List of Abbreviations
| Term | Meaning |
| 3D | Three‐Dimensional |
| 3G | 3rd Generation (cellular communications) |
| 3GPP | 3rd Generation Partnership Project |
| 4G | 4th Generation (cellular communications) |
| 5G | 5th Generation (cellular communications) |
| 5G AP | 5G Action Plan |
| 5G IA | 5G Infrastructure Association |
| 5G PPP | 5th Generation Public Private Partnership |
| 5GAA | 5G Automotive Association |
| 5GC | 5G Core Network |
| 5GMF | Fifth Generation Mobile Communication Promotion Forum |
| 5GPoAs | 5G Points of Attachment |
| 5GTTI | 5G Trial & Testing Initiative |
| AAS | Active Antenna System |
| ABG | Alpha Beta Gamma |
| ABS | Almost Blank Subframes |
| ABNO | Applications‐Based Network Operations |
| ACDM | Algebraic Channel Decomposition Multiplexing |
| ACK | Acknowledged |
| A‐CPI | Application‐Controller Plane Interface |
| ADB | Aggregated Data Bundle |
| ADC | Analog‐to‐Digital Converter |
| AE | Action Enforcer |
| AF | Application Function |
| AF‐x | Adaptation Function–number x |
| AI | Air Interface |
| AIV | Air Interface Variant |
| AL | Aggregation level |
| AM | Acknowledged Mode |
| AMC | Adaptive Modulation and Coding |
| AMF | Access and Mobility Management Function |
| AN | Access Network |
| ANDSF | Access Network Discovery and Selection Function |
| AN‐I | Access Network‐Inner (layer) |
| ANN | Artificial Neural Networks |
| AN‐O | Access Network‐Outer (layer) |
| ANQP | Access Network Query Protocol |
| AP | Access Point |
| API | Application Programming Interface |
| APT | Average Power Tracking |
| AR | Augmented Reality |
| ARIB | Association of Radio Industries and Businesses |
| ARP | Allocation and Retention Priority |
| ARPU | Average Revenue Per User |
| ARQ | Automatic Repeat reQuest |
| AS | Access Stratum |
| ASIC | Application Specific Integrated Circuit |
| AS‐PCE | Active Stateful Path Computation Element |
| ATIS | Alliance for Telecommunications Industry Solutions |
| AUSF | Authentication Server Functions |
| BB | BaseBand |
| BBU | BaseBand Unit |
| BCH | Reed Muller or Bose, Ray‐Chaudhuri and Hocquenghem codes |
| BCJR | Bahl, Cocke, Jelinek and Raviv algorithm |
| BF | BeamForming |
| BF‐OFDM | Block‐Filtered OFDM |
| BH | BackHaul |
| BLER | Block Error Rate |
| BMS | Broadcast/Multi‐cast Services |
| BPSK | Binary Phase Shift Keying |
| BRP | Beam Resource Pool |
| BS | Base Station |
| BSM | Basic Safety Message |
| BSR | Buffer State Reporting |
| BSS | Business Support System |
| B‐TAG | Backbone VLAN Tag |
| BV | Bandwidth‐Variable |
| BVT | Bandwidth‐Variable Transponders |
| C/I | Carrier‐to‐Interference (ratio) |
| CA | Carrier Aggregation |
| CAGR | Compound Annual Growth Rate |
| CAM | Cooperative Awareness Messages |
| CAPEX | Capital Expenditures |
| CCDF | Complementary Cumulative Distribution Function |
| CCE | Control Channel Entity |
| CCH | Control Channel |
| CCNF | Common Control Network Functions |
| CCSA | China Communications Standards Association |
| CD | Code Division |
| CDF | Cumulative Distribution Function |
| CDMA | Code Division Multiple Access |
| CDN | Content Delivery Network |
| CH | Cluster Head |
| CI | Close‐In |
| CIoT | Cellular Internet of Things |
| C‐ITS | Cooperative‐ITS |
| CLI | Cross‐Link Interference |
