SSF Service Switching Function
SSN Sub-System Number
SSS Secondary Synchronization Signal
SSS_RA SSS-to-RS EPRE ratio for the channel
SSSAR Service Specific Segmentation and Re-assembly sublayer
SSSS Secondary Sidelink Synchronization Signal
SSSSSSS Secondary Sidelink Synchronization Signal
SSTD SFN and Subframe Timing Difference
sTAG Secondary Timing Advance Group
STC Signalling Transport Converter
STCH Sidelink Traffic Channel
STMR SideTone Masking Rating
S-TMSI SAE Temporary Mobile Station Identifier
STP Signalling Transfer Point
STTD Space Time Transmit Diversity
SU Scheduling Unit
SuM Subscription Management
SUPL Secure User Plane Location
SV Space Vehicle
SVC Switched virtual circuit
SVN Software Version Number
SW Status Word
SW1/SW2 Status Word 1/Status Word 2
T Timer
Teleservice
Transparent
TA Tracking Area, зона отслеживания.
TA Timing Advance
Terminal Adaptation
TAC Type Approval Code
TAF Terminal Adaptation Function
TAG Timing Advance Group
TAI Tracking Area Identity, идентификатор зоны отслеживания.
TAR Toolkit Application Reference
TB Transport Block
TBD To Be Defined
TBF Temporary Block Flow
TBR Technical Basis for Regulation
TBS Transport Block Size
TC Transaction Capabilities
TransCoder
Transmission Convergence
TCH Traffic Channel
TCH/F A full rate TCH
TCH/F2,4 A full rate data TCH (≤ 2,4kbit/s)
TCH/F4,8 A full rate date TCH (4,8kbit/s)
TCH/F9,6 A full rate data TCH (9,6kbit/s)
TCH/FS A full rate Speech TCH
TCH/H A half rate TCH
TCH/H2,4 A half rate data TCH (≤2,4kbit/s)
TCH/H4,8 A half rate data TCH (4,8kbit/s)
TCH/HS A half rate Speech TCH
TCI Transceiver Control Interface
TCP Transmission Control Protocol, управляющий протокол передачи данных на транспортном уровне.
TC-TR Technical Committee Technical Report
TD Transmit Diversity, пространственно-временное кодирование.
TD-CDMA Time Division-Code Division Multiple Access
TDD Time Division Duplex , дуплексный канал с временным разнесением
TDM Time Division Multiplexing
TDMA Time Division Multiple Access
TDoc Temporary Document
TE Terminal Equipment
TE9 Terminal Equipment 9 (ETSI sub-technical committee)
Tei Terminal endpoint identifier
TEID Tunnel End Point Identifier
TF Transport Format
TFA TransFer Allowed
TFC Transport Format Combination
TFCI Transport Format Combination Indicator
TFCS Transport Format Combination Set
TFI Transport Format Indicator
Temporary Flow Identity
TFIN Transport Format INdicator
TFP TransFer Prohibited
TFS Transport Format Set
TFT Traffic Flow Template
TI Transaction Identifier
Time Slot
TLLI Temporary Logical Link Identity
TLM TeLeMetry word
TLS Transport Layer Security
TLV Tag Length Value
TM Telecom Management
Transparent Mode
TMA Tower Mounted Amplifier
TMAAP Tower Mounted Amplifier application part
TMF Telecom Management Forum
TMGI Temporary Mobile Group Identity
TMN Telecom Management Network
TMSI Temporary Mobile Subscriber Identity
TN Termination Node
Timeslot Number
TNL Transport Network Layer, уровень транспортной сети. Один из двух (совместно с уровнем радиосети) уровней логического разделения области сети радиодоступа.
TO Telecom Operations Map
TOA Time of Arrival
TOD Time Of Day
TON Type Of Number
TOW Time Of Week
TP Third Party
TPC Transmit Power Control, механизм управления мощностью передачи.
