name: CBC
full_form: Cell Broadcast Centre
context: Figure 5.1: PWS system architecture overview Figure 5.1 gives an overview of the system architecture. - Air interface between UE and access network needs security protection as PWS Warning Notification messages are broadcast to UE via SYSTEM INFORMATION. - CBC is part of the core network and connects to the network entity. For GERAN, CBC connects with the access network entity BSC. For UTRAN, CBC connects with the access network entity RNC. For E-UTRAN, CBC connects with the core network entity MME. The protocols between the CBC and these network entities are defined in 3GPP TS 48.049 [4], TS 25.419 [5], TS 23.041 [3] and TS 29.168 [25]. - CBE is on a national level and outside of the scope of the 3GPP network. It is assumed that the CBE is responsible for all aspects of formatting CBS, including the splitting of a CBS message into a number of pages and the actual signing. - MSC/SGSN or MME can be used to deliver PWS keys to UEs. Editor's Note: The security solution should minimize the
description: The Cell Broadcast Centre (CBC) is a network function responsible for broadcasting warning notifications to user equipment (UE) via system information messages over the air interface. It connects with various access network entities such as BSC, RNC, and MME in different radio access technologies like GERAN, UTRAN, and E-UTRAN.
explanation: CBC is classified as a Network Function because it performs a specific task within the telecommunications network: broadcasting warning notifications to user equipment. It interacts with other network elements to achieve this function.
section_title: 5	System architecture of PWS
biotag_Context: O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,B-Device,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Organization,B-Specification,O,O,B-Specification,O,O,B-Specification,O,O,O,B-Specification,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,B-Organization,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O