| CMO | Control, Management and Orchestration |
| CMOS | Complementary Metal‐Oxide Semiconductor |
| CN | Core Network |
| CoMP | Coordinated/Cooperative Multi‐Point |
| COST | European Cooperation in Science and Technology |
| COTS | Commercial Off‐The‐Shelf |
| CP | Control Plane |
| CPE | Common Phase Error |
| CPM‐19 | Conference Preparatory Meeting in 2019 |
| CP‐OFDM | Cyclic Prefix OFDM |
| CPRI | Common Public Radio Interface |
| CPU | Central Processing Unit |
| CQI | Channel Quality Indicator |
| C‐RAN or CRAN | Centralized/Cloud Radio Access Network |
| CRC | Cyclic Redundancy Check |
| C‐RNTI | Cell Radio Network Temporary Identifier |
| CRS | Cell‐specific Reference Symbols |
| CSI | Channel State Information |
| CSIT | Channel State Information (transmitter side) |
| CSMA/CA | Carrier Sense Multiple Access with Collision Avoidance |
| CSP | Communication Service Provider |
| CTC | Convolutional Turbo Codes |
| CTO | Chief Technology Officer |
| CU | Central Unit |
| D2D | Device‐to‐Device |
| D2N | Device‐to‐Network |
| DAC | Digital‐to‐Analog Converter |
| DAS | Distributed Antenna System |
| DBSCAN | Density‐Based Spatial Clustering of Applications with Noise |
| DC | Dual Connectivity |
| DCC | Decentralized Congestion Control |
| DCI | Downlink Control Information |
| DCN | Dedicated Core Network |
| D‐CPI | Data‐Controller Plane Interface |
| DD‐OFDM | Direct Detection OFDM |
| DDoS | Distributed Denial of Service |
| DECOR | Dedicated Core |
| DEI | Drop Eligible Indicator |
| DEN | Decentralized Environmental Notification |
| DFT | Digital Fourier Transform |
| DFT‐s‐OFDM | DFT‐spread OFDM |
| DL | Downlink |
| DM | Decision‐Maker |
| DMC | Dense Multipath Component |
| DMRS | DeModulation Reference Signal |
| DNS | Domain Name System |
| DoS | Denial of Service |
| DPD | Digital Pre‐Distortion |
| DPDK | Data Plane Development Kit |
| DR | D2D Receiver |
| D‐RAN | Distributed Radio Access Network |
| DRB | Data Radio Bearer |
| DRX | Discontinuous Reception |
| DSC | Decentralized Congestion Control Sensitivity Control |
| DSP | Digital Signal Processor |
| DSRC | Dedicated Short Range Communications |
| DT | Decision Tree |
| DTT | Digital Terrestrial Television |
| DTX | Discontinuous Transmission |
| DU | Distributed Unit |
| DVB | Digital Video Broadcasting |
| DWDM | Dense Wavelength Division Multiplexing |
| E2E | End‐to‐End |
| EATA | European Automotive‐Telecom Alliance |
| EC | European Commission |
| ECDSA | Elliptic Curve Digital Signature Algorithm |
| EDCA | Enhanced Distributed Channel Access |
| eDECOR | evolved DECOR |
| eICIC | Enhanced Inter‐Cell Interference Coordination |
| eIMTA | Enhanced Interference Mitigation and Traffic Adaptation |
| EIRP | Effective Isotropic Radiated Power |
| eLTE | enhanced Long‐Term Evolution |
| EM | Element Management |
| eMBB | enhanced Mobile BroadBand |
| eMBMS | enhanced Mobile Broadband Multimedia Services |
| EMF | Electro‐Magnetic Field |
| eNB | enhanced Node‐B |
| EPC | Enhanced Packet Core |
| ePDCCH | enhanced PDCCH |
| EPS | Evolved Packet System |
| ET | Envelope Tracking |
| ETH | Ethernet |
| ETN | Edge Transport Nodes |
| ETSI | European Telecommunications Standards Institute |
| EU | European Union |
| E‐UTRA | Evolved‐UTRA |
