Accountability Act (HIPPA) 331 Frequency Range 2 (FR2) 95 High Definition (HD) mapping 316 frequency range (FR) groups 356 Home Subscriber Server (HSS) 179, 219 fronthaul network 261 Hybrid Automatic Repeat Request Full Self-Driving (FSD) 302 (HARQ) 120, 130, 131 functional testing 379 hybrid cloud using 272 General Motors (GM) 298 Generic Public Subscription Immersive Voice and Audio Identifier (GPSI) 66 Services (IVAS) 176 Geostationary Earth Orbit initial access procedure 96, 97 (GEO) satellites 352 integration planning Geostationary Equatorial Orbit in multivendor environment 378, 379 (GEO) satellites 340 Intelligent Transportation Geosynchronous Equatorial Orbiting Systems (ITS) 305 (GEO) satellite 345 Inter-American Telecommunication characteristics 353 Commission (CITEL) 350 GET method 58 International Mobile Subscriber Globally Unique AMF ID (GUAMI) 47 Identity (IMSI) 45 Globally Unique Temporary International Mobile Telecommunications Identifiers (GUTIs) 46 (IMT) 3, 356 Global Navigation Satellite International Mobile Telecommunications System (GNSS) 345 (IMT) 2020 81 reference link 345 International Telecommunication Global Positioning System (GPS) 344,345 Union (ITU) 348, 349 reference link 348 Index International Telecommunication Union Lightweight Directory Access - Radiocommunication (ITU-R) 3 Protocol (LDAP) 179 Internet Engineering Task Force (IETF) 321 Link Adaptation (LA) 77 Internet of Things (IoT) 320 logical channels 75 Internet Protocol Television (IPTV) 320 long PUCCH 127, 128 Inter Radio Access Technology (IRAT) 78 Long-Term Evolution (LTE) 95, 115 Interrogating CSCF (I-CSFC) 178 versus NR 79, 80 inter-satellite link (ISL) 357 Long-Term Evolution (LTE) evolved Inter Symbol Interference (ISI) 81 NodeB (eNB) 210 Inter-System Handover 188 Low-Density Parity Check (LDPC) code 128 interworking 185, 186, 231 Low Earth Orbit (LEO) with legacy voice networks 186 satellites 342, 345, 352 Intrusion Detection Systems/Intrusion Low-Noise Block Downconverter (LNB) 350 Prevention Systems (IDSs/IPSs) 336