Gx Interface Support
Rel. 7 Gx Interface ▀
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
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On partial failure, i.e. , when two or more rules are installed and at least one of the rules were
successfully installed. (and the event trigger is armed by PCRF and resource-allocation-
notification is enabled).
On complete failure, i.e., none of the rules were installed, the event-trigger
SUCCESSFUL_RESOURCE_ALLOCATION ( 22 ) will not be sent.
Important:
In this release, event triggers “IP-CAN_CHANGE” and
“MAX_NR_BEARERS_REACHED” are not supported.
QoS Control:
QoS control is the authorization and enforcement of the maximum QoS that is authorized for a
SDF or an IP-CAN bearer or a QoS Class Identifier (QCI). In case of an aggregation of multiple SDFs (for
GPRS a PDP context), the combination of the authorized QoS information of the individual SDFs is provided
as the authorized QoS for this aggregate.
QoS control per SDF allows the PCC architecture to provide the PCEF with the authorized QoS to be
enforced for each specific SDF.
The enforcement of the authorized QoS of the IP-CAN bearer may lead to a downgrading or upgrading
of the requested bearer QoS by the Gateway (PCEF) as part of a UE-initiated IP-CAN bearer
establishment or modification. Alternatively, the enforcement of the authorized QoS may, depending
on operator policy and network capabilities, lead to network-initiated IP-CAN bearer establishment or
modification. 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.
QoS authorization information may be dynamically provisioned by the PCRF, or it can be a predefined
PCC rule in the PCEF. In case the PCRF provides PCC rules dynamically, authorized QoS
information for the IP-CAN bearer (combined QoS) may be provided. For a predefined PCC rule
within the PCEF, the authorized QoS information takes affect when the PCC rule is activated. The
PCEF combines the different sets of authorized QoS information, that is the information received
from the PCRF and the information corresponding to the predefined PCC rules. The PCRF knows the
authorized QoS information of the predefined PCC rules and takes this information into account when
activating them. This ensures that the combined authorized QoS of a set of PCC rules that are
activated by the PCRF is within the limitations given by the subscription and operator policies
regardless of whether these PCC rules are dynamically provided, predefined, or both.
Important:
In this release, QoS Resource Reservation is not supported.
Supported Features:
Provisioning and Policy Enforcement of Authorized QoS: The PCRF may provide authorized QoS to the PCEF.
The authorized QoS provides appropriate values for resources to be enforced.
Provisioning of “Authorized QoS” Per IP CAN Bearer: The authorized QoS per IP-CAN bearer is used if the
bearer binding is performed by the PCRF.
Policy Enforcement for “Authorized QoS” per IP CAN Bearer: The PCEF is responsible for enforcing the
policy-based authorization, that is to ensure that the requested QoS is in-line with the “Authorized QoS” per IP
CAN Bearer.
Policy Provisioning for Authorized QoS Per SDF: The provisioning of authorized QoS per SDF is a part of PCC
rule provisioning procedure.
