Dynamic and Predefined Rule Support
Dynamic Rule
This feature supports the dynamic rule installation for SMF by using the “Charging Rule Definition” AVP. See Gx Initial Attach and Detach Support for the list of AVPs supported as part of Charging-Rule-Definition.
Note | The dynamic rule installation support is only available on default bearer in the current release. |
Predefined Rule
This feature supports the predefined rule (Charging Rule Name) installation for SMF using the “Charging Rule Name” AVP.
Note | The predefined rule installation support is only available on default bearer in the current release. |
Charging Rule Base Name (CRBN)
When PCEF receives the “Charging-Rule-Base-Name” AVP from PCRF, it treats the AVP as an ECS rulebase or installation of group of ruledef. This behavior depends on the CLI present in the active charging service configuration.
config
active-charging service service_name
policy-control charging-rule-base-name gor
end
Note | By default, the “Charging-Rule-Base-Name” AVP is the ECS rulebase for the call. |
N4 Support for Initial Attach/Detach
User-Plane and Control-Plane combined together provide the functionality of a node for other elements in the EPC network. SMF supports the N4 interface towards UP.
-
Initial Attach Support (N4 Session Establishment Request):
SMF supports sending the necessary PDR, FAR, QER, URR for the dynamic rule and predefined rules.
This support is only applicable for the default bearer in the N4 Establishment Request towards the UPF.
This functionality also supports the sending of rulebase PDR, Default Qos, APN-AMBR values to the UPF.
-
Detach Support (N4 Session Deletion Request):
SMF supports sending the N4 session deletion request as part of the detach procedure.
Subscription-ID as Part of CCR towards PCRF
The following CLI controls the Subscription ID value for the CCR messages from SMF to PCRF. The default value is none.
Configuration option is available in the access profile as follows.
config
profile network-element network_element_name
subscription-id id_number
description id_description
possible completions { e164 | imsi | nai }
end
Online and Offline AVP
The online and offline AVP value that is sent to PCRF in the CCR – Initial Request message is controlled in the following ways:
-
Online AVP to be sent in CCR-I to PCRF: When the network-profile-element OCS is configured and if any one of the configured rulebase’s static rules charging action contains
cca charging-credit
CLI, then the online AVP to PCRF is sent as ENABLE_ONLINE, else it is sent as DISABLE_ONLINE. -
Offline AVP to be sent in CCR-I to PCRF: When the network-profile-element OFCS is configured and the configured rulebase has
billing-action egcdr
CLI configured, then the offline AVP to PCRF is sent as ENABLE_OFFLINE, else it is sent as DISABLE_OFFLINE.
Predefined Group-of-Ruledef installation through Charging-Rule-Name AVP
This feature supports the installation of the predefined group-of-ruledef using the charging-rule-name installation from PCRF. This is a default feature and requires no configuration.