name: RAB
full_form: Radio Access Bearer
context: Access Points between the Non Access Stratum and the Access Stratum. RAB sub-flows: RAB as defined in TR 21.905 [9] is realised by UTRAN through one to several sub-flows. These sub-flows correspond to the NAS service data streams that have QoS characteristics that differ in a predefined manner within a RAB e.g. different reliability classes. RAB sub-flows characteristics: 1) the sub-flows of a RAB are established and released together at the RAB establishment and release, respectively; 2) the sub-flows of a RAB are submitted and delivered together at the RAB SAP; 3) the sub-flows of a RAB are carried over the same Iu transmission connection; 4) the sub-flows of a RAB are organised in a predefined manner at the RAB SAP and over the Iu interface. The organisation is imposed by the NAS as part of its co-ordination responsibility. RAB sub-flows numbering (applies to support mode for predefined SDU size only): 1) RAB sub-flows are numbered from 1 to N (N is the number of sub-flows); 2) RAB
description: A Radio Access Bearer (RAB) is a channel that carries data between the Non-Access Stratum and the Access Stratum in a UMTS network. It is realized through one or several sub-flows, which correspond to NAS service data streams with different QoS characteristics.
explanation: The context describes RAB as an entity that facilitates communication between different strata of the network, specifically carrying data streams with varying QoS requirements. This description aligns with the definition of a Channel in the predefined categories.
section_title: 3.1	Definitions
biotag_Context: O,O,O,O,B-Protocol,I-Protocol,I-Protocol,O,O,O,O,B-Connection,O,B-Connection,O,O,O,B-Specification,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,B-Measurement,O,O,O,O,O,O,O,O,O,B-Connection,O,O,O,O,B-Connection,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,B-Connection,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,O,B-Connection,B-Interface,O,O,O,B-Interface,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,B-Connection,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection
biotag_Description: O,B-Connection,I-Connection,I-Connection,O,O,O,O,O,O,O,O,O,B-Protocol,I-Protocol,O,O,B-Network Function,I-Network Function,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,B-Measurement,O