name: SRB1
full_form: Signalling Radio Bearer 1
context: The UECapabilityEnquiry message is used to request UE radio access capabilities for NR as well as for other RATs. Signalling radio bearer: SRB1 RLC-SAP: AM Logical channel: DCCH Direction: Network to UE UECapabilityEnquiry message -- ASN1START -- TAG-UECAPABILITYENQUIRY-START UECapabilityEnquiry ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { ueCapabilityEnquiry UECapabilityEnquiry-IEs, criticalExtensionsFuture SEQUENCE {} } } UECapabilityEnquiry-IEs ::= SEQUENCE { ue-CapabilityRAT-RequestList UE-CapabilityRAT-RequestList, lateNonCriticalExtension OCTET STRING OPTIONAL, ue-CapabilityEnquiryExt OCTET STRING (CONTAINING UECapabilityEnquiry-v1560-IEs) OPTIONAL -- Need N } UECapabilityEnquiry-v1560-IEs ::= SEQUENCE { capabilityRequestFilterCommon UE-CapabilityRequestFilterCommon OPTIONAL, -- Need N nonCriticalExtension UECapabilityEnquiry-v1610-IEs OPTIONAL } UECapabilityEnquiry-v1610-IEs ::= SEQUENCE { rrc-SegAllowed-r16 ENUMERATED {enabled} OPTIONAL, -- Need N nonCriticalExtension SEQUENCE {} OPTIONAL } -- TAG-UECAPABILITYENQUIRY-STOP -- ASN1STOP
description: Signalling Radio Bearer 1 (SRB1) is a logical channel used for transmitting control plane information between the network and user equipment (UE). It is utilized in the context of radio resource control (RRC) protocol, specifically for carrying signalling messages such as UECapabilityEnquiry. SRB1 operates on the RLC-SAP (Radio Link Control - Service Access Point) AM (Acknowledged Mode), ensuring reliable transmission of critical control information.
explanation: SRB1 is classified as a Channel because it serves as a specific path for data transmission, in this case, signalling messages between the network and UE. The provided context from 3GPP TS 38.331 highlights its role in carrying UECapabilityEnquiry messages, which are crucial for radio access capability enquiries.
section_title: â UECapabilityEnquiry
biotag_Context: O,O,O,O,O,O,O,B-Device,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,B-Connection,O,B-Miscellaneous,O,O,B-Connection,O,B-Network,O,B-Device,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,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,O,O,O,O,O,O,O,O
biotag_Description: B-Connection,I-Connection,I-Connection,I-Connection,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,O,O,O,O,B-Connection,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O