name: DRT
full_form: Delay Reference Time
context: For OTDOA Radio Interface timing following agreements has been made: - IPDL is applicable both for TDD and FDD mode of operation. But the necessary parameters are different for the different DD modes. - Cell Setup procedure in NBPAP shall be used to configure IPDL parameters defining IPDL and optionally activate the IPDL. - Cell Reconfigure procedure shall be used to activate IPDL either by the IPDL parameters provided in the Cell Setup Procedure or the Cell Reconfigure procedure defining IPDL or to deactivate ongoing IPDL. - IPDL is activated according the IPDL parameters last provided. - IPDL parameters as described in [3] excluding the parameter IP_Offset defines the IPDL to be applied in the cell. - It is not allowed to reconfigure IPDL parameters defining IPDL if there is active IPDL ongoing in the cell. - Applying the IPDL is not the core function. - New Information exchange procedure in RNSAP is used to request and report the IPDL parameters as described in [3] when the
description: The Delay Reference Time (DRT) is a parameter used in High-Speed Downlink Shared Channel (HS-DSCH) data frames to assist in congestion estimation and detection. It is utilized by Node B to determine whether to reset or continue using previously received DRT and Frame Sequence Number (FSN) values for congestion detection purposes.
explanation: DRT is classified as a Parameter because it is described within the context as a specific value used for congestion estimation and detection in HS-DSCH data frames. The text explains how Node B utilizes the DRT, along with the FSN, to decide whether to reset or use previously received values for congestion detection.
section_title: 6.2.7.40	FSN/DRT Reset
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