name: SIB13
full_form: SystemInformationBlockType21
context: A UE capable of V2X sidelink communication initiates the transmission of SLSS and MasterInformationBlock-SL-V2X according to the conditions and the procedures specified for V2X sidelink communication in clause 5.10.7 of TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10]. NOTE 1: When applying the procedure in this clause, SIB13 and SIB14 correspond to SystemInformationBlockType21 and SystemInformationBlockType26 specified in TS 36.331[ Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification ]  [10] respectively.
description: System Information Block Type 21, abbreviated as SIB13, is a specific type of system information block that contains critical information about the network. It is used in conjunction with SystemInformationBlockType26 (SIB14) for V2X sidelink communication and is specified in the Evolved Universal Terrestrial Radio Access (E-UTRA) protocol specification.
explanation: SIB13 is classified as a Message because it represents a specific signaling data block transmitted by the network to user equipment, conveying essential system information necessary for V2X sidelink communication. This classification aligns with the context provided from the 3GPP TS 38.331 and TS 36.331 specifications.
section_title: 5.8.5a.2 Initiation
biotag_Context: O,B-Device,O,O,B-Technology,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,B-Specification,O,B-Network,I-Network,I-Network,I-Network,I-Network,O,B-Protocol,I-Protocol,I-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,B-Message,O,O,B-Message,O,B-Message,O,O,B-Specification,O,B-Network,I-Network,I-Network,I-Network,I-Network,O,B-Protocol,I-Protocol,I-Protocol,O,O,O,O,O,O
biotag_Description: B-Message,I-Message,I-Message,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-Message,O,O,B-Technology,O,O,O,O,O,O,O,B-Network,I-Network,I-Network,I-Network,I-Network,O,O,O