Telecom

UARFCN UTRA Absolute Radio Frequency Channel Number

In the context of 3G (Third Generation) mobile communication systems,

UAR User authorization request

UAR (User Authorization Request): UAR, which stands for User Authorization

UAQ (Unmanned Aerial Qualification)

"UAQ" (Unmanned Aerial Qualification) was not a widely

UAC User Agent Client

In the context of VoIP (Voice over Internet Protocol) and

UABS unmanned aerial base station

"UABS" or "Unmanned Aerial Base Station"

UA User association

User Association (UA) is a crucial concept in wireless communication

UA User agent

A User Agent (UA) is a software application or program

UA Unnumbered Acknowledgement

UA (Unnumbered Acknowledgement) is a control frame used in data

U2X UAV-to-everything

"U2X" (UAV-to-everything) was not a widely recognized term

U2U UAV-to-UAV

U2U (UAV-to-UAV) communication refers to the direct and autonomous exchange