Content for TR 38.804 Word version: 14.0.0
2 References
3 Definitions and abbreviations
4 Deployment scenarios and guidelines
5 Overall system architecture
6 ARQ and HARQ
7 Scheduling
8 QoS control
9 Initial access
10 Mobility
11 Security
12 UE power saving
13 RAN support of Network Slicing
14 E-UTRA with NextGen Core
15 Specification methodology
A Agreements
B Summary of Layer 2 functional changes from LTE
C Background and evaluation results on on-demand SI provisioning
D Comparison results on bearer types for LTE-NR Dual Connectivity
E Study results on two-step Random Access procedure
F Network control mobility
G Small UL data transmission in RRC_INACTIVE
$ Change history
2 References p. 7
3 Definitions and abbreviations p. 8
3.1 Definitions p. 8
3.2 Abbreviations p. 8
4 Deployment scenarios and guidelines p. 8
4.1 Deployment scenarios p. 9
4.1.1 Cell layout p. 9
4.1.2 CN-RAN connection p. 9
4.1.2.1 NR gNB as a master node p. 9
4.1.2.2 LTE eNB as a master node p. 10
4.1.2.3 eNB connected to NextGen Core as a master node p. 10
4.1.2.4 Inter-RAT mobility p. 11
4.1.3 WLAN integration p. 11
4.2 Guidelines p. 12
5 Overall system architecture p. 13
5.1 Functional split p. 14
5.2 Radio interface protocol architecture p. 15
5.2.1 User plane p. 16
5.2.1.1 User plane protocol stack for NR p. 16
5.2.1.2 Bearer types for Dual Connectivity between LTE and NR p. 16
5.2.2 Control plane p. 17
5.3 Physical Layer p. 20
5.3.1 General description p. 20
5.3.2 Key DL concepts p. 20
5.3.3 Key UL concepts p. 20
5.3.4 Beam management p. 20
5.3.5 Channel structure p. 21
5.4 Layer 2 p. 22
5.4.1 Overview of Layer 2 functions p. 22
5.4.2 MAC Sublayer p. 24
5.4.3 RLC Sublayer p. 24
5.4.4 PDCP Sublayer p. 24
5.4.5 New AS Sublayer p. 25
5.4.6 Overview of Layer 2 data flow p. 25
5.4.7 Numerologies and TTI durations p. 26
5.5 RRC p. 26
5.5.1 Functions p. 26
5.5.2 UE states and state transitions p. 27
5.5.3 System information handling p. 29
5.5.4 Measurements p. 30
5.5.5 Access control p. 30
5.5.6 UE capability retrieval framework p. 31
6 ARQ and HARQ p. 31
7 Scheduling p. 31
8 QoS control p. 32
8.1 QoS architecture in NR and NextGen Core p. 32
8.2 Dual Connectivity between LTE and NR via EPC p. 33
9 Initial access p. 33
9.1 Cell selection p. 33
9.2 Random Access Procedure p. 34
10 Mobility p. 35
10.1 Intra NR p. 35
10.1.1 UE based mobility p. 35
10.1.1.1 Cell reselection p. 35
10.1.1.2 Paging p. 35
10.1.2 Network controlled mobility p. 36
10.2 Inter RAT p. 37
10.3 Dual Connectivity between LTE and NR p. 39
11 Security p. 39
12 UE power saving p. 40
13 RAN support of Network Slicing p. 40
14 E-UTRA with NextGen Core p. 40
15 Specification methodology p. 41
A Agreements p. 42
A.1 General aspects p. 42
A.2 User plane aspects p. 42
A.3 RRC p. 43
A.4 Intra-NR mobility and measurements p. 43
B Summary of Layer 2 functional changes from LTE p. 44
B.1 Rationale behind out-of-order delivery of complete PDCP PDUs after RLC SDU reassembly p. 44
B.2 Rationale behind concatenation in MAC and MAC sub-header interleaving p. 45
C Background and evaluation results on on-demand SI provisioning p. 45
C.1 Background p. 45
C.2 Analysis of technology potential p. 45
C.3 Additional evaluation results p. 50
D Comparison results on bearer types for LTE-NR Dual Connectivity p. 51
E Study results on two-step Random Access procedure p. 53
F Network control mobility p. 55
G Small UL data transmission in RRC_INACTIVE p. 55
$ Change history p. 57