| EVM | Error Vector Magnitude |
| F1 | Horizontal interface in the RAN |
| F1‐C | Horizontal interface in the RAN (control plane) |
| F1‐U | Horizontal interface in the RAN (user plane) |
| FBMC | Filter Bank Multi‐Carrier |
| FBR | Front‐to‐Back Ratio |
| FCAPS | Fault Configuration, Accounting, Performance, Security |
| FCC | Federal Communications Commission |
| FC‐OFDM | Flexibly Configured – OFDM |
| FD | Full Duplex |
| FDD | Frequency Division Duplexing |
| FDM | Frequency Division Multiplexing |
| FDMA | Frequency Division Multiple Access |
| FDV | Frame‐Delay Variation |
| FEC | Forward Error Correction |
| FeICIC | Further enhanced Inter‐Cell Interference Coordination |
| FFT | Fast Fourier Transform |
| FH | Fronthaul |
| FI | Float Intercept |
| FIR | Finite Impulse Response |
| FN | False Negatives |
| FP | False Positives |
| FPGA | Field Programmable Gate Array |
| FQAM | Frequency Quadrature Amplitude Modulation |
| FS | Feature Selection |
| Fs‐C | Intra‐RAN control plane interface |
| FSPL | Free‐Space Path Loss |
| Fs‐U | Intra‐RAN user plane interface |
| FTP | File Transfer Protocol |
| FTTA | Fiber‐to‐the‐Antenna |
| GA | Genetic Algorithm |
| GAA | General Authorized Access |
| GaN | Gallium Nitride |
| GAN | Generic Access Network |
| GDB/GLDB | GeoLocation DataBase |
| GEPON | Gigabit Ethernet PON |
| GFDM | Generalized Frequency Division Multiplexing |
| GLOSA | Green Light Optimal Speed Advice |
| GMPLS | Generalized Multi‐Protocol Label Switching |
| gNB | Gigabit (enhanced) Node‐B |
| GOPS | Giga Operations |
| GPON | Gigabit PON |
| GPP | General Purpose Processing |
| GPRS | General Packet Radio Service |
| GPS | Global Positioning System |
| GSCM | Geometry‐based Stochastic Channel Model |
| GSM | Global System for Mobile Communications |
| GTP | GPRS Tunnelling Protocol |
| GUI | Graphical User Interface |
| HARQ | Hybrid Automatic Repeat reQuest |
| HD | High Definition |
| HO | HandOver |
| HPA | High Power Amplifier |
| HSIC | Hybrid Self Interference Cancellation |
| HSPA | High‐Speed Packet Access |
| HSS | Home Subscriber System |
| HSTD | Horizontal Security and Trust Domains |
| HTHP | High Tower High Power |
| HW | Hardware |
| I2I | Indoor‐to‐Indoor |
| IaaS | Infrastructure‐as‐a‐Service |
| IAD | Interference‐Aware Detection |
| IAN | Interference‐as‐Noise |
| IASD | Interference‐Aware Successive Decoding |
| IAT | Inter‐Arrival Time |
| IATN | Inter Area Transport Node |
| IBFD | In‐Band Full‐Duplex |
| ICI | Inter Carrier Interference |
| ICIC | Inter‐Cell Interference Coordination |
| I‐CPI | Intermediate‐Controller Plane Interface |
| ICT | Information and Communications Technology |
| ID | Identifier |
| IDFT | Inverse DFT |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| iFFT | inverse Fast Fourier Transform |
| IFOM | IP Flow Mobility |
| IIC | Industrial Internet Consortium |
| IIR | Infinite Impulse Response |
| IMS | IP Multimedia Subsystem |
| IMT | International Mobile Telecommunications |
| IMT2020 or IMT‐2020 | IMT for year 2020 and beyond |
| IMT‐A | IMT‐Advanced |
| INR | Interference‐to‐Noise Ratio |
| IoT | Internet of Things |
| IP | Internet Protocol |
| IPr | Intellectual Property |
| IPsec | Internet Protocol Security |
| IPv4 | Internet Protocol version 4 |
