Telecom Acronyms

Global standards body that defines cellular technologies from 3G to 6G.

RAN architecture with AI/ML embedded in core signal processing and resource management.

5G core function handling UE registration, connection, and mobility.

1G analog cellular standard used in North America from 1983.

Device providing wireless connectivity, typically Wi-Fi.

Unique number identifying a specific radio frequency in cellular systems.

Equipment that processes baseband signals in a base station. Being virtualized in O-RAN.

7G research area: direct neural-to-network communication for immersive experiences.

Fixed radio transceiver serving as the hub of a cell in a cellular network.

Range of frequencies available for data transmission. Wider = faster.

5G NR concept allowing UEs to operate on a subset of the carrier bandwidth.

Architecture centralizing baseband processing in a data center, connected to remote radio heads.

Combining multiple frequency bands to increase throughput. Used in LTE-A and 5G.

US shared spectrum band (3.5 GHz) enabling private LTE/5G networks.

Multiple access method using unique codes per user. Basis of 3G (WCDMA, cdma2000).

Central part of the network providing routing, authentication, and service delivery.

Technique where multiple base stations jointly transmit to/receive from a UE at cell edges.

Network layer handling signaling, session management, and routing decisions.

Interface standard between baseband units and remote radio heads in base stations.

UE feedback on downlink channel quality, used for link adaptation.

O-RAN component handling non-real-time RAN functions (RRC, PDCP).

Direct communication between devices without going through a base station.

Data transmission from base station to user device.

Reference signal used by the receiver to estimate channel conditions for demodulation.

Power-saving mode where UE periodically wakes up to check for data.

Real-time allocation of spectrum based on demand and availability. Key 6G concept.

Mathematical manipulation of signals for filtering, compression, and analysis.

Sharing spectrum between 4G and 5G on the same carrier simultaneously.

O-RAN component handling real-time RAN functions (RLC, MAC, PHY-high).

Covering the entire path from source to destination in a network.

Evolved fronthaul interface with lower bandwidth requirements than CPRI.

2.75G technology. Improved GPRS data rates to ~384 kbps.

5G use case: high-speed data for smartphones, VR, video streaming.

4G LTE base station. Replaced by gNB in 5G NR.

4G LTE core network architecture. Replaced by 5GC in 5G.

European standards body contributing to 3GPP and other telecom standards.

Using separate frequencies for uplink and downlink transmission.

Dividing spectrum into frequency channels, one per user. Used in 1G.

Adding redundancy to transmitted data so receiver can correct errors without retransmission.

5G NR bands below 7.125 GHz (sub-6 GHz). Main 5G deployment range.

5G NR mmWave bands (24.25–52.6 GHz). High speed, short range.

Wireless communication using light through air. THz alternative for backhaul.

Using cellular (4G/5G) as home broadband replacement. Growing 5G use case.

Satellite orbit at ~36,000 km. High latency (~600ms) but wide coverage.

5G NR base station. Supports SA and NSA architectures.

Satellite positioning (GPS, Galileo, GLONASS). 6G integrates with cellular positioning.

2.5G data service. First "always-on" mobile data at ~50 kbps.

2G digital cellular standard. First global mobile standard, launched 1991.

Drone or balloon at 20+ km altitude providing cellular coverage. Part of 6G NTN.

Combining FEC with retransmission for reliable data delivery.

Network mixing macro, micro, pico, and femto cells for coverage and capacity.

3.5G upgrade delivering up to 42 Mbps. Bridged gap to 4G.

Using same mmWave spectrum for both user access and backhaul to core.

IoT for manufacturing, logistics, energy. Requires ultra-reliable low-latency.

ITU framework defining requirements for each wireless generation.

Network of connected devices/sensors. 6G targets 10M devices per km².

Using same signal for data transmission and radar-like sensing. Core 6G capability.

Signal distortion where symbols overlap in time. Worse at higher speeds.

UN agency coordinating global telecom standards and spectrum allocation.

Error correction code used in 5G NR data channels. Near Shannon limit efficiency.

Satellite orbit at 200–2000 km. Low latency (~20ms). Starlink, Kuiper, OneWeb.

Direct unobstructed path between transmitter and receiver. Required for THz/mmWave.

4G standard delivering up to 300 Mbps. Dominant global mobile technology.

Protocol layer managing access to shared radio resources.

Computing at network edge for low-latency applications. AR, gaming, industrial.

Satellite orbit at 2,000–36,000 km. Balance of coverage and latency.

Using multiple antennas for spatial multiplexing. Foundation of modern wireless.

