Page 52 - ITU-T Focus Group IMT-2020 Deliverables

2 ITU-T Focus Group IMT-2020 Deliverables

PCRF (Policy and Charging Rule Function)

• Provides dynamic policies rules to CP network functions for QoS enforcement, charging control,
traffic routing, etc.

QSCF (QoS Control Function)
• Enables E2E QoS in proper granularity (e.g., per UE, per flow, or per PDU session) with QoS
parameters (e.g., maximum bit rate, guaranteed bit rate, priority level, etc.).
• Controls user plane network functions for the QoS enforcement.
6.2.3.2 Data plane network functions

Data plane network functions support operations such as forwarding to other user plane functions /control
plane functions, processing transport traffic, performing user plane gateway functions, etc. Multiple user
plane functions per session can be activated and configured by the control plane (e.g., SMCF) as needed for
a given service.
UPGW (User Plane Gateway function)
• Access/Trunking media gateway functionality which provides interworking between the IP-based
transport and non-IP based access.
• Terminating User Plane Function (TUPF)
• Session anchor to provide IP and non-IP PDU session (e.g., IP anchor, tunnelling, etc.)

• Access border gateway functionality between an access network and a core network
• Interconnection border gateway functionality between transport networks in different domains
• Packet routing & forwarding
• Traffic handling (e.g., QoS enforcement)
• Optional functionalities such as Packet inspection, Lawful intercept (UP collection), etc.

6.3 Functional entities

NOTE – Plans are for the functional entities to be developed by the ITU-T Study Group 13 in 2017-2018.

6.4 Reference points
NOTE – Plans are for the Reference points to be developed by the ITU-T Study Group 13 in 2017-2018.

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