| UARFCN |
UTRA
(UMTS) Absolute Radio Frequency Channel Number |
| UAS |
Uplink
EGPRS2-A Level Scheme |
| UBS |
Uplink
EGPRS2-B Level Scheme |
| UCI |
Uplink
Control Information |
| UDC |
Utility
Data Center |
| UDI |
Unrestricted
Digital Information |
| UDP |
Unit
Data Protocol |
| UDP |
User
Datagram Protocol |
| UDR |
User
Data Repository |
| UE |
User
Equipment |
| UEA |
UMTS
Encryption Algorithm |
| UE-AMBR |
UE
Aggregate Maximum Bit Rate |
| UGC |
User
Generated Content |
| UHF |
Ultra
High Frequency |
| UIA |
UMTS
Integrity Algorithm |
| UICC |
Universal
Integrated Circuit Card (It may contain one or more applications, ex: a
USIM UL) |
| UL |
Uplink
(subscriber to base station transmission) |
| ULA |
Uniform
Linear Array |
| UL BLER |
Uplink
Block Error Rate |
| UL-MIMO |
Uplink
Multiple Input Multiple Output |
| UL-SC |
Uplink
Scrambling Code |
| UL-SCH |
Uplink
Shared Channel |
| UL-SF |
Uplink
Spreading Factor |
| Um |
GSM
air interface |
| UM |
Unacknowledged
Mode |
| UMA |
Unlicensed
Mobile Access |
| UMB |
Ultra
Mobile Broadband |
| UMD |
Ultra
Mobile Device |
| UMD |
Unacknowledged
Mode Data |
| UMSC |
UMTS
MSC |
| UMTS |
Universal
Mobile Telecommunication System, also known as WCDMA |
| UNI |
User-Network
Interface |
| UniPro |
Unified
Protocol |
| UPE |
User
Plane Entity |
| U-Plane |
User
Plane |
| UpPTS |
Uplink
Pilot Time Slot |
| UpTS |
Uplink
Time Slot |
| URA |
UTRAN
(UMTS) Registration Area |
| URA_PCH |
UTRAN
Registration Area_Paging Channel |
| URI |
Uniform
Resource Identifiers / Identity (SIP) |
| URL |
Uniform
Resource Locator |
| URN |
Uniform
Resource Names |
| U-RNTI |
UTRAN
Radio Network Temporary Identifier |
| USB |
Universal
Serial Bus |
| USB-IC |
Universal
Serial Bus-Integrated Circuit |
| USAT |
USIM
Application Toolkit |
| USAT/SAT |
USIM/SIM
Application Toolkit |
| USCH |
Uplink
Shared Channel |
| USIM |
Universal
SIM |
| USSD |
Unstructured
Supplementary Service Data |
| USSDC |
USSD
Centre |
| UTC |
Universal
Time Coordinated |
| UTRA |
Universal
/ UMTS Terrestrial Radio Access |
| UTRAN |
UMTS
Terrestrial Radio Access Network |
| Uu |
UMTS
air interface |
| UWB |
Ultra
Wide Band |
RadioCom
Valley
