5G New Radio and NGRAN Duration: 2 days

5G New Radio and NGRAN
CONTENT
The course provides a technical description of the emerging standard for 5G radio access (‘New Radio, NR’) and radio access network (‘NGRAN’) developed by 3GPP as part of Release-15 and Release-16. The NR part of the course covers physical layer aspects of NR such as OFDM numerology, radio frame, subframe and slot structures. The course explains physical signals and channels used for synchronization, scheduling, HARQ and feedback.

The NGRAN part covers the overall RAN architecture and explains the various ‘split-node’ options available. The RAN-internal interfaces (Xn, F1 and E1) and related signalling protocols are covered as well as the NG-interfaces towards the 5G core network. Radio interface layer 2 and layer 3 protocols are also included.

This course is kept up to date in step with the evolving standards for NR and NGRAN. The contents listed in bullets below may therefore change slightly from one course event to the next. (Rel-15 is scheduled for completion Sept-2018 with some features moved to a ‘late drop’ March-2019. Rel-16 is expected to be completed March-2020.)

PREREQUISITES
Reasonably good technical knowledge of the LTE physical layer and the LTE radio and RAN protocols is highly recommended but not compulsory.

NOTE 1: This course is not delivered with the FoldOut methodology.
NOTE 2: The course is under the development and the content may be subject to changes.

LTE Refresh

  • Summary of LTE layer-1 concepts, protocol stacks and RAN features (for easier comparison with 5G)

5G Standardisation

  • Timeline for 5G standardization (3GPP and ITU)
  • Expected use cases (eMBB, mMTC, URLCC)
  • Formal ITU performance requirements on 5G

NR Physical Layer

  • NR frequency bands and carrier bandwidth options
  • NR protocol stack and channel architecture
  • Layer 1 processing for control and data channels
  • OFDM numerology for NR
  • NR Radio frame and subframe structure
  • NR slot configuration options
  • Self-contained slots and flexible numerology
  • Cell search: SS Blocks and PBCH
  • Random access procedure
  • CORESET configuration for control (PDCCH)
  • DCI formats for UL/DL scheduling assignments
  • Scheduling and HARQ procedures
  • DM-RS for FD/massive MIMO
  • CSI reporting for FD/massive MIMO
  • Phase Tracking and Sounding reference signals
  • Expected Release-16 NR features

Non Stand-Alone NR

  • 5G deployment options
  • Multi-RAT Dual Connectivity (MR-DC)
  • EN-DC (DC between LTE and NR)
  • Supplemental uplink (SUL) operation
  • Spectrum sharing between LTE and NR
  • User plane bearer options for EN-DC
  • New functionality to support NSA-NR (X2, S1, EPC)

5G Radio Access Network (NGRAN)

  • NGRAN nodes, interfaces and identity numbers
  • Radio layer 2 protocols (SDAP, PDCP, RLC, MAC)
  • NR Radio Resource Control protocol (RRC)
  • RRC states and state transitions
  • RAN-level Notification Areas (RNA)
  • NG-interface and NG Application Protocol (NGAP)
  • Xn-interface and Xn Application Protocol (XnAP)
  • Architectural split options (CU/DU and CP/UP split)
  • CU/DU split: F1-interface and F1AP protocol
  • CP/UP split: E1-interface and E1AP protocol
  • User Plane protocols (NG, Xn, F1-interface)
  • Relevant NGRAN signalling procedures for above mentioned protocols

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