name: DOFFTDD
full_form: TDD Default DPCH Offset value
context: state. Resolution: 512 chips; Range: 0 .. 599 (< 80 ms). [TDD â DOFFTDD] The DOFFTDD (TDD Default DPCH Offset value) is used to define Frame Offset at first RL setup, in order to spread out load over /Iur and load in Node B (based on certain load distributing algorithms). The SRNC sends a DOFFTDD parameter to the UE when the new RL will make the UE change its state (from Cell_FACH state or other when coming from another RAN) to the Cell_DCH state. Resolution: 1 frame; Range: 0 .. 7 frames. [FDD â Chip Offset] The Chip Offset is used as offset for the DL DPCH or the F-DPCH relative to the PCCPCH timing. The Chip Offset parameter has a resolution of 1 chip and a range of 0 .. 38399 (< 10 ms). The Chip Offset parameter is calculated by the SRNC and provided to the Node B. Frame Offset + Chip Offset (sent via NBAP) are in Node B rounded together to closest 256 chip boundary. The 256 chip boundary is used regardless of the used spreading factor, also when the spreading factor is 512. The
description: The DOFFTDD (TDD Default DPCH Offset value) is a parameter used in Time Division Duplexing (TDD) mode to define the Frame Offset at the first Radio Link (RL) setup, aiming to distribute load over the Iur interface and Node B based on specific algorithms. It has a resolution of 1 frame and a range of 0 to 7 frames.
explanation: The context explicitly describes DOFFTDD as a parameter used in TDD mode for load distribution purposes, indicating its role as a configuration setting within the network. This classification is further supported by the mention of its resolution and range, which are typical characteristics of parameters in telecommunications.
section_title: 5	Synchronisation Counters and Parameters
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