Content for TR 21.915 Word version: 15.0.0
5 The 5G System (5GS) - Phase 1
5.1 Work organisation for 5GS
5.2 The 5GS service aspects
5.3 Overview of the 5GS architecture
5.5 One step deeper into the 5GS
5.6 Other 5G aspects
5 The 5G System (5GS) - Phase 1 p. 9
5.1 Work organisation for 5GS p. 9
5.2 The 5GS service aspects p. 9
5.3 Overview of the 5GS architecture p. 10
5.3.1 Introduction p. 11
5.3.2 The NSA versus SA architecture p. 11
5.3.3 Overview of the Core Network p. 12
5.3.4 Overview of the Access Network p. 13
5.3.5 References for 5GS Stage 2 p. 13
5.5 One step deeper into the 5GS p. 14
5.5.1 Functional split between Radio and Core p. 14
5.5.2 The 5G Core Network p. 15
5.5.2.1 Main NFs p. 15
5.5.2.2 Specificities of the 5G Core Network and associated NFs p. 16
5.5.2.2.1 Local hosting of services and Edge Computing p. 16
5.5.2.2.2 Network slicing p. 16
5.5.2.2.3 Unified access control p. 17
5.5.2.2.4 Support of 3GPP and non-3GPP access p. 17
5.5.2.2.5 Policy framework and QoS support p. 17
5.5.2.2.6 Network capability exposure p. 18
5.5.2.2.7 Other specific services p. 18
5.5.2.2.8 Other 5G specificities p. 18
5.5.2.3 CN protocols p. 18
5.5.3 The 5G Access Network p. 20
5.5.3.1 Introduction p. 20
5.5.3.2 Overview of the AN Control Plane p. 21
5.5.3.3 Overview of the AN User Plane p. 22
5.5.3.4 The higher layers of the AN p. 22
5.5.3.4.1 Layer 2 related aspects: MAC, RLC, PDCP user plane, PCP control plane, and SDAP p. 22
5.5.3.4.2 RRC related aspects p. 23
5.5.3.5 The Access Network interfaces p. 23
5.5.4 Radio Physical layer aspects p. 25
5.5.4.1 Numerologies, waveform and frame structure p. 25
5.5.4.2 Physical Channels and Signals in NR p. 26
5.5.4.3 Initial access and mobility p. 27
5.5.4.4 MIMO aspects p. 29
5.5.4.5 PDCCH and PDSCH p. 30
5.5.4.6 PUCCH and PUSCH p. 31
5.5.4.7 Scheduling/HARQ p. 32
5.5.4.8 Carrier Aggregation, Bandwidth Parts, and LTE/NR dual connectivity p. 33
5.5.4.9 NR-LTE co-existence p. 33
5.5.4.10 Supplementary Downlink p. 33
5.5.4.11 Supplementary Uplink p. 33
5.5.4.12 UL TPC p. 33
5.5.5 Frequency aspects p. 34
5.6 Other 5G aspects p. 36
5.6.1 5G AN connected to 4G AN: NSA and EDCE5 p. 36
5.6.1.1 Overview p. 36
5.6.1.2 CN impacts: EPC enhancements to support 5G New Radio via Dual Connectivity (EDCE5) p. 36
5.6.1.3 AN impacts: NSA radio protocol architecture p. 38
5.6.1.3.1 Control Plane p. 38
5.6.1.3.2 User Plane p. 38
5.6.2 LTE connectivity to 5G-CN (4G AN with 5G CN) p. 39
5.6.3 Security aspects of the 5G System - Phase 1 p. 40
5.6.4 Charging and OAM aspects of 5G System - Phase 1 p. 43
