
The user identification information could include:

1) user accounting ID information;
2) user IP address or sub-network information;
3) layer 2 information, e.g., MAC address;
4) user layer 2 or layer 3 VPN information;
5) user ID generated by BNG.

Most user network information and user identification information can be supported by current policy
distribution protocols (e.g., RADIUS, Diameter, common open policy service (COPS)). However, some
information might need to be supported by extending current protocols.

The following user related information could be considered to be included in the user information report
from BNG to the service platform:
• user network information;

• user identification information (for BNG);
• BNG address information and BNG ID.
D.2.2 Requirements for traffic statistics and BNG capability reporting

The reported information should support accounting for users. The service platform and BNG should support
the generation of accounting information and interact with authentication, authorization and accounting
(AAA) servers through RADIUS or Diameter protocols. Accounting information can be generated based on
user traffic volume or online time. The BNG needs to monitor the available traffic volume or online time for
users. The service platform and the BNG also need to support smart accounting functions, e.g., accounting
according to QoS policy, application type, destination address, busy/idle time, and content type.

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