Page 93 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 3

– Lawful intercept (control part of enforcement of LI)

– NSSF: network slice selection function
NG Core User Plane functions (NG-UP):
– Packet routing & forwarding
– Traffic handling (e.g., QoS enforcement)
– Mobility anchor

– Session anchor
– Packet inspection
– Lawful intercept (UP collection)

NG User Data Management (UDM)
– Store user subscription data, policy data (e.g., on QoS and charging), session/user related context
and state in a unified data layer. Such a unified data layer is to reduce redundant state information
in multiple network functions. It also aims at "stateless" network functions, i.e., state and context
information could be easily relocated and restored to benefit from virtualization.
Capability Exposure Function (CEF)
– Exposure information/capability to the 3rd party and/or UEs in proper manner for efficient service
provision

6.1.1.3.3 Consolidated architecture option 3
(Source: Nokia, Ericsson, Verizon, etc.)

Figure 6.1.1-13 – Non-roaming reference architecture
The 5G Reference Architecture consist of the following functions:
– NG Subscriber Data Management (NG SDM)

– NG Policy Control function (NG PCF)
– NG Core Control functions (NG CCFs)
– NG Core User plane function (NG UPF)
– NG RAN
– NG UE
– Data network, e.g. operator services, Internet access or 3rd party services.

The NG Core Control functions include the following functionality:
– Termination of RAN CP interface
– Termination of NAS
– Access Authentication

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