5G NG-RAN Signalling

The 5G NG-RAN Signalling course offers a complete understanding of all signalling protocols implemented in the NG-RAN. The course presents the 5G architecture with its nodes, interfaces and protocol stacks and describes protocols through functions and and services they provide. The course focuses on the details of the NR interface signalling exchanged between the UE and the network, however the most important aspects of other NG-RAN interfaces are also covered. Most important network procedures, such as signalling connection establishment, registration, service request and handover are discussed and presented on signalling diagrams.

The course is based on the 3GPP Release 15 version September 2018 and it is equipment vendor independent.

Category: 5G
Duration: 4 days

Target audience

The course is addressed to network engineers involved in the network design and optimisation, managerial staff responsible for network operation and anybody who requires detailed knowledge on 5G NG-RAN signalling and function.

Prerequisites

Participation in the LTE Signalling training is beneficial.

Course content

● 5G system architecture

Overall network architecture
Nodes, functions and interfaces
5G identities

● 5G protocol architecture

Introduction (SAP, OSI model)
NG-RAN protocol layer
Strata (NAS, AS)
User plane
Control plane
QoS flow, profile, architecture
Radio interface structure
3GPP TS for 5G

● NAS

Domain selection
Network slicing
5GC mobility management (states, behaviour, procedures)
5GS session management (states, QoS, LADN, procedures)

● RRC

RRC protocol architecture
RRC services and functions
SRBs
RRC procedures and messages (system information, paging, RRC connection establishment, initial security activation, RRC connection reconfiguration, RRC connection re-establishment, RRC connection release, radio link failure related actions)

● NGAP

NGAP protocol architecture
NGAP procedures (PDU session management procedures, UE context management procedures, UE mobility management procedures, paging, interface management procedures)

● XnAP

XnAP protocol architecture
XnAP procedures (basic mobility procedures, procedures for Dual Connectivity, global procedures)

● F1AP

F1AP protocol architecture
F1AP procedures (interface management procedures, UE context management procedures, RRC message transfer procedures)

● Mobility

Intra-NR (measurements, mobility in RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED)
Inter RAT (intra 5GC, from 5GC to EPC)
Roaming and access restrictions

● 5G security

Security architecture
5G key hierarchy
Authentivation
NAS security
RRC security
Security of non-3GPP access

● SDAP

SDAP protocol architecture
SDAP services and functions
SDAP procedures
SDAP PDU formats

● PDCP

PDCP protocol architecture
PDCP services and functions
PDCP procedures
PDCP PDU formats

● RLC

RLC protocol architecture
RLC services and functions
RLC procedures and parameters
RLC PDU formats

● MAC

MAC protocol architecture
MAC services and functions
MAC procedures and parameters
MAC PDU formats

● NR physical layer

NR physical layer structure
Downlink physical channels and signals (P-SS, S-SS, PBCH, PT-RS, DM-RS, CSI-RS, PDCCH, PDSCH)
Uplink physical channels and signals (PT-RS, DM-RS, SRS, PUCCH, PUSCH, PRACH)