TPC-PUCCH-RNTI Transmit Power Control-Physical Uplink Control Channel-RNTI
TPC-RNTI Transmit Power Control RNTI
TPDU Transfer Protocol Data Unit
TPMI Transmitted Precoding Matrix Indicator
TR Technical Report
TRAU Transcoder and Rate Adapter Unit
TrCH Transport Channel
T-RPT Time Resource Pattern of Transmission
TRX Transceiver
TS Technical Specification
TSC Training Sequence Code
TSDI Transceiver Speech & Data Interface
TSG Technical Specification Group
T-SGW Transport Signalling Gateway
TSTD Time Switched Transmit Diversity
TTCN TTCN-2 or TTCN-3
TTCN-2 Tree and Tabular Combined Notation version 2
TTCN-3 Testing and Test Control Notation version 3
TTI Transmission Timing Interval
TTT Time To Trigger
TUP Telephone User Part (SS7)
TV Type and Value
TX Diversity Transmit Diversity
Transmitter
Transmit
TXPWR Transmit PoWeR; Tx power level in the MS_TXPWR_REQUEST and MS_TXPWR_CONF parameters
UARFCN UTRA Absolute Radio Frequency Channel Number
UARFN UTRA Absolute Radio Frequency Number
UART Universal Asynchronous Receiver and Transmitter
UCI Uplink Control Information
UCS2 Universal Character Set 2
UDCH User-plane Dedicated CHannel
UDD Unconstrained Delay Data
UDI Unrestricted Digital Information
UDP User Datagram Protocol, протокол передачи пользовательских дейтаграмм, используемый в IP -сетях.
UDRE User Differential Range Error
UDUB User Determined User Busy
UE User Equipment, пользовательское оборудование. Совокупность
UED User Equipment Domain, область пользовательского оборудования. Является, совместно с областью сетевой инфраструктуры, первичным разделением сети LTE на физическом уровне.
UEM operating band Unwanted Emissions Mask
UER User Equipment with ODMA relay operation enabled
UI User Interface
Unnumbered Information (Frame)
UIA 3G Integrity Algorithm
UIC Union Internationale des Chemins de Fer
UICC Universal Integrated Circuit Card
UL Uplink (Reverse Link) восходящий
UL/CE неизвестно
UL-MIMO Up Link Multiple Antenna transmission
ULP User Plane Location Protocol
UL-SCH Uplink Shared Channel, транспортный восходящий совместный канал.
UM Unacknowledged Mode, режим без подтверждения. Один из двух (совместно с AM) режимов передачи данных RLC-подуровня.
UML Unified Modelling Language
UMS User Mobility Server
UMSC UMTS Mobile Services Switching Centre
UMTS Universal Mobile Telecommunications System
UNI User-Network Interface
UP User Plane, пользовательская плоскость. Часть состава и функционирования протоколов интерфейсов Uu и S1, относящаяся к передаче пользовательской информации.
UPCMI Uniform PCM Interface (13-bit)
UPD Up to date
UPE User Plane Entity
U-plane User plane
UpPTS Uplink pilot time slot, пилотный слот (точка переключения) нисходящего направления.
UPT Universal Personal Telecommunication
URA User Registration Area
URAN UMTS Radio Access Network
URB User Radio Bearer
URI Uniform Resource Identifier
URL Universe Resource Location – адрес местоположения интернет ресурса.
U-RNTI UTRAN Radio Network Temporary Identity
USAT USIM Application Toolkit
USB Universal Serial Bus
USC UE Service Capabilities
USCH Uplink Shared Channel
USF Uplink State Flag
USIM Universal Subscriber Identity Module
USNO US Naval Observatory
USSD Unstructured Supplementary Service Data
UT Universal Time
UT1 Universal Time No.1
UTC Coordinated Universal Time
UTRA UMTS Terrestrial Radio Access
UTRAN Universal Terrestrial Radio Access Network
Registration Area
UUI User-to-User Information
UUS Uu Stratum
User-to-User Signalling
Uu-интерфейс логический стык между областью пользовательского оборудования и области сети радиодоступа.
V Value only
V(SD) Send state variable
V2I Vehicle-to-Infrastructure
V2N Vehicle-to-Network
V2P Vehicle-to-Pedestrian
V2V Vehicle-to-Vehicle