5G Core Components
A Access + mobility control (authentication, registration, mobility) function.
AMF
What NAS functionality does the AMF use?
Mobility Management
What NAS functionality is used by the SMF
Session Management
What does UPF stand for
User plane function
How long does the UE stay in idle/DRX mode before paging is initiated
1.28 seconds (DRX - discontinued reception)
Session management (IP address, QoS, PDU sessions)
SMF
What is RRC
resource radio control
What is a PDU
Protocol data unit (payload). The SMF is responsible for establishing, modifying, and releasing PDU sessions.
Reference point between the (R)AN and the UPF
The N3 interface
IS RRC layer 1, 2, or 3 protocol
Layer 3 RRC NAS
Layer 1 is physicalTransport
Layer 2 is RLC MAC and PDCP
User-plane data forwarding
UPF
UE-AMF signaling interface for NAS messages
What is the N1 interface
What is the name of the initial request from the UE to access the AMF/SMF for the payload
PDU Session Establishment Request
How many UPFs does Comcast have
Chicago, New Castle, Atlanta
What is ERAB
Is enhanced radio access bearer (payload)
Subscriber data management
UDM
RAN-AMF interface for control plane signaling
What is the N2 interface
SMF interacts with what other core components
AMF, UPF, UDM, and PCF
The interface used by the UPF and the AMF
The N3 interface
What are the 3 stages of the access capability KPI
RRC establishment, NAS establishent , and ERAB
Authentication server
AUSF
MME is what function of the AMF
What is mobility management entity
What is the PCF function
The SMF interacts with the Policy Control Function (PCF) to receive and implement policy and charging rules
What is the meaning of DNN
Data network name - for the access points to the external components such as operator services or internet access
What is PCCH doing for the UE
It is a logical channel used to deliver paging messages from the network to User Equipment (UE), enabling the device to be notified of incoming calls, messages, or other services while in idle mode