| IPv6 | Internet Protocol version 6 |
| IQ | Inphase and Quadrature Phase |
| IR | Incremental Redundancy |
| IR‐HARQ | incremental redundancy HARQ |
| ISD | Inter‐Site Distance |
| ISG | Industry Standard Group (in ETSI) |
| ISI | Inter Symbol Interference |
| ISM | Industrial, Scientific and Medical |
| ISO | International Organization for Standardization |
| IT | Information Technology |
| I‐TAG | Backbone Service Instance Tag |
| ITS | Intelligent Transport Systems |
| ITU | International Telecommunication Union |
| ITU‐R | ITU ‐ Radiocommunication sector |
| JT | Joint transmission |
| KED | Knife Edge Diffraction |
| KPI | Key Performance Indicator |
| KSP | Known Symbol Padding |
| KTX | Korea Train eXpress |
| LAA | License(d)‐Assisted Access |
| LBT | Listen‐Before‐Talk |
| LCP | Logical Channel Prioritization |
| LD | Linear Discriminant |
| LDM | Local Dynamic Map |
| LDPC | Low Density Parity Check |
| LIME | Linda in a Mobile Environment |
| LIPA | Local IP Access |
| LLC | Logical link control |
| LNA | Low Noise Amplifier |
| LO | Local Oscillator |
| LoRa | Long Range, low power technology |
| LOS | Line‐of‐Sight |
| LPWA | Low Power Wide Area |
| LSA | Licensed Shared Access |
| LSE | Least Squares Estimation |
| LSO | Lifecycle Service Orchestration |
| LTE(‐A) | Long‐Term Evolution (Advanced) |
| LWA | LTE‐WLAN Aggregation |
| LWAAP | LTE‐WLAN Aggregation Adaptation protocol |
| LWIP | LTE/Wi‐Fi Radio Level Integration Using IPsec Tunnel |
| M2M | Mobile‐to‐Mobile |
| MAC | Medium Access Control |
| MANO | Management & Orchestration |
| MAP | Maximum a Posteriori |
| MAPCON | Multi‐Access PDN Connectivity |
| MBB | Mobile BroadBand |
| MBHM | Map‐Based Hybrid Modeling |
| MBMS | Multimedia Broadcast Multicast Services |
| MBSFN | Multicast‐Broadcast Single Frequency Network |
| MC | Multi‐Carrier |
| MCC | Mission Critical Communications |
| MCP | Measurement Configuration Profile |
| MCS | Modulation and Coding Scheme |
| MdO | Multi‐domain Orchestrator |
| MD‐PCE | Multi‐Domain Path Computation Element |
| MEC | Mobile Edge Computing or Multi‐Access Edge Computing |
| ME | Multi‐Edge |
| ME‐LDPC | Multi‐Edge LDPC |
| MeNB | Master (enhanced) Node‐B |
| METIS (‐II) | Mobile and wireless communications Enablers for the Twenty‐twenty Information Society (‐II) |
| MIB | Master Information Block |
| MIC | Ministry of Internal Affairs and Communications, Japan |
| MIIT | Ministry of Industry and Information Technology |
| MIMO | Multiple‐Input Multiple‐Output |
| MIPS | Million Instructions Per Second |
| MISO | Multiple Input Single Output |
| ML | Machine Learning |
| MLD | Maximum Likelihood Decoding |
| MM | Mobility Management |
| MMC | Massive Machine Communications |
| MME | Mobility Management Entity |
| MMIMMO | Massive Multiple‐Input Massive Multiple‐Output |
| MMSE‐IRC | Minimum Mean Squared Error – Interference Rejection Combining |
| mMTC | Massive Machine‐Type Communications |
| mmW, mmWave | millimeter‐Wave |
| MNO | Mobile Network Operator |
| MOCN | Multi‐Operator Core Network |
| MOP | Multi‐Objective Optimization |
| MORAN | Mobile Operator Radio Access Network |
| MP | Memory Polynomial |
| MP | Message Passing |
| MPLS | Multi Protocol Label Switching |
