name: BCH
full_form: Broadcast Channel
context: The BCH channel has a fixed/constant throughput (12.3 kbps), i.e. broadcasts a 246 bits BCH transport block every 20 ms TTI. The BCH transport block carries a SYSTEM INFORMATION message which includes the SFN (11 bits). A SYSTEM INFORMATION message may include one or more segments. The maximum size of a segment depends on the segment type, but is in the order of 28 octets. There are different factors determining the BCH load, but the main factors are the SIB configuration of the SIBs (e.g. repetition period, scheduling, segmentation and concatenation), the number of supported features (e.g. common E-DCH) and the amount of information broadcasted (e.g. number of neighbors relations, use of explicit configuration instead of mandatory defaults). The aim of the study item is to investigate the need for additional BCH capacity, i.e. evaluate the scenarios where the BCH capacity limit is reached.
description: The Broadcast Channel (BCH) is a communication channel in the 3GPP network that broadcasts system information to user equipment. It has a fixed throughput of 12.3 kbps and carries SYSTEM INFORMATION messages, which may include one or more segments. The BCH load is determined by various factors such as SIB configuration, supported features, and the amount of broadcasted information.
explanation: The text describes the BCH as a channel dedicated to broadcasting system information within the 3GPP network, aligning with the definition of a Channel entity type.
section_title: 4	Introduction
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