name: DRNS
full_form: Drift RNS
context: For GERAN Iu-mode the following shall apply in addition for the successful operation of the RAB Assignment procedure: - In case of GERAN Iu-mode, for a RAB requested to be setup or modified from the CS domain, the RAB ASSIGNMENT REQUEST message may contain the GERAN BSC Container IE in order to provide GERAN-specific information to GERAN (see TS 43.051 [27]). - In case of GERAN Iu-mode (only for CS), if the BSC cannot provide an appropriate RAB corresponding to the content of the GERAN BSC Container IE (if received), the BSC shall report unsuccessful RAB establishment/modification indicating the cause value "GERAN Iu-mode Failure" and the GERAN Classmark IE in the GERAN Iu mode specific RABs Failed To Setup Or Modify List IE within the RAB ASSIGNMENT RESPONSE message.
description: The Drift RNS (DRNS) refers to a specific configuration or mode of operation within the Radio Network Subsystem (RNS) in UMTS networks. It is involved in managing radio links and configuring communication contexts for efficient data transmission, particularly in relation to the High-Speed Downlink Packet Access (HSDPA) feature.
explanation: The context provided highlights DRNS's role in managing radio links, configuring communication contexts, and making decisions based on specific information elements (IEs). This indicates that DRNS is not just a simple network function but rather a collective set of functionalities or a group within the RNS, hence classified as a NetworkFunction_Group.
section_title: 8.3.2.2	Successful Operation
biotag_Context: O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,B-Network,O,O,O,B-Connection,O,O,O,O,O,O,O,O,B-Mode,O,O,B-Connection,O,O,O,O,O,O,B-Network,B-Network Function,O,B-Message,O,O,O,O,O,O,O,B-Network,O,B-Specification,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Connection,O,O,O,O,O,O,B-Network,B-Network Function,O,B-Message,O,O,O,B-Network Function,O,O,O,B-Connection,O,O,O,O,O,O,O,O,O,O,B-Network,O,B-Message,O,O,B-Mode,I-Mode,I-Mode,O,O,O,O,O,O,O,O,B-Message,O,O,B-Connection,O,O,O
biotag_Description: O,B-Network,I-Network,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,I-Network Function,I-Network Function,O,O,B-Technology,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,O