| MPLS‐TP | MPLS Transport Profile |
| MP‐TCP | Multi‐Path Transmission Control Protocol |
| M‐RRC | Master Radio Resource Control |
| MS | Min‐Sum |
| MSE | Mean‐Square‐Error |
| MSIP | Ministry of Science, Information and Future Planning, South Korea |
| MT | Mobile Terminated |
| MTA | Multi‐Tenancy Application |
| MTC | Machine‐Type Communications |
| MTU | Maximum Transmission Unit |
| MU‐MIMO | Multi User MIMO |
| MVNO | Mobile Virtual Network Operator |
| MWC | Mobile World Congress |
| N2 | Control plane interface betw. RAN and core network in 5G → NG‐C |
| N3 | User plane interface betw. RAN and core network in 5G → NG‐U |
| NACK | Negative Acknowledged |
| NAICS | Network Assisted Interference Cancellation and Suppression |
| NAS | Non Access Stratum |
| NB | NarrowBand |
| NBAP | Node‐B Application Part |
| NBI | North Bound Interface |
| NBIFOM | Network‐Based Internet Protocol Flow Mobility |
| NB‐IoT | NarrowBand Internet of Things |
| NCO | Numerically Controlled Oscillator |
| NEF | Network Exposure Function |
| NF | Network Function |
| nFAPI | Network functional Application Programming Interface |
| NFV | Network Function Virtualization |
| NFVI | Network Function Virtualization Infrastructure |
| NFVO | NFV Orchestrator |
| NG | Next Generation |
| NG‐C | Control plane interface betw. RAN and core network in 5G → N2 |
| NGCO | New Generation Central Office |
| NGFI | Next Generation Fronthaul Interface |
| NGMN | Next Generation Mobile Networks |
| NGPoP | Next Generation Point of Presence |
| NG‐RAN | Next Generation Radio Access Network |
| NG‐U | User plane interface betw. RAN and core network in 5G → N3 |
| NG‐Uu | Interface between network and device in 5G |
| NHTSA | National Highway Traffic Safety Administration |
| NIC | Network Interface Controller |
| NLoS | Non‐Line‐of‐Sight |
| NMSE | Normalized Mean Square Error |
| NN | Nomadic Node |
| NNSF | Network Node Selection Function |
| NOI | Notice of Inquiry |
| NPRM | Notice of Proposed Rulemaking |
| NPV | Net Present Value |
| NR | New Radio |
| NRA | National Regulatory Authority |
| NRF | Network Repository Function |
| NS | Network Service |
| NSA | Non‐StandAlone |
| NSD | Network Service Descriptors |
| NS‐FAID | Non‐Surjective Finite Alphabet Iterative Decoder |
| NSI | Network Slice Instance |
| NSMF | Network Slice Management Function |
| NSSF | Network Slice Selection Function |
| NST | Network Slice Template |
| NYU | New York University |
| O2I | Outdoor‐to‐Indoor |
| O2O | Outdoor‐to‐Outdoor |
| OAI | Open Air Interface |
| OAM | Operations, Administration and Management/Maintenance |
| OBSAI | Open Base Station Architecture Initiative |
| OBU | On‐Board Unit |
| OF | OpenFlow |
| OFDM | Orthogonal Frequency Division Multiplex |
| OFDMA | Orthogonal Frequency Division Multiple Access |
| OFNC | Open‐Flow Network Controller |
| OLT | Optical Line Terminal |
| ONF | Open Networking Foundation |
| ONU | Optical Network Unit |
| OOB | Out Of Band |
| OPEX | Operational Expenditures |
| OPI | Offload Preference Indicator |
| OPS | Operations |
| OQAM | Offset Quadrature Amplitude Modulation |
| OS | Operating System |
| OSI | Open System Interconnection |
| OSM | Open Source Management and Orchestration |
| OSS | Operations Support System |