64+ antenna elements for beamforming. Essential for 5G and 6G capacity.

5G use case: connecting millions of low-power IoT devices per km².

Frequencies 24–100 GHz. High bandwidth, short range. Used in 5G FR2.

Company operating a cellular network (AT&T, Vodafone, etc.).

Multiple operators sharing RAN while maintaining separate core networks.

Sharing RAN infrastructure including spectrum between operators.

Operator using another MNO's network infrastructure.

Largest annual telecom conference, held in Barcelona.

LPWAN technology in LTE for low-power wide-area IoT devices.

Communication path with obstructions. RIS helps enable NLOS at high frequencies.

5G radio access technology defined by 3GPP. Supports sub-6 and mmWave.

5G core service discovery and registration function.

5G deployment using 4G LTE core (EPC). Transitional architecture.

Satellite and HAPS integrated with cellular. Native in 6G architecture.

Disaggregated RAN with open interfaces between vendors. Reduces lock-in.

Modulation splitting data across subcarriers. Used in 4G/5G. Sensitive to Doppler.

Multi-user extension of OFDM. Assigns subcarrier groups to different users.

Modulation using delay-Doppler domain. Better than OFDM for high-mobility 6G/7G.

Component amplifying radio signals for transmission. Efficiency critical at THz.

5G NR channel carrying essential system information for initial cell access.

Carries scheduling decisions and control information in 5G NR.

Protocol layer handling header compression, ciphering, and integrity protection.

Main data channel in 5G NR downlink.

Lowest protocol layer handling modulation, coding, and signal transmission.

An operator's complete cellular network identified by MCC+MNC.

Channel used by UE to initiate connection with base station.

Smallest unit of radio resources allocated to a user in LTE/NR.

Carries uplink control information (ACK/NACK, CQI, scheduling requests).

Main data channel in 5G NR uplink.

Encodes data in amplitude and phase. 256-QAM and 1024-QAM used in 5G.

Network mechanisms ensuring performance guarantees (latency, throughput, reliability).

Network between user devices and core. Includes base stations and antennas.

Unit of time-frequency resources in OFDM systems.

Electromagnetic frequencies used for wireless communication (3 kHz – 300 GHz).

O-RAN component for AI/ML-based RAN optimization. Near-RT and Non-RT variants.

Programmable panels redirecting radio signals. Extends coverage without extra base stations.

Protocol layer handling segmentation, reassembly, and retransmission of packets.

Temporary ID assigned to UE for scheduling and identification.

Protocol managing connection setup, configuration, and handovers.

Radio unit mounted near antenna, connected to centralized baseband via fronthaul.

Algorithms managing spectrum, power, and interference across the RAN.

Measurement of signal strength from a cell. Used for cell selection and handover.

Signal quality measurement combining RSRP and interference level.

O-RAN component handling RF and lower PHY processing near the antenna.

5G deployment with its own 5G core (5GC). Full 5G capabilities.

5G core design using microservices communicating via APIs.

5G NR supports flexible SCS (15/30/60/120/240 kHz) for different bands.

Separating control plane from data plane for programmable network management.

Card/chip storing subscriber identity and authentication credentials.

Key metric of signal quality. Higher SINR = better throughput.

Contractual performance guarantees between operator and customer.

5G core function managing PDU sessions and IP address allocation.

Automated network configuration, optimization, and healing. Evolved by AI in 6G.

5G NR signal used for cell search, synchronization, and initial access.

Frequencies 100–300 GHz. Primary candidate for 6G/7G high-capacity links.

Using same frequency for uplink and downlink, alternating in time.

Dividing time into slots, one per user. Used in 2G GSM.

Frequencies 0.3–10 THz. 7G targets THz for 10+ Tbps short-range links.

Duration of one scheduling unit. Shorter TTI = lower latency.

5G core function managing subscriber data and profiles.

Any device connecting to the cellular network (phone, tablet, IoT sensor).

Data transmission from user device to base station.

5G core function handling data packet routing, forwarding, and inspection.

5G use case: <1ms latency, 99.999% reliability. Industrial automation, remote surgery.

Vehicular communication (V2V, V2I, V2P). Critical for autonomous driving.

Voice calls over 4G data network instead of legacy circuit-switched.

Voice calls natively over 5G NR. Requires SA deployment.

Running RAN functions as software on general-purpose servers.

ITU conference (every 3-4 years) allocating global spectrum. WRC-27 key for 6G.

Umbrella for AR, VR, MR. Key 6G/7G use case requiring Gbps and <5ms latency.

ETSI framework for fully automated network management using AI.