) 159 nFAPI (Network FAPI) 214, 217, 218, 220, NSI (Network Slice Instance) 326, 328-338, 222, 226-228, 233, 301 341, 342, 344 NFMF (Network Function Management NSMF (Network Slice Management Function) 335 Function) 335 NFV (Network Function Virtualization) 30, NSSAI (Network Slice Selection Assistance 215, 283-285, 304-307, 313, 341, 367, Information) 52, 53, 67, 68, 78, 91, 373-374 336, 370 NFV/SDN (Network Function Virtualization NSSF (Network Slice Selection Function) and Software Defined Networks) 215 40, 43, 364 NFVI (Network Function Virtualization NSSI (Network Slice Subnet Instance) 326, Infrastructure) 283, 307 328-330, 332, 334-338, 340, 342, 344 NFVO (Network Function Virtualization NSSMF (Network Slice Subnet Management Orchestrator) 284, 307, 313 Function) 335 NG-AP (NG Application Protocol) 64-67, NTN (Non-terrestrial Network) 257-276 73, 79, 90-92, 96, 243 NTP (Network Time Protocol) 359 NG-C (NG Control Plane) 63-70, 160, 161, 178, 180, 240, 342 Numerology 85, 86, 98-101, 104, 192, 201, NG-U (NG User Plane) 58, 62, 63, 69-70, 75, 249, 270, 339, 340 81, 82, 88, 158, 164, 165, 168, 178, 180, NWDAF (Network Data Analytics Function) 182-184, 240 NGEN-DC (E-UTRA-NR Dual Connectivity) 157-161, 163-167 NGFI (Next Generation Fronthaul Interface) O-DU (O-RAN Distributed Unit) 129, 129, 193 196-202, 207-211, 280, 289, 290 NGMN (Next Generation Mobile Networks) O-RU (O-RAN Radio Unit) 129, 196-202, 28, 35, 229, 233, 311, 324 207-211, 289, 290 NHN (Neutral Host Network) OAI (Open Air Interface) 295, 296, 298, NHOP (Next Hop) 300-302 NID (Network ID) 54, 55 OAM (Operation, Administration and nLOS (Non-line-of-sight) Maintenance) 3, 8, 31, 132, 141, 143, NMM (Network Monitor Mode) 228 146, 148, 154, 155, 177, 187, 190, 209, NMS (Network Management System) 210-211, 228, 242, 250, 287, 288, 295, 283, 289, 340, 369 326, 334, 338, 340, 343, 356, 361, NNHOP (Next Next Hop) 365-367, 371, 372, 377 Index OBSAI (Open Base Station Architecture PAPR (Peak to Average Power Ratio) 101, Initiative) 129, 138, 139 111, 115, 1