| OTN | Optical Transport Network |
| OTT | Over The Top |
| OvS | Open vSwitch |
| OVSDB | Open vSwitch Database Management Protocol |
| PA | Power Amplifier |
| PaaS | Platform‐as‐a‐Service |
| PAE | Power Added Efficiency |
| PAL | Primary Access Licenses |
| PAM | Pulse‐Amplitude Modulation |
| PAPR | Peak‐to‐Average Power Ratio |
| PBB | Provider Backbone Bridging |
| PBCH | Physical Broadcast CHannel |
| PC | Polar Codes |
| PCA | Principal Component Analysis |
| PCell | Primary Cell |
| PCF | Policy Control Function |
| PCHA | Personal Connected Health Alliance |
| PCI | Physical Cell ID |
| PCM | Parity Check Matrices |
| PCP | Priority Code Points |
| PCR | Pilot Contamination Regime |
| PCRF | Policy and Charging Rules Function |
| PDCA | Plan, Do, Check, Adjust |
| PDCCH | Physical Downlink Control CHannel |
| PDCP | Packet Data Convergence Protocol |
| PDN | Packet Data Network |
| PDP | Power Delay Profile |
| PDSCH | Physical Downlink Shared Channel |
| PDU | Protocol Data Unit |
| PDV | Packet Delay Variation |
| PER | Packet Error Rate |
| PGIA | Pre‐emptive Geometrical Interference Analysis |
| PGW | Packet Data Network Gateway |
| PHY | Physical layer |
| PLL | Phase‐Locked Loop |
| PLMN | Public Land Mobile Network |
| PLOS | Probability Loss |
| PLS | Physical Layer Security |
| PMI | Precoding Matrix Indicator |
| PMIP | Proxy Mobile IP |
| PMSE | Programme Making and Special Events |
| PN | Polyphase Network |
| PNF | Physical Network Function |
| P‐OFDM | Pulse Shaped OFDM |
| PON | Passive Optical Network |
| PoP | Point of Presence |
| PPC | PolyPhase Components |
| PPDR | Public Protection and Disaster Relief |
| PPI | Power Preference Indicator |
| PPN | PolyPhase Network |
| PPP | Public Private Partnership |
| PRACH | Physical Random Access CHannel |
| PRB | Physical Resource Block |
| PRG | Precoding Resource Block Group |
| PS | Packet Switched |
| PSS | Primary Synchronization Signal |
| PTM | Point‐To‐Multi‐point |
| PUCCH | Physical Upling Control CHannel |
| PUSCH | Physical Uplink Shared CHannel |
| PVM | Probe Vehicle Message |
| PVNO | Private Virtual Network Operator |
| PWS | Public Warning System |
| QAM | Quadrature Amplitude Modulation |
| QC | Quasi‐Cyclic |
| QCI | QoS Class Identifier |
| QFI | QoS Flow Identity |
| QoE | Quality of Experience |
| QoS | Quality of Service |
| QPP | Quadratic Permutation Polynomial |
| RA | Random Access |
| RACH | Random Access Channel |
| RAM | Random Access Memory |
| RAN | Radio Access Network |
| RAT | Radio Access Technology |
| RAU | Radio Aggregation Unit |
| RB | Resource Block |
| RCC | Radio Cloud Center |
| RCLWI | RAN Controlled LTE WLAN Interworking |
| RE | Resource Element |
| REG | Resource Element Groups |
| REM | Radio Environment Map |
| RF | Radio Frequency |
| RFSIC | Radio Frequency Self Interference Cancelation |
| RIT | Radio Interface Technology |
| RITA | Research and Innovative Technologies Administration |
| RLC | Radio Link Control |
| RM | Resource Management |
| RMS | Root Mean Square |
| RNC | Radio Network Controller |
| RoE | Radio over Ethernet |
| RoHC | Robust Header Compression |
| ROI | Return on Investment |
| RRC | Radio Resource Control |
| RRH | Remote Radio Head |
| RRM | Radio Resource Management |
