Gx Interface Support
▀ Rel. 7 Gx Interface
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
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Policy Enforcement for Authorized QoS Per SDF: If an authorized QoS is defined for a PCC rule, the
PCEF limits the data rate of the SDF corresponding to that PCC rule not to exceed the maximum
authorized bandwidth for the PCC rule by discarding packets exceeding the limit.
Upon deactivation or removal of a PCC rule, the PCEF frees the resources reserved for that PCC rule. If
the PCRF provides authorized QoS for both the IP-CAN bearer and PCC rule(s), the enforcement of
authorized QoS of the individual PCC rules takes place first.
Important:
In this release, coordination of authorized QoS scopes in mixed mode (BCM = UE_NW) is not
supported.
Provisioning of Authorized QoS Per QCI: If the PCEF performs the bearer binding, the PCRF may
provision an authorized QoS per QCI for non-GBR bearer QCI values. If the PCRF performs the
bearer binding the PCRF does not provision an authorized QoS per QCI. The PCRF does not
provision an authorized QoS per QCI for GBR bearer QCI values.
Policy Enforcement for Authorized QoS per QCI: The PCEF can receive an authorized QoS per QCI
for non GBR-bearer QCI values.
Other Features:
Bearer Control Mode Selection: The PCEF may indicate, via the Gx reference point, a request for
Bearer Control Mode (BCM) selection at IP-CAN session establishment or IP-CAN session
modification (as a consequence of an SGSN change). It will be done using the “PCC Rule Request”
procedure.
If the Bearer-Control-Mode AVP is not received from PCRF, the IP-CAN session is not terminated.
The value negotiated between UE/SGSN/GGSN is considered as the BCM. The following values are
considered for each of the service types:
GGSN: The negotiated value between UE/SGSN/GGSN is considered.
In the following scenarios UE_ONLY is chosen as the BCM:
Scenario 1:
UE-> UE_ONLY
SGSN-> UE_ONLY
GGSN-> UE_ONLY
PCRF-> NO BCM
Scenario 2:
UE-> UE_ONLY
SGSN-> UE_ONLY
GGSN-> Mixed
PCRF-> NO BCM
GTP-PGW: BCM of UE_NW is considered.
IPSG: BCM of UE_ONLY is considered.
HSGW/SGW/PDIF/FA/PDSN/HA/MIPV6HA: BCM of NONE is considered.
PCC Rule Error Handling: If the installation/activation of one or more PCC rules fails, the PCEF
includes one or more Charging-Rule-Report AVP(s) in either a CCR or an RAA command for the
affected PCC rules. Within each Charging-Rule-Report AVP, the PCEF identifies the failed PCC