This document provides an agenda for a seminar on 5G physical layer technologies. It introduces 5G and compares it to 3G and 4G. It discusses OFDMA, MIMO, waveforms, numerology and frame structure, initial access and beam management, and bandwidth parts. The introduction gives an overview of 5G requirements and the OSI reference model. Later sections provide more details on these topics and their significance for 5G.

1. Towards 5G project
Ali Nikfal
Second seminar: 5G physical layer
2020-2021
Instagram: Ali.nikfal1985

2. Agenda
• Introduction to 5G
• OFDMA overview
• MIMO and Massive MIMO
• Waveform, Numerology and frame structure
• Initial access and Beam management
• Bandwidth parts

3. Introduction to 5G

4. 3G vs. 4G vs. 5G

6. 5G requirements

7. Introduction to 5G

8. OSI reference model

9. User-Plane RAN Protocol Stack

10. Control-Plane RAN Protocol Stack

11. OFDMA overview

12. OFDMA

13. What is the problem with this architecture?

16. OFDMA block diagram system

20. MIMO and Massive MIMO

39. Waveform, Numerology and frame structure

44. – Scalable numerology
•
•
•
Implications to slot duration
Implications to multiplexing of numerologies
Inter-subcarrier spacing interference
– Slot based vs. non-slot based scheduling
• Use cases for non-slot (i.e. mini-slot) based scheduling
– Dynamic TDD
• How to indicate link direction?
Waveform, Numerology andFrame Structure

45. Waveform
Waveform, Numerology and Frame Structure

51. Blank for calculation(LTE)

52. Blank for calculation(NR)

58. Initial Access and Beam management

60. InitialAccess Procedure
Initial Access and Beam Management

61. Beam-Sweeping and InitialAccess
ManagementInitialAccess and Beam

62. Beam-Sweeping and InitialAccess
InitialAccess and Beam Management
– The UE identifies the SSB within the SS Burst Set by using:
• Part of the time index carried by the PBCH DMRS
• The rest of the SSB time index carried by the PBCH data
– The UE identifies the best SSB
– The UE transmits PRACH on a set of resources depending on the best SSB time index
• An association between an SSB in the SS Burst Set and a subset of PRACH
resources and/or preamble indices is configured by a set of parameters in the system
information
The UE notifies the gNB with the best SSB by using the corresponding PRACH
resource for that SSB
•

63. Beam-Sweeping and InitialAccess
Initial Access and Beam Management

64. Bandwidth parts

65. – Bandwidth part definition
• How are bandwidth parts configured?
• How are bandwidth parts activated/deactivated?
– Motivation for the introduction of bandwidth parts
•
•
Why are bandwidth parts a great NR feature?
Use cases for bandwidth parts

66. Bandwidth Part Definition
Bandwidth Parts

67. Bandwidth Part Parameters
Bandwidth Parts

68. Bandwidth Part Operation
Bandwidth Parts

69. Bandwidth Part Use Cases
Bandwidth Parts

70. Bandwidth Part Use Cases
Bandwidth Parts

72. Thank you

73. References:
– 3GPP Webpage (www.3gpp.org)
– 3GPP RAN1 Documents (www.3gpp.org/ftp/tsg_ran/WG1_RL1)
– The METIS 2020 Project (www.metis2020.com)
– The 3G4G Blog (blog.3g4g.co.uk)
– Keysight Solutions (www.keysight.com/find/5G)