| RRU | Remote Radio Unit |
| RS | Reference Symbol |
| RSA | Roadside Alert |
| RSC | Resources Sharing Cluster |
| RSRP | Reference Signal Received Power |
| RSRQ | Reference Signal Received Quality |
| RTA | RAN Tracking Area |
| RTT | Round Trip Time |
| RU | Remote Unit |
| Rx | Receiver |
| SaaS | Software‐as‐a‐Service |
| SAE | Society of Automotive Engineers |
| SAS | Spectrum Access System |
| SBI | Service‐Based Interface |
| sBH | Self‐BackHauling |
| S‐BVT | Sliceable‐Bandwidth Variable Transponders |
| SC | Single Carrier |
| SCell | Secondary Cell |
| SCF | Small Cell Forum |
| SC‐FDMA | Single Carrier Frequency Division Multiple Access |
| SCM | Spatial Channel Model |
| SCME | Spatial Channel Model Extension |
| SCNF | Slice‐specific Control Network Function |
| SD | Slice Differentiator |
| SDAP | Service Data Adaptation Protocol |
| SDMA | Space Division Multiple Access |
| SDM‐C | Software‐Defined Mobile Network Controller |
| SDM‐X | Software‐Defined Mobile Network Coordinator |
| SDN | Software‐Defined Networking |
| SDR | Software‐Defined Radio |
| SD‐RAN | Software‐Defined Radio Access Network |
| SDT | Small Data Transmission |
| SDU | Service Data Unit |
| SeNB | Secondary enhanced Node‐B |
| SFBC | Spatial‐Frequency Block Codes |
| SFN | Single Frequency Network |
| SGW | Serving Gateway |
| SHF | Super High Frequency |
| SI | Self Interference |
| SIB | System Information Block |
| SiC | Silicon Carbide |
| SIC | Self Interference Cancelation |
| SIM | Subscriber Identity Module |
| SIMO | Single Input Multiple Output |
| SINR | Signal to Interference plus Noise Ratio |
| SIPTO | Selected IP Traffic Offloading |
| SIW | Substrate Integrated Waveguide |
| SLA | Service Level Agreement |
| SMA | Service Monitoring & Analytics |
| SMF | Session Management Function |
| SMS | Spectrum Management System |
| SN | Sequence Number |
| SNR | Signal‐to‐Noise Ratio |
| S‐NSSAI | Single Network Slice Selection Assistance Information |
| SOI | Silicon‐On‐Insulator |
| SON | Self‐Organizing Network |
| SP | Strict Priority |
| SPAT | Signal Phase and Timing |
| SPM | Security Policy Manager |
| SPS | Semi‐Persistent Scheduling |
| SPTP | Small Packet Transmit Procedure |
| SR | Scheduling Request |
| SRIT | Set of RITs |
| SRM | Slice Resource Manager |
| S‐RRC | Secondary Radio Resource Control |
| SRS | Sounding Reference Signal |
| SSB | Synchronization Signal Block |
| SSS | Secondary Synchronization Signal |
| SST | Slice/Service Type |
| SU | Single User |
| SVD | Single Value Decomposition |
| SVM | Support Vector Machine |
| SW | Software |
| SWA | Software Architectures |
| SWCM | Sliding‐Window Coded Modulation |
| SYNC | Synchronization |
| TA | Timing Advance |
| TAC | Transmit Access Control |
| TAU | Tracking Area Update |
| TBCC | Tail‐Biting Convolutional Codes |
| TBS | Transport Block Size |
| TC | Turbo Code |
| TCP | Transmission Control Protocol |
| TD | Time Division |
| TDC | Transmit Datarate Control |
| TDD | Time Division Duplex |
| TDMA | Time Division Multiple Access |
| TE | Traffic Engineering |
| TG | Task Group |
| THR | Throughput |
| TM | Transverse Magnetic |
| TMC | Traffic Management Center |
| TMS | Transmission Mode Selection |
| TN | Transport Node |
| TNeg | True Negatives |
