Content for TR 38.801 Word version: 14.0.0
11 RAN logical architecture for NR
12 SON
13 Wireless relay
14 Migration towards RAN for NR
15 Interworking with non-3GPP systems
A Transport network and RAN internal functional split
B NG Interface Protocol Stacks for User Plane
$ Change History
11 RAN logical architecture for NR p. 58
11.1 Functional split between central and distributed unit p. 58
11.1.1 General description of split options p. 58
11.1.2 Detailed Description of Candidate Split Options and Justification p. 60
11.1.2.1 Option 1 (RRC/PDCP, 1A-like split) p. 60
11.1.2.2 Option 2 (PDCP/RLC split) p. 60
11.1.2.3 Option 3 (High RLC/Low RLC Split) p. 61
11.1.2.4 Option 4 (RLC-MAC split) p. 62
11.1.2.5 Option 5 (intra MAC split) p. 63
11.1.2.6 Option 6 (MAC-PHY split) p. 63
11.1.2.7 Option 7 (intra PHY split) p. 64
11.1.2.8 Option 8 (PHY-RF split) p. 65
11.1.2.9 Summary table p. 65
11.1.3 Architectural and specification aspects p. 66
11.1.3.1 Number of split options to be specified and supported by open interface p. 66
11.1.3.2 Implications of LTE/NR tight interworking p. 67
11.1.3.3 Granularity of the Functional Split p. 67
11.1.3.4 Reconfiguration dynamicity of the functional split p. 67
11.1.3.5 Standardization of Centralized RRM Functions p. 68
11.1.3.6 Standardization Issues with Centralized scheduling Options p. 68
11.1.3.7 Transmission of RRC message over the CU-DU link p. 68
11.1.3.8 CU-DU specification aspects p. 69
11.1.4 Transport network aspects p. 69
11.1.4.1 General p. 69
11.1.4.2 Transport network requirements for an example RAN architecture for NR p. 69
11.1.5 Conclusions on functional split between central and distributed unit p. 70
11.2 UP-CP Separation p. 70
11.2.1 General p. 70
11.2.2 UP and CP Functions Description and Grouping p. 71
11.2.3 RAN architecture and interfaces for UP-CP Separation p. 72
11.2.4 Conclusions p. 74
11.3 Realization of RAN Network Functions p. 75
12 SON p. 75
13 Wireless relay p. 75
13.1 Scenarios p. 75
14 Migration towards RAN for NR p. 76
14.1 Potential migration path 1 p. 76
14.2 Potential migration path 2 p. 76
14.3 Potential migration path 3 p. 77
14.3.1 General p. 77
14.3.2 Potential migration path 3-1 p. 77
14.3.3 Potential migration path 3-2 p. 77
14.3.4 Potential migration path 3-3 p. 77
14.3.5 Potential migration path 3-4 p. 78
14.3.6 Potential migration path 3-5 p. 78
14.4 Potential migration path 4 p. 78
14.5 Potential migration path 5 p. 79
14.6 Implications of migration paths on RAN3 p. 79
15 Interworking with non-3GPP systems p. 80
A Transport network and RAN internal functional split p. 81
B NG Interface Protocol Stacks for User Plane p. 84
$ Change History p. 90