| TO | Timing Offset |
| TOSCA | Topology and Orchestration Specification for Cloud Applications |
| TP | True Positives |
| TPC | Transmit Power Control |
| TR | Technical Report |
| TRC | Transmit Rate Control |
| TRP | Transmission Reception Point |
| TS | Technical Specification |
| TSDSI | Telecommunications Standards Development Society |
| TSN | Time‐Sensitive Networking |
| TSON | Time Shared Optical Network |
| TTA | Telecommunications Technology Association |
| TTC | Telecommunication Technology Committee |
| TTI | Transmission Time Interval |
| TV | Television |
| Tx | Transmitter |
| UC | Use Case |
| UCA | Use Customer Address |
| UDM | Unified Data Management |
| UDN | Ultra‐Dense Network |
| UDP | User Datagram Protocol |
| UE | User Equipment |
| UEFA | Union of European Football Associations |
| UF‐OFDM | Universal Filtered OFDM |
| UHD | Ultra High Definition |
| UHF | Ultra High Frequency |
| UK | United Kingdom |
| UL | Uplink |
| UM | Unacknowledged Mode |
| UMA | Unlicensed Mobile Access |
| UP | User Plane |
| UPF | User Plane Function |
| URLLC | Ultra‐Reliable Low‐Latency Communications |
| US | United States (of America) |
| USRP | Universal Software Radio Peripheral |
| UTRA | Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access |
| UW | Unique Word |
| V2I | Vehicle‐to‐Infrastructure |
| V2N | Vehicle‐to‐Network |
| V2P | Vehicle‐to‐Pedestrian |
| V2V | Vehicle‐to‐Vehicle |
| V2X | Vehicle‐to‐Everything |
| VCO | Voltage‐Controlled Oscillator |
| VGA | Variable Gain Amplifier |
| VI | Virtualized Infrastructure |
| VIM | Virtual Infrastructure Manager |
| VLAN | Virtual Local Area Network |
| VLIW | Very Long Instruction Word |
| VNF | Virtual Network Function |
| VNFM | VNF Manager |
| VNN | Vehicular Nomadic Node |
| VoD | Verify‐on‐Demand |
| VoLTE | Voice over LTE |
| VPN | Virtual Private Networks |
| VR | Virtual Reality |
| vRAN/VRAN | Virtual Radio Access Network |
| VSF | Virtual Security Function |
| VSTD | Vertical Security and Trust Domains |
| WAN | Wide Area Network |
| WAS | Wireless Access System |
| WAVE | Wireless Access in Vehicular Environments |
| WBI | West Bound Interface |
| WCDMA | Wideband Code Division Multiple Access |
| WDM | Wavelength Division Multiplexing |
| WFQ | Weighted Fair Queueing |
| WI | Work Item |
| Wi‐Fi | Technology for wireless local area networking based on IEEE 802.11 standards |
| WIM | WAN Infrastructure Manager |
| WIMAX | Worldwide Interoperability for Microwave Access |
| WINNER‐II | Wireless world INitiative NEw Radio phase II |
| WLAN | Wireless Local Area Network |
| W‐OFDM | Windowed OFDM |
| WP5D | ITU‐R Work Package 5D |
| WRC | World Radiocommunication Conference |
| WRC‐15 | WRC in 2015 |
| WRC‐19 | WRC in 2019 |
| WRR | Weighted Round Robin |
| WSLM | Weighted Selective Mapping Technique |
| WSMP | WAVE Short Message Protocol |
| WT | WLAN Termination |
| X2 | Interface between base stations in LTE |
| XaaS | Everything‐as‐a‐Service |
| XGPON | 10‐Gigabit‐capable passive optical network |
| xMBB | extreme Mobile BroadBand |
| Xn | Interface between base stations in 5G |
| ZC | Zadoff‐Chu |
| ZP | Zero Padding |
| ZP‐OFDM | Zero Padding OFDM |
| ZT | Zero Tail |
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